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Q:

where is the instrument voltage regulator on 1990 Chevrolet Lumina APV

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
all the gauges are out of wack
(1) Answer
Customer Concern: Tachometer, speedometer and voltmeter are dead. Fuel gauge is stuck at 1/2 full. Oil pressure and coolant temperature gauges work correctly.
Tests/Procedures: 1. Verify the GAUGES and the IGN fuse are good and have 12v across them with the ignition on.

2. Remove the Instrument Panel Cluster (IPC). With the ignition on, verify there is power at terminals C5, D5 and D10.

3. Check for good grounds at terminals C7, C8 and D8. If necessary, check the ground G200 located at the base of the A pillar.

4. If good, replace the IPC.
Potential Causes: Instrument Panel Cluster (IPC)
Instrument Panel Cluster (IPC) Circuit