The VTM-4 Indicator Does Not Come on

The VTM-4 indicator does not come on
1. Turn the ignition switch ON (II), and check for operation of all gauge assembly indicators.
Do the indicators come on?
YES - Go to step 2.
NO - Check for open or short in the power and ground circuits in the gauge assembly.

2. Disconnect the A (22P) and B (12P) connectors from the VTM-4 control unit.
3. Turn the ignition switch ON (II).





4. Connect the A14 or B11 terminals of the VTM-4 control unit to body ground with a jumper wire, and watch the VTM-4 indicator.
Does the VTM-4 indicator come on?
YES - Check for loose terminal fit in the VTM-4 control unit connectors. If it is normal, replace the VTM-4 control unit.
NO - Go to step 5.

5. Turn the ignition switch OFF.
6. Disconnect connector A (30P) from the gauge assembly.





7. Connect the C3 terminal of the gauge assembly to body ground with a jumper wire, then check for continuity between the A14 and B11 terminals of the VTM-4 control unit and body ground.
Is there continuity'?
YES - Check for a blown bulb in the VTM-4 indicator or a problem in the gauge assembly.
NO - Repair open in the wire between the C3 terminal of the gauge assembly and the driver's under-dash fuse/relay box.