BroncoII4x4.com

I just started up this Bronco II after getting it 2 years ago.
The temp guage does not move at all even after 10 miles of driving. Other gauges work normally.Temp seems ok so I need to find out why the gauge doesn't indicate anything.
I've never had to troubleshoot a gauge. How do I tell if its the sender, the gauge or something else?

Thanks, Steve

Unplug the wire from the temp sending unit and ground the wire. That should cause the guage to peg. If it doesn't peg then there is a break in the wire or the guage is bad.

Thanks nobody! Al.

I had the same thing. I replaced the sending unit that screws in at the front/top of the motor. Wasn't very expensive, and works fine now.

CraigK

Same thing was happening to me a while ago. After I over-heated it it has worked ever since.

My sending unit worked but the gauge on dash would randomly show major overheating, yet the radiator wasn't boiling excessive. I was panicking since I just put in a now longblock a year earlier.

I had a radiator mechanic use an Infer-red gun, measure all points of cooling system. He came back with the famous... cant get it to overheat.. 5 minutes from leaving shop, it was showing overheated..eventhough i just had the mech change out the sensor on engine. He tried to blame it on the lack of a substantial fan shroud. My truck has the stock blade protector only. (no ac or auto trans).

I added a fancy (chrome) radiator cap that had a temp guage, and a mechnical temp guage system. As i discovered, It's rare that I even hit 195f setting for themostat to open.

Without auto transmision or AC the cooling loads for a 2.9 is minimal. General air flow and minor flow through the thermostat pinhole keeps the engine cooled. Ran all summer +100 without a problem.

Good luck