Question about 1985 Jeep CJ7

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Need to know what wires go where on my 78 cj7 fuel and temp gauge?

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Fuel wire goes to the Gas Tank and Temp gauge goes to the thermostat located near the end of water pipe from radiator.

Posted on Sep 06, 2009

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Posted on Jan 02, 2017

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Installing temperature gauge 1999 Mustang 3.8L


Congrats. Sarcasm is free.
I didn't see a question, so let's play the guessing game.

Air temp?
Water temp?
Oil temp?
Trans temp?
Your temp?

Do you need to know how to mount a gauge to the dash?
Do you need to know where to run the power wire for gauge light?
Do you need to know where to install the sensor on intake and or engine?
Do you need to borrow some tools?

I feel better after unloading sarcasm.

Now, I'm going to assume it's water temp.

if it's electronic, you can just remove the stock sensor wire from on/near the waterneck/thermostat housing and plug in the new wire.

If it's mechanical, you will need to install the new probe into a port where it can contact the water.

On my old 3.8 (1997) I changed to an aftermarket waterneck that had a spot to screw in a temp probe.

On my 2003 gt, I haven't upgraded gauges yet, but the water sensor is on the front passenger side of the intake. I will add a pic of my gt so you can see the placement.

With this type, you can just add your wires to it (splice them in) and keep both the stock gauge & the aftermarket.
Or just remove the stock wire, then the stock sensor, then install the new stuff.
it's the black wire near the alternator. (almost center right of the pic to the right of the pink fuel injector)

1_20_2013_6_43_49_pm.jpg

Jan 20, 2013 | Cars & Trucks

1 Answer

I need help with wiring the fuel gauge on the speedometer assembly for my 1975 jeep CJ7


feed from ballast resistor to gauge then on to tank sensor and it earths back through the tank ,its metal on these real good old motors ,make sure the earth is good to the tank though

Mar 18, 2010 | Jeep Comanche Cars & Trucks

1 Answer

Both fuel gauge and temp gauge have stopped working


check your wires to see if they have been pierced by a screw or whatnot, if you have done any work to the car recheck all the screws to see if you screwed them through. If thats not the case, the next easiest step would be to pull your gauge cluster off and make sure the connections havent become dislodged on the backside.

Sep 22, 2009 | 1984 Jeep CJ7

1 Answer

Fuel and temp sensor problem toyota corolla two door 1989


Find the temperature sensor(usually around the thermostat housing)'disconnect connector and ground it with a test light. Observe the inside gauge. It should slowly go up. If so, change sensor. Do the same for the fuel gauge located on the fuel tank. If gauge move to fill as you groung the sending unit wire, change sending unit. Test the right wire. Ask for further assistance.

Jun 11, 2009 | 1989 Toyota Corolla 2 Door

1 Answer

Fuel gauge/temp gauge not working


There are two sensors, one for ECU temp. readings with two pin connector and other one with only one wire, which has been probably disconnected when you replaced the CPC solenoid - very close position.

May 31, 2009 | 1992 Subaru Legacy

1 Answer

1980 CJ 7 Fuel gauge/ sending unit issues


there is a lead that you must be missing. but given its age, i would run a new wire. the gage should have 3 wires out the back. positive , negative, and the signal wire.

May 27, 2009 | 1983 Jeep CJ7

1 Answer

Temp gauge hook up late 70s cj7 258 6cylinder


Wherever you can find a threaded port in the cooling system should work,as long as it is the same thread as your sending unit.If you cannot find a compatible threaded port,you may have to go to a hardware store and find some fittings that will adapt your sending unit to whatever threaded port is available.If you can not find one,most engine blocks have two (one on each side) threaded plugs for the water jacket.If you have to,locate the sending unit there with appropriate adapters.And as a last resort,you could purchase an aftermarket temp gauge and use it,as it comes with an assortment of adapters/fittings.

Jul 19, 2008 | Jeep CJ7 Cars & Trucks

1 Answer

78 304 cj7


The diesel prob is carbon build-up. Replace the sparkplugs, check that the exhaust is not blocked. Check for spark and fuel if it still won't start. A simple way to clean the carbon out is to get the engine up to operating temp, remove the breather and with the engine running at about 1000rpm carefully feed it clean water down the intake. Don't over-do it! A drink bottle works great, but just a bit at a time! You will see quite a lot of dirt come out the exhaust. Put the breather back on and take it for a rip! Frankster016

Jun 15, 2008 | 1983 Jeep CJ7

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