Both Side Mirrors Inoperative
- Power Supply And Ground Check
- Remove power mirror control switch and unplug harness connector. Measure voltage at mirror control switch connector between Black wire and power wire. See the POWER WIRE COLOR IDENTIFICATION
table. If battery voltage is measured, go to step 6). If battery voltage is not indicated, go to next step.POWER WIRE COLOR IDENTIFICATION
Application Wire Color Sable & Taurus Dark Green - Ground Circuit Check - Disconnect mirror switch harness connector. Measure resistance between Black wire at mirror switch harness connector and ground. If resistance is 5 ohms or less, go to next step. If resistance is greater than 5 ohms, repair Black wire. Reconnect harness connector and retest system.
- Power Supply Check - Turn ignition on. Measure voltage at power wire at mirror switch harness connector. See POWER WIRE COLOR IDENTIFICATION table. If battery voltage is indicated, go to step 6). If battery voltage is not indicated, go to next step.
- Short To Ground Check - Turn ignition off. Measure resistance between chassis ground and power wire at mirror switch harness connector. If resistance is greater than 10 k/ohms, go to next step. If resistance is less than 10 k/ohms, repair short to ground in power wire.
- Power Supply Circuit Continuity Check - Remove power mirror system fuse. See appropriate WIRING DIAGRAM , for fuse identification. Check continuity of power wire between mirror control switch and fuse cavity. If resistance is 5 ohms or less, replace fuse and to next step. If resistance is greater than 5 ohms, repair open power wire and retest system.
- Mirror Function Check
- Unplug mirror switch. Using jumper wires, check mirror operation by applying battery voltage and grounding appropriate wire terminals. See the MIRROR FUNCTION TEST
table. Mirror should move in one direction. To move mirror in opposite direction reverse polarity of jumper wires. If mirrors operate in all directions, replace mirror control switch and retest system. If mirrors do not operate in all directions, go to next step.MIRROR FUNCTION TEST
Mirror Function Wire Color Right Mirror Up/Down Operation Purple & Yellow Left/Right Operation White & Yellow Left Mirror Up/Down Operation Dark Blue & Yellow Left/Right Operation Red & Yellow - Mirror Circuit Continuity Check - Unplug mirror switch. Unplug harness connector at suspect mirror. See SIDE MIRROR ASSEMBLY under REMOVAL & INSTALLATION. Using ohmmeter, check continuity of each wire between mirror and mirror switch harness connectors. See appropriate WIRING DIAGRAM , for wire color identification. Measure resistance between each wire at mirror harness connector and ground. If ohmmeter indicates any wire open or shorted to ground, repair open shorted wire(s). If all mirror circuits are okay, replace mirror motor.