System Test "A" Automatic Dimming Inside/Outside Mirrors Do Not Switch Automatically
WARNING: This page is about a different car, the 1997 Lincoln Continental. However, it is still accessible from the selected car via links, so may be relevant.
- Power Supply To Mirror Check - Turn ignition on. Access inside mirror 7-pin connector. Check Light Green/Orange wire for voltage at connector. If battery voltage exists, go to next step. If battery voltage does not exist, check for open in Light Green/Orange wire. Repair wire as necessary. Retest system.
- Ground Circuit Check - Check continuity between ground and terminal No. 6 (Black wire) at 7-pin connector. If resistance is 5 ohms or less, go to next step. If resistance is greater than 5 ohms, repair open in Black wire.
- Automatic Mirror Dimming Check - Ensure gear selector is in Park. Cover ambient light sensor located on back of mirror with a dark cloth. Shine a flashlight on the glass sensor located to the right of glare control switch on the front side of the mirror case. The inside mirror and the driver's outside mirror should darken. Remove cloth and flashlight. The inside mirror and the driver's outside mirror should lighten. If the mirrors do not operate as specified, go to next step. If mirror operates as specified, system is okay.
- Circuit Check (Black/Pink Wire) - Check voltage by backprobing Black/Pink wire at 7-pin connector. If voltage exists, check Transmission Range (TR) sensor. See TR SENSOR TEST. If voltage does not exist, replace inside rear view mirror. Retest system.