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Home >> Cadillac >> 1996 >> Seville SLS >> Repair and Diagnosis (Single Page) >> Body & Frame >> Mirrors >> Mirror - Automatic Day/Night >> System Testing >> System Check For Normal Operation

System Check For Normal Operation

  1. Turn ignition to RUN position and shift selector to Park. Place mirror ON-OFF switch to ON position or OFF-MIN-MAX switch to MAX position. Cover ambient photocell sensor (windshield side) with a dark cloth. Shine a flashlight onto headlight photocell sensor (mirror side). If inside rearview mirror and left outside mirror (if equipped) gradually darken, go to next step. If mirror(s) does not darken, check connections. If connections are okay, check Pink, Yellow and/or Pink/Black wire circuits between mirror ON-OFF switch and fuse block for an open or a short to ground. Check Black or Black/White wire ground circuit for an open. See WIRING DIAGRAMS  .
  2. DO NOT  remove dark cloth and flashlight. Move shift selector to Reverse. If mirror(s) gradually lightens to a clear state, go to step 4). If outside mirror (if equipped) does not lighten, go to next step. If inside mirror does not lighten, check connections. If connections are okay, check park/neutral position switch operation. If park/neutral position switch is okay, check Light Green wire circuit between inside mirror and park/neutral position switch. If Light Green wire circuit is okay, check Pink wire circuit between park/neutral position switch and fuse block.
  3. If electrochromic outside mirror did not change, check Gray wire and Pink wire circuits between inside mirror and outside mirror.
  4. DO NOT  remove dark cloth and flashlight. Place shift selector to Park. Mirror(s) should gradually darken. Remove dark cloth and flashlight. Mirror(s) should gradually lighten to a clear state. If mirror(s) changes as described, system is operating normally. If mirror(s) does not change as described and fuses, connections and circuits are okay, replace suspect mirror assembly and retest system.