Fuel Gauge Inaccurate (Single Tank)
- Disconnect IPC connector. Connect fused jumper wire between IPC terminal No. 22 (Pink wire) and voltage. Install another fused jumper wire between IPC terminal No. 31 (Black wire) and ground. Connect one Red lead of Instrument Panel Tester (J33431-B) to IPC terminal No. 16 (Purple wire). Connect other Red lead to ground.
- Set resistance dial to zero ohms. Fuel gauge should indicate "E" or below. Set resistance to 90 ohms. After a short period, gauge should indicate "F" or above. If fuel gauge does not operate as specified, replace IPC. If fuel gauge does operate as specified, go to next step.
- Remove fused jumper wire between voltage and IPC. Install a fused jumper wire between ground and IPC. Reconnect IPC connector. Disconnect fuel gauge sender connector. Connect one Red test lead to fuel gauge sender terminal "B" (Purple wire). Connect other Red test lead to ground. Set resistance dial to zero ohms, then to 90 ohms. If fuel gauge does not operate, locate and repair high resistance in Purple wire between IPC and fuel gauge sender. If fuel gauge does operate, go to next step.
- Reconnect tester between fuel gauge sender terminals "B" (Purple wire) and "A" (Black/White wire). Set resistance dial to zero ohms, then to 90 ohms. If fuel gauge operates, replace fuel gauge sender. If fuel gauge does not operate, locate and repair high resistance in Black/White wire between fuel gauge sender and ground.