Power Supply & Ground Circuit Check: Q45
- Disconnect instrument panel Brown 16-pin harness connector N14. Disconnect instrument cluster White 16-pin harness connector N14. See Figure
. Measure voltage at terminal No. 41 (Green wire) at instrument panel harness connector N14. See Fig 9
. If battery voltage exists only with ignition switch in RUN or START positions, go to next step. If battery voltage exists with ignition switch in any other position, repair short to voltage in Green wire between instrument cluster and fuse No. 4 in instrument panel fuse box. If battery voltage does not exist with ignition switch in RUN or START positions, check for the following and repair as necessary:
- Blown fuse No. 4 (7.5-amp) in instrument panel fuse box.
- Open in Green wire between instrument cluster and fuse No. 4. See WIRING DIAGRAMS .
- Problem in power distribution circuit. See appropriate POWER DISTRIBUTION wiring diagram in SYSTEM WIRING DIAGRAMS article.NOTE: Terminal No. 31 on instrument panel harness connector N14 is ground terminal for tachometer. Terminal No. 43 on instrument panel harness connector N14 is ground terminal for coolant temperature gauge. Terminal No. 14 on instrument panel harness connector N12 is ground terminal fuel gauge.
- Ensure ignition switch is in OFF position. Measure resistance between ground and terminals No. 31 and 43 (both Black wires) at instrument cluster harness connector N14. Measure resistance between ground and terminal No. 14 (Black wire) at instrument cluster harness connector N12. If all resistance readings are 5 ohms or less, instrument cluster power and ground circuits are okay at this time. If any resistance reading is greater than 5 ohms, repair open in appropriate Black wire between instrument cluster and ground.