'97 Grand fuel pump relay killed fuel pump?
07-11-2007, 04:03 PM
#11
Guest
Posts: n/a
Re: '97 Grand fuel pump relay killed fuel pump?
Thanks Bill,
Already replaced the crank position sensor when previously chasing P0351
codes. Did not seem to have any impact, but I hear it often accounts for
strange problems.
"L.W. (Bill) ------ III" <LWBill------@------.net> wrote in message
news:46944946$0$16366$88260bb3@free.teranews.com.. .
> I can tell you my fuel pump took out it's relay, it wouldn't stop
> running the pump with the ignition off. It ran another couple of months
> with
> a new relay and replaced culprit clogged filter. As a test it should run
> for
> a couple of seconds every time you turn on the ignition key on then shut
> off, if the engine is not started. But this really sounds like the
> Crankshaft Position Sensor:
> http://jeep.off-road.com/jeep/articl....jsp?id=257990 That's
> why
> I asked you to test for the sound of fuel to confirm it's really not
> running.
> God Bless America, Bill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
Already replaced the crank position sensor when previously chasing P0351
codes. Did not seem to have any impact, but I hear it often accounts for
strange problems.
"L.W. (Bill) ------ III" <LWBill------@------.net> wrote in message
news:46944946$0$16366$88260bb3@free.teranews.com.. .
> I can tell you my fuel pump took out it's relay, it wouldn't stop
> running the pump with the ignition off. It ran another couple of months
> with
> a new relay and replaced culprit clogged filter. As a test it should run
> for
> a couple of seconds every time you turn on the ignition key on then shut
> off, if the engine is not started. But this really sounds like the
> Crankshaft Position Sensor:
> http://jeep.off-road.com/jeep/articl....jsp?id=257990 That's
> why
> I asked you to test for the sound of fuel to confirm it's really not
> running.
> God Bless America, Bill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
07-11-2007, 04:03 PM
#12
Guest
Posts: n/a
Re: '97 Grand fuel pump relay killed fuel pump?
Thanks Bill,
Already replaced the crank position sensor when previously chasing P0351
codes. Did not seem to have any impact, but I hear it often accounts for
strange problems.
"L.W. (Bill) ------ III" <LWBill------@------.net> wrote in message
news:46944946$0$16366$88260bb3@free.teranews.com.. .
> I can tell you my fuel pump took out it's relay, it wouldn't stop
> running the pump with the ignition off. It ran another couple of months
> with
> a new relay and replaced culprit clogged filter. As a test it should run
> for
> a couple of seconds every time you turn on the ignition key on then shut
> off, if the engine is not started. But this really sounds like the
> Crankshaft Position Sensor:
> http://jeep.off-road.com/jeep/articl....jsp?id=257990 That's
> why
> I asked you to test for the sound of fuel to confirm it's really not
> running.
> God Bless America, Bill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
Already replaced the crank position sensor when previously chasing P0351
codes. Did not seem to have any impact, but I hear it often accounts for
strange problems.
"L.W. (Bill) ------ III" <LWBill------@------.net> wrote in message
news:46944946$0$16366$88260bb3@free.teranews.com.. .
> I can tell you my fuel pump took out it's relay, it wouldn't stop
> running the pump with the ignition off. It ran another couple of months
> with
> a new relay and replaced culprit clogged filter. As a test it should run
> for
> a couple of seconds every time you turn on the ignition key on then shut
> off, if the engine is not started. But this really sounds like the
> Crankshaft Position Sensor:
> http://jeep.off-road.com/jeep/articl....jsp?id=257990 That's
> why
> I asked you to test for the sound of fuel to confirm it's really not
> running.
> God Bless America, Bill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
07-11-2007, 04:03 PM
#13
Guest
Posts: n/a
Re: '97 Grand fuel pump relay killed fuel pump?
Thanks Bill,
Already replaced the crank position sensor when previously chasing P0351
codes. Did not seem to have any impact, but I hear it often accounts for
strange problems.
"L.W. (Bill) ------ III" <LWBill------@------.net> wrote in message
news:46944946$0$16366$88260bb3@free.teranews.com.. .
> I can tell you my fuel pump took out it's relay, it wouldn't stop
> running the pump with the ignition off. It ran another couple of months
> with
> a new relay and replaced culprit clogged filter. As a test it should run
> for
> a couple of seconds every time you turn on the ignition key on then shut
> off, if the engine is not started. But this really sounds like the
> Crankshaft Position Sensor:
> http://jeep.off-road.com/jeep/articl....jsp?id=257990 That's
> why
> I asked you to test for the sound of fuel to confirm it's really not
> running.
