Stevecop Posted February 4, 2019 Share Posted February 4, 2019 Gas gauge on my 89 Comanche is stuck on full. Any ideas on how I can un-stick it or what I should check to fix the problem. Link to comment Share on other sites More sharing options...
rylee144 Posted February 4, 2019 Share Posted February 4, 2019 I had a fuse out. Works fine now. Link to comment Share on other sites More sharing options...
Stevecop Posted February 5, 2019 Author Share Posted February 5, 2019 Was the fuse labeled on the fuse block or is it under another item such as dome light, gauges etc. Mine is 1989 Pioneer model with 4.0 6 cyl. Do you if there are any fuses under the hood. Link to comment Share on other sites More sharing options...
Eagle Posted February 5, 2019 Share Posted February 5, 2019 FSM troubleshooting for gas gauge: Ignition in RUN position Disconnect C139 ... Needle should go to F(ull). If not ... Connect C139. Place ohmmeter on C203. Resistance should indicate between 0 and 88 ohms. (0 if tank is empty, 88 if tank is full.) C139 is the connector at the back of the vehicle, where the pigtails from the fuel pump and sender connect. C203 is where the sensors plug into the cluster. The feed for the fuel gauge is the tan wire. Link to comment Share on other sites More sharing options...
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