I have a 92 jeep wrangler. I just changed my heater core and I’ve noticed my fuel and temperature gauges do not move. Fuel is full and temperature is at 0. Help.
Gauges
- Thread starter Soccer180018
- Start date
It's possible that some wires were inadvertently disconnected or damaged during the heater core replacement. Inspect the wiring harness connected to the instrument cluster and ensure everything is securely plugged in.
Make sure that the ground connections for the gauges are intact. A poor ground can cause the gauges to read incorrectly or not at all.
If the above doesn't resolve the issue, consider removing the gauge cluster and checking for any loose connections or issues on the circuit board itself.
And finally, the temperature gauge might be faulty. If it’s not sending the correct signals, your gauge may not read properly.
Flyer58
YJ Addict
The fuel gauge on the YJ will read full if it has power but the sensor wire from the tank is not connected. If it was grounded it would drop to zero. If you can get to the plug back by the fuel pump you can short out the black ground wire and the middle wire in the plug, I think it's brown. The other wire is to power the fuel pump. Shorting the black and middle wire simulates no resistance from the tank sender and will drive the needle to empty, not shorted will drive the needle to full.
The Temperature sensor is located on the cylinder head back next to the last head bolt on the left side near the firewall. Very close to one of the nuts you removed when taking out the heater core box. There's a very good chance you knocked off the wire, or as in my case, broke off the top of the sensor.
The Temperature sensor is located on the cylinder head back next to the last head bolt on the left side near the firewall. Very close to one of the nuts you removed when taking out the heater core box. There's a very good chance you knocked off the wire, or as in my case, broke off the top of the sensor.