> God Bless America, Bill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
Already replaced the crank position sensor when previously chasing P0351
codes. Did not seem to have any impact, but I hear it often accounts for
strange problems.
"L.W. (Bill) ------ III" <LWBill------@------.net> wrote in message
news:46944946$0$16366$88260bb3@free.teranews.com.. .
> I can tell you my fuel pump took out it's relay, it wouldn't stop
> running the pump with the ignition off. It ran another couple of months
> with
> a new relay and replaced culprit clogged filter. As a test it should run
> for
> a couple of seconds every time you turn on the ignition key on then shut
> off, if the engine is not started. But this really sounds like the
> Crankshaft Position Sensor:
> http://jeep.off-road.com/jeep/articl....jsp?id=257990 That's
> why
> I asked you to test for the sound of fuel to confirm it's really not
> running.
> God Bless America, Bill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
07-11-2007, 04:09 PM
#14
Guest
Posts: n/a
Re: '97 Grand fuel pump relay killed fuel pump?
Mike,
No codes on OBD II. I get codes 12 and 55 on the odometer and have for
months. I was told previously that code 12 always shows and is not an
indicator of a problem, even though it does not disappear after many start
cycles. Was I told wrong?
I had cleaned and reseated both the negative to body ground and the negative
to engine ground before the latest problem. I have not run the specific test
you mention. I will when I next get access to the car.
Thanks,
Joe M
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:4694d725$0$10412$9a6e19ea@unlimited.newshosti ng.com...
>
> You are still describing a code 12 issue I think.....
>
> I would be making 'really' sure the body of the vehicle had full power.
>
> To do this, I take a multimeter and read the volts at the battery posts
> with the engine running and the headlights and heater fan and wipers on. I
> then move the negative meter probe to the body with the positive still on
> the battery positive and compare the voltages.
>
> If the voltages are different, your body ground path is bad.
>
> Good luck!
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's - Gone to the rust pile...
> Canadian Off Road Trips Photos: Non members can still view!
> Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
> (More Off Road album links at bottom of the view page)
No codes on OBD II. I get codes 12 and 55 on the odometer and have for
months. I was told previously that code 12 always shows and is not an
indicator of a problem, even though it does not disappear after many start
cycles. Was I told wrong?
I had cleaned and reseated both the negative to body ground and the negative
to engine ground before the latest problem. I have not run the specific test
you mention. I will when I next get access to the car.
Thanks,
Joe M
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:4694d725$0$10412$9a6e19ea@unlimited.newshosti ng.com...
>
> You are still describing a code 12 issue I think.....
>
> I would be making 'really' sure the body of the vehicle had full power.
>
> To do this, I take a multimeter and read the volts at the battery posts
> with the engine running and the headlights and heater fan and wipers on. I
> then move the negative meter probe to the body with the positive still on
> the battery positive and compare the voltages.
>
> If the voltages are different, your body ground path is bad.
>
> Good luck!
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's - Gone to the rust pile...
> Canadian Off Road Trips Photos: Non members can still view!
> Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
> (More Off Road album links at bottom of the view page)
07-11-2007, 04:09 PM
#15
Guest
Posts: n/a
Re: '97 Grand fuel pump relay killed fuel pump?
Mike,
No codes on OBD II. I get codes 12 and 55 on the odometer and have for
months. I was told previously that code 12 always shows and is not an
indicator of a problem, even though it does not disappear after many start
cycles. Was I told wrong?
I had cleaned and reseated both the negative to body ground and the negative
to engine ground before the latest problem. I have not run the specific test
you mention. I will when I next get access to the car.
Thanks,
Joe M
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:4694d725$0$10412$9a6e19ea@unlimited.newshosti ng.com...
>
> You are still describing a code 12 issue I think.....
>
> I would be making 'really' sure the body of the vehicle had full power.
>
> To do this, I take a multimeter and read the volts at the battery posts
> with the engine running and the headlights and heater fan and wipers on. I
> then move the negative meter probe to the body with the positive still on
> the battery positive and compare the voltages.
>
> If the voltages are different, your body ground path is bad.
>
> Good luck!
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's - Gone to the rust pile...
> Canadian Off Road Trips Photos: Non members can still view!
> Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
> (More Off Road album links at bottom of the view page)
No codes on OBD II. I get codes 12 and 55 on the odometer and have for
months. I was told previously that code 12 always shows and is not an
indicator of a problem, even though it does not disappear after many start
cycles. Was I told wrong?
I had cleaned and reseated both the negative to body ground and the negative
to engine ground before the latest problem. I have not run the specific test
you mention. I will when I next get access to the car.
