how to fix a low reading temp gauge on a cj
12-01-2003, 02:28 AM
#1
Guest
Posts: n/a
how to fix a low reading temp gauge on a cj
I finally got my temp gauge working on my 86 cj7 with a fiberglass body.
after reading the article on http://www.jeeptech.com/electrical/gauges/
about the gauges I figured out how to fix a low reading temp gauge. after
testing the temp sending unit in the block it seemed that the resistance was
a little higher than it should be according to the articles in jeepteck . so
I bought a new sending unit and tested resistance and it also was higher
than it was suppose to be. then when I checked the temp gauge in the dash
with resistance the needle was showing a lower reading than what it should
be. so with the combination of a high resistance sending unit and a gauge
that was reading low. when I ran the jeep the needle barley got off the cold
side of the gauge. so to get the needle to read higher on the gauge I put 3
10 ohm resistors from the post on the back of the temp gauge to ground. all
this is doing is running in series with the temperature sending unit to make
the resistance lower. carmine
after reading the article on http://www.jeeptech.com/electrical/gauges/
about the gauges I figured out how to fix a low reading temp gauge. after
testing the temp sending unit in the block it seemed that the resistance was
a little higher than it should be according to the articles in jeepteck . so
I bought a new sending unit and tested resistance and it also was higher
than it was suppose to be. then when I checked the temp gauge in the dash
with resistance the needle was showing a lower reading than what it should
be. so with the combination of a high resistance sending unit and a gauge
that was reading low. when I ran the jeep the needle barley got off the cold
side of the gauge. so to get the needle to read higher on the gauge I put 3
10 ohm resistors from the post on the back of the temp gauge to ground. all
this is doing is running in series with the temperature sending unit to make
the resistance lower. carmine
12-02-2003, 08:15 AM
#2
Guest
Posts: n/a
Re: how to fix a low reading temp gauge on a cj
"Jet" <jet@bestweb.net> wrote in message news:<vslo66289cd316@corp.supernews.com>...
Hope this fixed it. My daughter with the purple hair had a low
reading temperature on her car because the block was full of air
instead of coolant. Turned out to be a bad water pump. Motor would
expand the coolant when running and it would overflow into the bottle,
but when cooled instead of sucking back the coolant it would suck air
around the bearing on the water pump. Ruined a head.
> I finally got my temp gauge working on my 86 cj7 with a fiberglass body.
> after reading the article on http://www.jeeptech.com/electrical/gauges/
> about the gauges I figured out how to fix a low reading temp gauge. after
> testing the temp sending unit in the block it seemed that the resistance was
> a little higher than it should be according to the articles in jeepteck . so
> I bought a new sending unit and tested resistance and it also was higher
> than it was suppose to be. then when I checked the temp gauge in the dash
> with resistance the needle was showing a lower reading than what it should
> be. so with the combination of a high resistance sending unit and a gauge
> that was reading low. when I ran the jeep the needle barley got off the cold
> side of the gauge. so to get the needle to read higher on the gauge I put 3
> 10 ohm resistors from the post on the back of the temp gauge to ground. all
> this is doing is running in series with the temperature sending unit to make
> the resistance lower. carmine
Hope this fixed it. My daughter with the purple hair had a low
reading temperature on her car because the block was full of air
instead of coolant. Turned out to be a bad water pump. Motor would
expand the coolant when running and it would overflow into the bottle,
but when cooled instead of sucking back the coolant it would suck air
around the bearing on the water pump. Ruined a head.
> I finally got my temp gauge working on my 86 cj7 with a fiberglass body.
