Gauge Control Module Input Test
- Remove the gauge control module (see REWRITING THE ODO DATA ON A NEW GAUGE CONTROL MODULE ).
- Disconnect the 18P connector 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.
- With the connector still disconnected, 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, go to step 5.WIRE TEST CONDITION CHART
Cavity Wire Test Condition Test: Desired result Possible cause if desired result is not obtained B11 BRN/YEL Under-dash fuse/relay box connector N (45P) disconnected Check for continuity between the B11 terminal and under-dash fuse/relay box connector N (45P) No. 28 terminal: There should be continuity. An open in the wire
- Reconnect the connectors and, make these input test at the connectors.
- 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.WIRE TEST CONDITION CHART
Cavity Wire Test Condition Test: Desired result Possible cause if desired result is not obtained B17 WHT/RED Under all conditions Measure the voltage to ground: There should be battery voltage. - Blown No. 7 (7.5 A) fuse in the under-dash fuse/relay box
- An open in the wire
B18 YEL Ignition switch ON (II) Measure the voltage to ground: There should be battery voltage. - Blown No. 21 (7.5 A) fuse in the under-dash fuse/relay box
- An open in the wire
B1 BLK Under all conditions Measure the voltage to ground: There should be less than 0.5 V. - Poor ground (G501)
- An open in the wire
B10