Gauge Control Module Input Test
- Remove the gauge control module (see GAUGE CONTROL MODULE REPLACEMENT ).
- Disconnect connector A (30P) from the gauge control module.
- Inspect the connector and socket terminals to be sure they are all making good contact.
- If the terminals are bent, loose or corroded, repair them as necessary, and recheck the system.
- If the terminals look OK, go to step 4.
- Reconnect connector A to the gauge control module, and make these input tests at the connector.
- If any test indicates a problem, find and correct the cause, then recheck the system.
- If all the input tests prove OK, replace the gauge control module.
POSSIBLE CAUSECavity Wire Test condition Test: Desired result Possible cause if result is not obtained A6 WHT/RED Under all conditions Check for voltage to ground:
There should be battery voltage.- Blown No. 7 (7.5 A) fuse in the driver's under-dash fuse/relay box
- An open in the wire
A5 YEL Ignition switch ON (II) Check for voltage to ground: There should be battery voltage. - Blown No. 21 (7.5 A) fuse in the driver's under-dash fuse/relay box
- An open in the wire
A20 BLK Under all conditions Check for voltage to ground: There should be less than 1 V. - Poor ground (G502)
- An open in the wire
A20 A25 BRN/YEL Under all conditions Check for continuity between the A25 terminal and the driver's under-dash fuse/relay box connector N (45P) No. 28 terminal:
There should be continuity.An open in the wire