> after reading the article on http://www.jeeptech.com/electrical/gauges/
> about the gauges I figured out how to fix a low reading temp gauge. after
> testing the temp sending unit in the block it seemed that the resistance was
> a little higher than it should be according to the articles in jeepteck . so
> I bought a new sending unit and tested resistance and it also was higher
> than it was suppose to be. then when I checked the temp gauge in the dash
> with resistance the needle was showing a lower reading than what it should
> be. so with the combination of a high resistance sending unit and a gauge
> that was reading low. when I ran the jeep the needle barley got off the cold
> side of the gauge. so to get the needle to read higher on the gauge I put 3
> 10 ohm resistors from the post on the back of the temp gauge to ground. all
> this is doing is running in series with the temperature sending unit to make
> the resistance lower. carmine
12-02-2003, 08:15 AM
#3
Guest
Posts: n/a
Re: how to fix a low reading temp gauge on a cj
"Jet" <jet@bestweb.net> wrote in message news:<vslo66289cd316@corp.supernews.com>...
Hope this fixed it. My daughter with the purple hair had a low
reading temperature on her car because the block was full of air
instead of coolant. Turned out to be a bad water pump. Motor would
expand the coolant when running and it would overflow into the bottle,
but when cooled instead of sucking back the coolant it would suck air
around the bearing on the water pump. Ruined a head.
> I finally got my temp gauge working on my 86 cj7 with a fiberglass body.
> after reading the article on http://www.jeeptech.com/electrical/gauges/
> about the gauges I figured out how to fix a low reading temp gauge. after
> testing the temp sending unit in the block it seemed that the resistance was
> a little higher than it should be according to the articles in jeepteck . so
> I bought a new sending unit and tested resistance and it also was higher
> than it was suppose to be. then when I checked the temp gauge in the dash
> with resistance the needle was showing a lower reading than what it should
> be. so with the combination of a high resistance sending unit and a gauge
> that was reading low. when I ran the jeep the needle barley got off the cold
> side of the gauge. so to get the needle to read higher on the gauge I put 3
> 10 ohm resistors from the post on the back of the temp gauge to ground. all
> this is doing is running in series with the temperature sending unit to make
> the resistance lower. carmine
Hope this fixed it. My daughter with the purple hair had a low
reading temperature on her car because the block was full of air
instead of coolant. Turned out to be a bad water pump. Motor would
expand the coolant when running and it would overflow into the bottle,
but when cooled instead of sucking back the coolant it would suck air
around the bearing on the water pump. Ruined a head.
> I finally got my temp gauge working on my 86 cj7 with a fiberglass body.
> after reading the article on http://www.jeeptech.com/electrical/gauges/
> about the gauges I figured out how to fix a low reading temp gauge. after
> testing the temp sending unit in the block it seemed that the resistance was
> a little higher than it should be according to the articles in jeepteck . so
> I bought a new sending unit and tested resistance and it also was higher
> than it was suppose to be. then when I checked the temp gauge in the dash
> with resistance the needle was showing a lower reading than what it should
> be. so with the combination of a high resistance sending unit and a gauge
> that was reading low. when I ran the jeep the needle barley got off the cold
> side of the gauge. so to get the needle to read higher on the gauge I put 3
> 10 ohm resistors from the post on the back of the temp gauge to ground. all
> this is doing is running in series with the temperature sending unit to make
> the resistance lower. carmine
12-02-2003, 08:15 AM
#4
Guest
Posts: n/a
Re: how to fix a low reading temp gauge on a cj
"Jet" <jet@bestweb.net> wrote in message news:<vslo66289cd316@corp.supernews.com>...
Hope this fixed it. My daughter with the purple hair had a low
reading temperature on her car because the block was full of air
instead of coolant. Turned out to be a bad water pump. Motor would
expand the coolant when running and it would overflow into the bottle,
but when cooled instead of sucking back the coolant it would suck air
around the bearing on the water pump. Ruined a head.
> I finally got my temp gauge working on my 86 cj7 with a fiberglass body.
