Fuel Level Indicator (Bimetal)
- Disconnect wiring connector from terminals at sender unit. Check terminals for possible corrosion or undercoating and clean as necessary. Connect 12-volt test light, or positive lead of voltmeter to lead which was disconnected from sender.
- Connect other test lead to a good known ground. With ignition on, a flashing light or fluctuating voltmeter will indicate instrument voltage regulator is operating and that gauge indicator circuit is not open.
- If light stays on, or voltage reading is steady, replace Instrument Voltage Regulator (IVR). If no voltage is indicated by meter or test light, check IVR for proper ground, or open circuit across IVR.
NOTE:
Magnetic-type gauges do not require an Instrument Voltage Regulator (IVR).