Test A: Electronic Day/Night Mirror Inoperative (AEROSTAR & Explorer)
- Check mirror operation, both low and high. Cover the sensor on the backside of the mirror with a dark (preferably black) cloth. With a flashlight, shine light on the sensor located on the upper right side of the mirror glass. Does the mirror glass darken to the non-reflective state? If yes, mirror is okay. If no, go to next step.
- Check for blown fuse. Is the fuse blown? If yes, replace and retest mirror for correct operation. See ELECTRONIC DAY/NIGHT MIRROR (AEROSTAR & EXPLORER)
under REMOVAL & INSTALLATION. If fuse is not blown, go to next step.
- Check for voltage between 298 (P/O) (Aerostar) or 640 (R/Y) (Explorer) and 57 (B/K) circuits. See Fig 1
. See WIRING DIAGRAMS
. Remove electrical connector from rear of mirror. Check for voltage at the harness connectors. Is voltage present between Circuits 298 (P/O) (Aerostar) or 640 (R/Y) (Explorer) and 57 (B/K)? If yes, carefully and securely PLUG mirror feed connector into back of mirror and again CHECK for correct operation. If no, go to next step.
- Check for voltage between Circuit 298 (P/O) (Aerostar) or 640 (R/Y) (Explorer) and a good ground. Is there voltage? See Fig 1
. See WIRING DIAGRAMS
. If yes, service 57 as required. Go to next step. If no, service 298 (Aerostar) or 640 (Explorer) as required.
- Check mirror operation in both low and high. Reconnect mirror. Check mirror as outlined in step 1
. Does mirror glass darken to the non-reflective state. If yes, mirror is okay. If no, replace mirror. See ELECTRONIC DAY/NIGHT MIRROR (AEROSTAR & EXPLORER)
under REMOVAL & INSTALLATION.
Courtesy of FORD MOTOR CO.