Thanks,
Joe M
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:4694d725$0$10412$9a6e19ea@unlimited.newshosti ng.com...
>
> You are still describing a code 12 issue I think.....
>
> I would be making 'really' sure the body of the vehicle had full power.
>
> To do this, I take a multimeter and read the volts at the battery posts
> with the engine running and the headlights and heater fan and wipers on. I
> then move the negative meter probe to the body with the positive still on
> the battery positive and compare the voltages.
>
> If the voltages are different, your body ground path is bad.
>
> Good luck!
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's - Gone to the rust pile...
> Canadian Off Road Trips Photos: Non members can still view!
> Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
> (More Off Road album links at bottom of the view page)
07-11-2007, 04:09 PM
#16
Guest
Posts: n/a
Re: '97 Grand fuel pump relay killed fuel pump?
Mike,
No codes on OBD II. I get codes 12 and 55 on the odometer and have for
months. I was told previously that code 12 always shows and is not an
indicator of a problem, even though it does not disappear after many start
cycles. Was I told wrong?
I had cleaned and reseated both the negative to body ground and the negative
to engine ground before the latest problem. I have not run the specific test
you mention. I will when I next get access to the car.
Thanks,
Joe M
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:4694d725$0$10412$9a6e19ea@unlimited.newshosti ng.com...
>
> You are still describing a code 12 issue I think.....
>
> I would be making 'really' sure the body of the vehicle had full power.
>
> To do this, I take a multimeter and read the volts at the battery posts
> with the engine running and the headlights and heater fan and wipers on. I
> then move the negative meter probe to the body with the positive still on
> the battery positive and compare the voltages.
>
> If the voltages are different, your body ground path is bad.
>
> Good luck!
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's - Gone to the rust pile...
> Canadian Off Road Trips Photos: Non members can still view!
> Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
> (More Off Road album links at bottom of the view page)
No codes on OBD II. I get codes 12 and 55 on the odometer and have for
months. I was told previously that code 12 always shows and is not an
indicator of a problem, even though it does not disappear after many start
cycles. Was I told wrong?
I had cleaned and reseated both the negative to body ground and the negative
to engine ground before the latest problem. I have not run the specific test
you mention. I will when I next get access to the car.
Thanks,
Joe M
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:4694d725$0$10412$9a6e19ea@unlimited.newshosti ng.com...
>
> You are still describing a code 12 issue I think.....
>
> I would be making 'really' sure the body of the vehicle had full power.
>
> To do this, I take a multimeter and read the volts at the battery posts
> with the engine running and the headlights and heater fan and wipers on. I
> then move the negative meter probe to the body with the positive still on
> the battery positive and compare the voltages.
>
> If the voltages are different, your body ground path is bad.
>
> Good luck!
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's - Gone to the rust pile...
> Canadian Off Road Trips Photos: Non members can still view!
> Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
> (More Off Road album links at bottom of the view page)
07-11-2007, 04:09 PM
#17
Guest
Posts: n/a
Re: '97 Grand fuel pump relay killed fuel pump?
Mike,
No codes on OBD II. I get codes 12 and 55 on the odometer and have for
months. I was told previously that code 12 always shows and is not an
indicator of a problem, even though it does not disappear after many start
cycles. Was I told wrong?
I had cleaned and reseated both the negative to body ground and the negative
to engine ground before the latest problem. I have not run the specific test
you mention. I will when I next get access to the car.
Thanks,
Joe M
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:4694d725$0$10412$9a6e19ea@unlimited.newshosti ng.com...
>
> You are still describing a code 12 issue I think.....
>
> I would be making 'really' sure the body of the vehicle had full power.
>
> To do this, I take a multimeter and read the volts at the battery posts
> with the engine running and the headlights and heater fan and wipers on. I
> then move the negative meter probe to the body with the positive still on
> the battery positive and compare the voltages.
>
> If the voltages are different, your body ground path is bad.
>
> Good luck!
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's - Gone to the rust pile...
> Canadian Off Road Trips Photos: Non members can still view!
> Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
> (More Off Road album links at bottom of the view page)
No codes on OBD II. I get codes 12 and 55 on the odometer and have for
months. I was told previously that code 12 always shows and is not an
indicator of a problem, even though it does not disappear after many start
cycles. Was I told wrong?
I had cleaned and reseated both the negative to body ground and the negative
to engine ground before the latest problem. I have not run the specific test
you mention. I will when I next get access to the car.
Thanks,
Joe M
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:4694d725$0$10412$9a6e19ea@unlimited.newshosti ng.com...
>
> You are still describing a code 12 issue I think.....
>
> I would be making 'really' sure the body of the vehicle had full power.
