Test A: Instrument Cluster Display(S) Inoperative Or Erratic
Courtesy of FORD MOTOR CO.
- Check 10-amp METER fuse. See Fig 1
. If fuse is okay, go to next step. If fuse is blown, go to next step. Turn ignition off. Replace 10-amp METER fuse. Turn ignition on and inspect fuse. If fuse fails again, check and repair short to ground as necessary. See WIRING DIAGRAMS.
- Turn ignition on. Measure voltage between ground and top terminal of METER fuse holder (Blue wire). If voltage is more than 10 volts, reinstall fuse and go to next step. If voltage is less than 10 volts, repair power feed for METER fuse. See WIRING DIAGRAMS.
- Turn ignition off. Remove instrument cluster. See INSTRUMENT CLUSTER under REMOVAL & INSTALLATION. Disconnect all (3) instrument cluster electrical connectors. Measure voltage between ground and instrument cluster harness connector C254 (Black/Yellow wire) terminal No. 10. See Fig 2
. Measure voltage between ground and instrument cluster harness connector C252 (Black/Yellow wire) terminals No. 4 and 8. See Fig 3
. Measure voltage between ground and instrument cluster harness connector C253 (Black/Yellow wire) terminals No. 1 and 8. See Fig 4
and Figure
. Voltage should be more than 10 volts at each Black/Yellow wire. If voltage is more than 10 volts, go to next step. If voltage is less than 10 volts, repair Black/Yellow wire(s) in question. See WIRING DIAGRAMS.
- Turn ignition off. Measure resistance between ground and instrument cluster harness connector C254 terminal No. 5 (Black/Green wire). Measure resistance between ground and instrument cluster harness connector C252 terminal No. 7 (Blue wire). Measure resistance between ground and instrument cluster harness connector C253 terminal No. 11 (Black wire). Measure resistance between ground and instrument cluster harness connector C253 (Black/Green wire) terminal No. 7. Resistance should be less than 5 ohms. If resistance is less than 5 ohms on all wires, replace instrument cluster printed circuit and gauge contact clips. See PRINTED CIRCUIT under REMOVAL & INSTALLATION. If any resistance is more than 5 ohms, repair circuits in question. See WIRING DIAGRAMS.
Courtesy of FORD MOTOR CO.
Courtesy of FORD MOTOR CO.
Courtesy of FORD MOTOR CO.