Blog - Jeep Gauges Not Working

If your Jeep gauges aren’t working, that’s a problem. You need the use of your gauges to monitor the current conditions of your driving, the state of the vehicle and any problems which may arise. Use this guide to diagnose common gauge problems.

The Problem: Coolant Temperature Gauge Reads Incorrectly or Not at All

The Fix:

Clean and tighten the connections

Remove the wire from sending unit, ground the wire for an instant. If gauge registers, replace sending unit

Disconnect the wiring for the sending unit and ground the wire. Gauge should read hot. If not, the gauge is defective

The Problem: Voltage Gauge Reads Incorrectly or Not at All

The Fix:

Make sure connections aren’t reversed and fix if needed

Check for loose connections

The Problem: Oil Pressure Gauge Reads Incorrectly or Not at All

The Fix:

Check tube for kinks that may be preventing oil from reaching the gauge

Remove the sending unit. If no oil flows from the sending unit hole, the problem is with the engine

Remove the wire from the sending unit and ground — if the gauge is working it will go all the way up

Check the wiring for the gauge with an ohmmeter to make sure it’s registering. If not, replace gauge

The Problem: All Gauges Are Not Operating Properly

The Fix:

Check the fuse for the cluster and replace if blown

Clean contacts on the instrument voltage regulator

Replace instrument voltage regulator

The Problem: Warning Lights Are On/Off When They’re Not Supposed to Be

The Fix:

If the warning lights are not coming on when the ignition is in the “On” position, replace bulbs

If the warning lights are on, it’s usually a problem with the system and ECM will need to be scanned

If no such problems exist but the warning lights are on, check the sending unit