>
> To do this, I take a multimeter and read the volts at the battery posts
> with the engine running and the headlights and heater fan and wipers on. I
> then move the negative meter probe to the body with the positive still on
> the battery positive and compare the voltages.
>
> If the voltages are different, your body ground path is bad.
>
> Good luck!
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's - Gone to the rust pile...
> Canadian Off Road Trips Photos: Non members can still view!
> Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
> (More Off Road album links at bottom of the view page)
07-11-2007, 05:16 PM
#18
Guest
Posts: n/a
Re: '97 Grand fuel pump relay killed fuel pump?
Sometimes the cables can rot inside the clamps which is why the meter
test is a good one just to make sure.
It wouldn't hurt to meter the engine block with the volt test also.
Code 55 should be the only one.
Mike
Joe_M wrote:
> Mike,
>
> No codes on OBD II. I get codes 12 and 55 on the odometer and have for
> months. I was told previously that code 12 always shows and is not an
> indicator of a problem, even though it does not disappear after many start
> cycles. Was I told wrong?
>
> I had cleaned and reseated both the negative to body ground and the negative
> to engine ground before the latest problem. I have not run the specific test
> you mention. I will when I next get access to the car.
>
> Thanks,
>
> Joe M
>
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:4694d725$0$10412$9a6e19ea@unlimited.newshosti ng.com...
>> You are still describing a code 12 issue I think.....
>>
>> I would be making 'really' sure the body of the vehicle had full power.
>>
>> To do this, I take a multimeter and read the volts at the battery posts
>> with the engine running and the headlights and heater fan and wipers on. I
>> then move the negative meter probe to the body with the positive still on
>> the battery positive and compare the voltages.
>>
>> If the voltages are different, your body ground path is bad.
>>
>> Good luck!
>>
>> Mike
>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>> 88 Cherokee 235 BFG AT's - Gone to the rust pile...
>> Canadian Off Road Trips Photos: Non members can still view!
>> Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
>> (More Off Road album links at bottom of the view page)
>
>
test is a good one just to make sure.
It wouldn't hurt to meter the engine block with the volt test also.
Code 55 should be the only one.
Mike
Joe_M wrote:
> Mike,
>
> No codes on OBD II. I get codes 12 and 55 on the odometer and have for
> months. I was told previously that code 12 always shows and is not an
> indicator of a problem, even though it does not disappear after many start
> cycles. Was I told wrong?
>
> I had cleaned and reseated both the negative to body ground and the negative
> to engine ground before the latest problem. I have not run the specific test
> you mention. I will when I next get access to the car.
>
> Thanks,
>
> Joe M
>
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:4694d725$0$10412$9a6e19ea@unlimited.newshosti ng.com...
>> You are still describing a code 12 issue I think.....
>>
>> I would be making 'really' sure the body of the vehicle had full power.
>>
>> To do this, I take a multimeter and read the volts at the battery posts
>> with the engine running and the headlights and heater fan and wipers on. I
>> then move the negative meter probe to the body with the positive still on
>> the battery positive and compare the voltages.
>>
>> If the voltages are different, your body ground path is bad.
>>
>> Good luck!
>>
>> Mike
>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>> 88 Cherokee 235 BFG AT's - Gone to the rust pile...
>> Canadian Off Road Trips Photos: Non members can still view!
>> Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
>> (More Off Road album links at bottom of the view page)
>
>
07-11-2007, 05:16 PM
#19
Guest
Posts: n/a
Re: '97 Grand fuel pump relay killed fuel pump?
Sometimes the cables can rot inside the clamps which is why the meter
test is a good one just to make sure.
It wouldn't hurt to meter the engine block with the volt test also.
Code 55 should be the only one.
Mike
Joe_M wrote:
> Mike,
>
> No codes on OBD II. I get codes 12 and 55 on the odometer and have for
> months. I was told previously that code 12 always shows and is not an
> indicator of a problem, even though it does not disappear after many start
> cycles. Was I told wrong?
>
> I had cleaned and reseated both the negative to body ground and the negative
> to engine ground before the latest problem. I have not run the specific test
> you mention. I will when I next get access to the car.
>
> Thanks,
>
> Joe M
>
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:4694d725$0$10412$9a6e19ea@unlimited.newshosti ng.com...
>> You are still describing a code 12 issue I think.....
>>
>> I would be making 'really' sure the body of the vehicle had full power.
>>
>> To do this, I take a multimeter and read the volts at the battery posts
>> with the engine running and the headlights and heater fan and wipers on. I
>> then move the negative meter probe to the body with the positive still on
>> the battery positive and compare the voltages.
