Within in the past week both the oil pressure gauge and coolant temp
gauge have gone from working correctly to pegging to the max as soon as
engine is started. I am guessing that something is grounding out,
causing the needles in the gauges to go to the max. I have noticed that
as I go over bumps in the road the gauges will intermittently work until
I hit the next bump. Both the gas gauge and the battery gauge continue
to work correctly. Can anyone direct me to where I should be looking
behind the dash to correct to correct this problem?

Thanks,
Ethan Jones
'89 4.2 Liter Wrangler

 

Yup, start pulling and pushing on your harnesses, until you find
the area the short is in.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Ethan Jones wrote:
>
> Within in the past week both the oil pressure gauge and coolant temp
> gauge have gone from working correctly to pegging to the max as soon as
> engine is started. I am guessing that something is grounding out,
> causing the needles in the gauges to go to the max. I have noticed that
> as I go over bumps in the road the gauges will intermittently work until
> I hit the next bump. Both the gas gauge and the battery gauge continue
> to work correctly. Can anyone direct me to where I should be looking
> behind the dash to correct to correct this problem?
>
> Thanks,
> Ethan Jones
> '89 4.2 Liter Wrangler

 

Yup, start pulling and pushing on your harnesses, until you find
the area the short is in.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Ethan Jones wrote:
>
> Within in the past week both the oil pressure gauge and coolant temp
> gauge have gone from working correctly to pegging to the max as soon as
> engine is started. I am guessing that something is grounding out,
> causing the needles in the gauges to go to the max. I have noticed that
> as I go over bumps in the road the gauges will intermittently work until
> I hit the next bump. Both the gas gauge and the battery gauge continue
> to work correctly. Can anyone direct me to where I should be looking
> behind the dash to correct to correct this problem?
>
> Thanks,
> Ethan Jones
> '89 4.2 Liter Wrangler

 

Yup, start pulling and pushing on your harnesses, until you find
the area the short is in.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Ethan Jones wrote:
>
> Within in the past week both the oil pressure gauge and coolant temp
> gauge have gone from working correctly to pegging to the max as soon as
> engine is started. I am guessing that something is grounding out,
> causing the needles in the gauges to go to the max. I have noticed that
> as I go over bumps in the road the gauges will intermittently work until
> I hit the next bump. Both the gas gauge and the battery gauge continue
> to work correctly. Can anyone direct me to where I should be looking
> behind the dash to correct to correct this problem?
>
> Thanks,
> Ethan Jones
> '89 4.2 Liter Wrangler

 

Ethan Jones did pass the time by typing:
> Within in the past week both the oil pressure gauge and coolant temp
> gauge have gone from working correctly to pegging to the max as soon as
> engine is started. I am guessing that something is grounding out,
> causing the needles in the gauges to go to the max. I have noticed that
> as I go over bumps in the road the gauges will intermittently work until
> I hit the next bump. Both the gas gauge and the battery gauge continue
> to work correctly. Can anyone direct me to where I should be looking
> behind the dash to correct to correct this problem?
>
> Thanks,
> Ethan Jones
> '89 4.2 Liter Wrangler

Not a short. Pegged = open. Read.
http://www.bc4x4.com/faqs/yj.cfm?cat=10&faqid=104
That might be your problem.

--
DougW

 

Ethan Jones did pass the time by typing:
> Within in the past week both the oil pressure gauge and coolant temp
> gauge have gone from working correctly to pegging to the max as soon as
> engine is started. I am guessing that something is grounding out,
> causing the needles in the gauges to go to the max. I have noticed that
> as I go over bumps in the road the gauges will intermittently work until
> I hit the next bump. Both the gas gauge and the battery gauge continue
> to work correctly. Can anyone direct me to where I should be looking
> behind the dash to correct to correct this problem?
>
> Thanks,
> Ethan Jones
> '89 4.2 Liter Wrangler

Not a short. Pegged = open. Read.
http://www.bc4x4.com/faqs/yj.cfm?cat=10&faqid=104
That might be your problem.

--
DougW

 

Ethan Jones did pass the time by typing:
> Within in the past week both the oil pressure gauge and coolant temp
> gauge have gone from working correctly to pegging to the max as soon as
> engine is started. I am guessing that something is grounding out,
> causing the needles in the gauges to go to the max. I have noticed that
> as I go over bumps in the road the gauges will intermittently work until
> I hit the next bump. Both the gas gauge and the battery gauge continue
> to work correctly. Can anyone direct me to where I should be looking
> behind the dash to correct to correct this problem?
>
> Thanks,
> Ethan Jones
> '89 4.2 Liter Wrangler

Not a short. Pegged = open. Read.
http://www.bc4x4.com/faqs/yj.cfm?cat=10&faqid=104
That might be your problem.

--
DougW

 

I would be checking the engine and tranny mounts out to make sure the
engine isn't trying to fall out.... That could stretch the wires going
to the temp and oil sensor maybe causing them both to come loose at the
same time.

Or maybe the circuit board behind the dash has issues with a ground
contact.

One other ground that can open now and then is is the mesh strap from
the engine to the firewall. Maybe worth a look.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Ethan Jones wrote:
>
> Within in the past week both the oil pressure gauge and coolant temp
> gauge have gone from working correctly to pegging to the max as soon as
> engine is started. I am guessing that something is grounding out,
> causing the needles in the gauges to go to the max. I have noticed that
> as I go over bumps in the road the gauges will intermittently work until
> I hit the next bump. Both the gas gauge and the battery gauge continue
> to work correctly. Can anyone direct me to where I should be looking
> behind the dash to correct to correct this problem?
>
> Thanks,
> Ethan Jones
> '89 4.2 Liter Wrangler

 

I would be checking the engine and tranny mounts out to make sure the
engine isn't trying to fall out.... That could stretch the wires going
to the temp and oil sensor maybe causing them both to come loose at the
same time.

Or maybe the circuit board behind the dash has issues with a ground
contact.

One other ground that can open now and then is is the mesh strap from
the engine to the firewall. Maybe worth a look.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Ethan Jones wrote:
>
> Within in the past week both the oil pressure gauge and coolant temp
> gauge have gone from working correctly to pegging to the max as soon as
> engine is started. I am guessing that something is grounding out,
> causing the needles in the gauges to go to the max. I have noticed that
> as I go over bumps in the road the gauges will intermittently work until
> I hit the next bump. Both the gas gauge and the battery gauge continue
> to work correctly. Can anyone direct me to where I should be looking
> behind the dash to correct to correct this problem?
>
> Thanks,
> Ethan Jones
> '89 4.2 Liter Wrangler

 

I would be checking the engine and tranny mounts out to make sure the
engine isn't trying to fall out.... That could stretch the wires going
to the temp and oil sensor maybe causing them both to come loose at the
same time.

Or maybe the circuit board behind the dash has issues with a ground
contact.

One other ground that can open now and then is is the mesh strap from
the engine to the firewall. Maybe worth a look.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Ethan Jones wrote:
>
> Within in the past week both the oil pressure gauge and coolant temp
> gauge have gone from working correctly to pegging to the max as soon as
> engine is started. I am guessing that something is grounding out,
> causing the needles in the gauges to go to the max. I have noticed that
> as I go over bumps in the road the gauges will intermittently work until
> I hit the next bump. Both the gas gauge and the battery gauge continue
> to work correctly. Can anyone direct me to where I should be looking
> behind the dash to correct to correct this problem?
>
> Thanks,
> Ethan Jones
> '89 4.2 Liter Wrangler