> after reading the article on http://www.jeeptech.com/electrical/gauges/
> about the gauges I figured out how to fix a low reading temp gauge. after
> testing the temp sending unit in the block it seemed that the resistance was
> a little higher than it should be according to the articles in jeepteck . so
> I bought a new sending unit and tested resistance and it also was higher
> than it was suppose to be. then when I checked the temp gauge in the dash
> with resistance the needle was showing a lower reading than what it should
> be. so with the combination of a high resistance sending unit and a gauge
> that was reading low. when I ran the jeep the needle barley got off the cold
> side of the gauge. so to get the needle to read higher on the gauge I put 3
> 10 ohm resistors from the post on the back of the temp gauge to ground. all
> this is doing is running in series with the temperature sending unit to make
> the resistance lower. carmine
Hope this fixed it. My daughter with the purple hair had a low
reading temperature on her car because the block was full of air
instead of coolant. Turned out to be a bad water pump. Motor would
expand the coolant when running and it would overflow into the bottle,
but when cooled instead of sucking back the coolant it would suck air
around the bearing on the water pump. Ruined a head.
> I finally got my temp gauge working on my 86 cj7 with a fiberglass body.
> after reading the article on http://www.jeeptech.com/electrical/gauges/
> about the gauges I figured out how to fix a low reading temp gauge. after
> testing the temp sending unit in the block it seemed that the resistance was
> a little higher than it should be according to the articles in jeepteck . so
> I bought a new sending unit and tested resistance and it also was higher
> than it was suppose to be. then when I checked the temp gauge in the dash
> with resistance the needle was showing a lower reading than what it should
> be. so with the combination of a high resistance sending unit and a gauge
> that was reading low. when I ran the jeep the needle barley got off the cold
> side of the gauge. so to get the needle to read higher on the gauge I put 3
> 10 ohm resistors from the post on the back of the temp gauge to ground. all
> this is doing is running in series with the temperature sending unit to make
> the resistance lower. carmine
12-02-2003, 02:17 PM
#5
Guest
Posts: n/a
Re: how to fix a low reading temp gauge on a cj
Mine usually reads low, but so does my gas gauge.
The voltage regulator in the gas gauge on mine is bad. It is only
putting out 3 volts instead of 5 'usually'. Though yesterday it decided
to work perfectly.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Jet wrote:
>
> I finally got my temp gauge working on my 86 cj7 with a fiberglass body.
> after reading the article on http://www.jeeptech.com/electrical/gauges/
> about the gauges I figured out how to fix a low reading temp gauge. after
> testing the temp sending unit in the block it seemed that the resistance was
> a little higher than it should be according to the articles in jeepteck . so
> I bought a new sending unit and tested resistance and it also was higher
> than it was suppose to be. then when I checked the temp gauge in the dash
> with resistance the needle was showing a lower reading than what it should
> be. so with the combination of a high resistance sending unit and a gauge
> that was reading low. when I ran the jeep the needle barley got off the cold
> side of the gauge. so to get the needle to read higher on the gauge I put 3
> 10 ohm resistors from the post on the back of the temp gauge to ground. all
> this is doing is running in series with the temperature sending unit to make
> the resistance lower. carmine
The voltage regulator in the gas gauge on mine is bad. It is only
putting out 3 volts instead of 5 'usually'. Though yesterday it decided
to work perfectly.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Jet wrote:
>
> I finally got my temp gauge working on my 86 cj7 with a fiberglass body.
> after reading the article on http://www.jeeptech.com/electrical/gauges/
> about the gauges I figured out how to fix a low reading temp gauge. after
> testing the temp sending unit in the block it seemed that the resistance was
> a little higher than it should be according to the articles in jeepteck . so
> I bought a new sending unit and tested resistance and it also was higher
> than it was suppose to be. then when I checked the temp gauge in the dash
> with resistance the needle was showing a lower reading than what it should
> be. so with the combination of a high resistance sending unit and a gauge
> that was reading low. when I ran the jeep the needle barley got off the cold
> side of the gauge. so to get the needle to read higher on the gauge I put 3
> 10 ohm resistors from the post on the back of the temp gauge to ground. all
> this is doing is running in series with the temperature sending unit to make
> the resistance lower. carmine
12-02-2003, 02:17 PM
#6
Guest
Posts: n/a
Re: how to fix a low reading temp gauge on a cj
Mine usually reads low, but so does my gas gauge.