>>
>> If the voltages are different, your body ground path is bad.
>>
>> Good luck!
>>
>> Mike
>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>> 88 Cherokee 235 BFG AT's - Gone to the rust pile...
>> Canadian Off Road Trips Photos: Non members can still view!
>> Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
>> (More Off Road album links at bottom of the view page)
>
>
test is a good one just to make sure.
It wouldn't hurt to meter the engine block with the volt test also.
Code 55 should be the only one.
Mike
Joe_M wrote:
> Mike,
>
> No codes on OBD II. I get codes 12 and 55 on the odometer and have for
> months. I was told previously that code 12 always shows and is not an
> indicator of a problem, even though it does not disappear after many start
> cycles. Was I told wrong?
>
> I had cleaned and reseated both the negative to body ground and the negative
> to engine ground before the latest problem. I have not run the specific test
> you mention. I will when I next get access to the car.
>
> Thanks,
>
> Joe M
>
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:4694d725$0$10412$9a6e19ea@unlimited.newshosti ng.com...
>> You are still describing a code 12 issue I think.....
>>
>> I would be making 'really' sure the body of the vehicle had full power.
>>
>> To do this, I take a multimeter and read the volts at the battery posts
>> with the engine running and the headlights and heater fan and wipers on. I
>> then move the negative meter probe to the body with the positive still on
>> the battery positive and compare the voltages.
>>
>> If the voltages are different, your body ground path is bad.
>>
>> Good luck!
>>
>> Mike
>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>> 88 Cherokee 235 BFG AT's - Gone to the rust pile...
>> Canadian Off Road Trips Photos: Non members can still view!
>> Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
>> (More Off Road album links at bottom of the view page)
>
>
07-11-2007, 05:16 PM
#20
Guest
Posts: n/a
Re: '97 Grand fuel pump relay killed fuel pump?
Sometimes the cables can rot inside the clamps which is why the meter
test is a good one just to make sure.
It wouldn't hurt to meter the engine block with the volt test also.
Code 55 should be the only one.
Mike
Joe_M wrote:
> Mike,
>
> No codes on OBD II. I get codes 12 and 55 on the odometer and have for
> months. I was told previously that code 12 always shows and is not an
> indicator of a problem, even though it does not disappear after many start
> cycles. Was I told wrong?
>
> I had cleaned and reseated both the negative to body ground and the negative
> to engine ground before the latest problem. I have not run the specific test
> you mention. I will when I next get access to the car.
>
> Thanks,
>
> Joe M
>
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:4694d725$0$10412$9a6e19ea@unlimited.newshosti ng.com...
>> You are still describing a code 12 issue I think.....
>>
>> I would be making 'really' sure the body of the vehicle had full power.
>>
>> To do this, I take a multimeter and read the volts at the battery posts
>> with the engine running and the headlights and heater fan and wipers on. I
>> then move the negative meter probe to the body with the positive still on
>> the battery positive and compare the voltages.
>>
>> If the voltages are different, your body ground path is bad.
>>
>> Good luck!
>>
>> Mike
>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>> 88 Cherokee 235 BFG AT's - Gone to the rust pile...
>> Canadian Off Road Trips Photos: Non members can still view!
>> Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
>> (More Off Road album links at bottom of the view page)
>
>
test is a good one just to make sure.
It wouldn't hurt to meter the engine block with the volt test also.
Code 55 should be the only one.
Mike
Joe_M wrote:
> Mike,
>
> No codes on OBD II. I get codes 12 and 55 on the odometer and have for
> months. I was told previously that code 12 always shows and is not an
> indicator of a problem, even though it does not disappear after many start
> cycles. Was I told wrong?
>
> I had cleaned and reseated both the negative to body ground and the negative
> to engine ground before the latest problem. I have not run the specific test
> you mention. I will when I next get access to the car.
>
> Thanks,
>
> Joe M
>
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:4694d725$0$10412$9a6e19ea@unlimited.newshosti ng.com...
>> You are still describing a code 12 issue I think.....
>>
>> I would be making 'really' sure the body of the vehicle had full power.
>>
>> To do this, I take a multimeter and read the volts at the battery posts
>> with the engine running and the headlights and heater fan and wipers on. I
>> then move the negative meter probe to the body with the positive still on
>> the battery positive and compare the voltages.
>>
>> If the voltages are different, your body ground path is bad.
>>
>> Good luck!
>>
>> Mike
>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>> 88 Cherokee 235 BFG AT's - Gone to the rust pile...
>> Canadian Off Road Trips Photos: Non members can still view!
>> Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
>> (More Off Road album links at bottom of the view page)
>
>