The VTM-4 Lock Indicator Does Not Come On For About 4 Seconds When the Ignition Switch Is Turned On (II)

The VTM-4 LOCK indicator does not come on for about 4 seconds when the ignition switch is turned ON (II)
1. Disconnect VTM-4 control unit connector A (22P) from the VTM-4 control unit.
2. Turn the ignition switch ON (II).
3. Connect the A16 terminal of the VTM-4 control unit to body ground with a jumper wire, and check the VTM-4 LOCK indicator.





Does the VTM-4 LOCK 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 4.
4. Turn the ignition switch OFF.
5. Remove the VTM-4 LOCK switch.
6. Connect the No. 3 terminal of the VTM-4 LOCK switch 7P connector to body ground with a jumper wire.





7. Check for continuity between the A16 terminal and body ground.





Is there continuity?
YES - Go to step 8.
NO - Repair open in the wire between the A16 terminal of the VTM-4 control unit and the VTM-4 LOCK switch.
8. Turn the ignition switch ON (II).
9. Measure voltage between the No. 2 terminal of the VTM-4 LOCK switch 7P connector and body ground.





Is there battery voltage?
YES - Replace the VTM-4 LOCK indicator bulb.
NO - Repair open in the wire between the No. 2 terminal of the VTM-4 LOCK switch 7P connector and the driver's under-dash fuse/relay box.