The voltage regulator in the gas gauge on mine is bad. It is only
putting out 3 volts instead of 5 'usually'. Though yesterday it decided
to work perfectly.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Jet wrote:
>
> I finally got my temp gauge working on my 86 cj7 with a fiberglass body.
> after reading the article on http://www.jeeptech.com/electrical/gauges/
> about the gauges I figured out how to fix a low reading temp gauge. after
> testing the temp sending unit in the block it seemed that the resistance was
> a little higher than it should be according to the articles in jeepteck . so
> I bought a new sending unit and tested resistance and it also was higher
> than it was suppose to be. then when I checked the temp gauge in the dash
> with resistance the needle was showing a lower reading than what it should
> be. so with the combination of a high resistance sending unit and a gauge
> that was reading low. when I ran the jeep the needle barley got off the cold
> side of the gauge. so to get the needle to read higher on the gauge I put 3
> 10 ohm resistors from the post on the back of the temp gauge to ground. all
> this is doing is running in series with the temperature sending unit to make
> the resistance lower. carmine
The voltage regulator in the gas gauge on mine is bad. It is only
putting out 3 volts instead of 5 'usually'. Though yesterday it decided
to work perfectly.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Jet wrote:
>
> I finally got my temp gauge working on my 86 cj7 with a fiberglass body.
> after reading the article on http://www.jeeptech.com/electrical/gauges/
> about the gauges I figured out how to fix a low reading temp gauge. after
> testing the temp sending unit in the block it seemed that the resistance was
> a little higher than it should be according to the articles in jeepteck . so
> I bought a new sending unit and tested resistance and it also was higher
> than it was suppose to be. then when I checked the temp gauge in the dash
> with resistance the needle was showing a lower reading than what it should
> be. so with the combination of a high resistance sending unit and a gauge
> that was reading low. when I ran the jeep the needle barley got off the cold
> side of the gauge. so to get the needle to read higher on the gauge I put 3
> 10 ohm resistors from the post on the back of the temp gauge to ground. all
> this is doing is running in series with the temperature sending unit to make
> the resistance lower. carmine
12-02-2003, 02:17 PM
#7
Guest
Posts: n/a
Re: how to fix a low reading temp gauge on a cj
Mine usually reads low, but so does my gas gauge.
The voltage regulator in the gas gauge on mine is bad. It is only
putting out 3 volts instead of 5 'usually'. Though yesterday it decided
to work perfectly.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Jet wrote:
>
> I finally got my temp gauge working on my 86 cj7 with a fiberglass body.
> after reading the article on http://www.jeeptech.com/electrical/gauges/
> about the gauges I figured out how to fix a low reading temp gauge. after
> testing the temp sending unit in the block it seemed that the resistance was
> a little higher than it should be according to the articles in jeepteck . so
> I bought a new sending unit and tested resistance and it also was higher
> than it was suppose to be. then when I checked the temp gauge in the dash
> with resistance the needle was showing a lower reading than what it should
> be. so with the combination of a high resistance sending unit and a gauge
> that was reading low. when I ran the jeep the needle barley got off the cold
> side of the gauge. so to get the needle to read higher on the gauge I put 3
> 10 ohm resistors from the post on the back of the temp gauge to ground. all
> this is doing is running in series with the temperature sending unit to make
> the resistance lower. carmine
The voltage regulator in the gas gauge on mine is bad. It is only
putting out 3 volts instead of 5 'usually'. Though yesterday it decided
to work perfectly.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Jet wrote:
>
> I finally got my temp gauge working on my 86 cj7 with a fiberglass body.
> after reading the article on http://www.jeeptech.com/electrical/gauges/
> about the gauges I figured out how to fix a low reading temp gauge. after
> testing the temp sending unit in the block it seemed that the resistance was
> a little higher than it should be according to the articles in jeepteck . so
> I bought a new sending unit and tested resistance and it also was higher
> than it was suppose to be. then when I checked the temp gauge in the dash
> with resistance the needle was showing a lower reading than what it should
> be. so with the combination of a high resistance sending unit and a gauge
> that was reading low. when I ran the jeep the needle barley got off the cold
> side of the gauge. so to get the needle to read higher on the gauge I put 3
> 10 ohm resistors from the post on the back of the temp gauge to ground. all
> this is doing is running in series with the temperature sending unit to make
> the resistance lower. carmine
12-02-2003, 03:23 PM
#8
Guest
Posts: n/a
Re: how to fix a low reading temp gauge on a cj
I'm betting the head blew first.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
John Welch wrote:
>
> "Jet" <jet@bestweb.net> wrote in message news:<vslo66289cd316@corp.supernews.com>...
> Hope this fixed it. My daughter with the purple hair had a low
> reading temperature on her car because the block was full of air
> instead of coolant. Turned out to be a bad water pump. Motor would
> expand the coolant when running and it would overflow into the bottle,
> but when cooled instead of sucking back the coolant it would suck air
> around the bearing on the water pump. Ruined a head.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
John Welch wrote:
>
> "Jet" <jet@bestweb.net> wrote in message news:<vslo66289cd316@corp.supernews.com>...
> Hope this fixed it. My daughter with the purple hair had a low
> reading temperature on her car because the block was full of air
> instead of coolant. Turned out to be a bad water pump. Motor would
> expand the coolant when running and it would overflow into the bottle,
> but when cooled instead of sucking back the coolant it would suck air
> around the bearing on the water pump. Ruined a head.
12-02-2003, 03:23 PM
#9
Guest
Posts: n/a
Re: how to fix a low reading temp gauge on a cj
I'm betting the head blew first.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
John Welch wrote:
>
> "Jet" <jet@bestweb.net> wrote in message news:<vslo66289cd316@corp.supernews.com>...
> Hope this fixed it. My daughter with the purple hair had a low
> reading temperature on her car because the block was full of air
> instead of coolant. Turned out to be a bad water pump. Motor would
> expand the coolant when running and it would overflow into the bottle,
> but when cooled instead of sucking back the coolant it would suck air
> around the bearing on the water pump. Ruined a head.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
John Welch wrote:
>
> "Jet" <jet@bestweb.net> wrote in message news:<vslo66289cd316@corp.supernews.com>...
> Hope this fixed it. My daughter with the purple hair had a low
> reading temperature on her car because the block was full of air
> instead of coolant. Turned out to be a bad water pump. Motor would
> expand the coolant when running and it would overflow into the bottle,
> but when cooled instead of sucking back the coolant it would suck air
> around the bearing on the water pump. Ruined a head.
12-02-2003, 03:23 PM
#10
Guest
Posts: n/a
Re: how to fix a low reading temp gauge on a cj
I'm betting the head blew first.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
John Welch wrote:
>
> "Jet" <jet@bestweb.net> wrote in message news:<vslo66289cd316@corp.supernews.com>...
> Hope this fixed it. My daughter with the purple hair had a low
> reading temperature on her car because the block was full of air
> instead of coolant. Turned out to be a bad water pump. Motor would
> expand the coolant when running and it would overflow into the bottle,
> but when cooled instead of sucking back the coolant it would suck air
> around the bearing on the water pump. Ruined a head.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
John Welch wrote:
>
> "Jet" <jet@bestweb.net> wrote in message news:<vslo66289cd316@corp.supernews.com>...
> Hope this fixed it. My daughter with the purple hair had a low
> reading temperature on her car because the block was full of air
> instead of coolant. Turned out to be a bad water pump. Motor would
> expand the coolant when running and it would overflow into the bottle,
> but when cooled instead of sucking back the coolant it would suck air
> around the bearing on the water pump. Ruined a head.
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