LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 1997 >> Cavalier RS, Standard >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Heated Glass/Defoggers >> Rear Window Defogger >> Testing >> Defogger System Tests >> Defogger Does Not Operate

Defogger Does Not Operate

  1. Disconnect A/C-heater and rear defogger control assembly 8-pin connector C1. Turn ignition on. Connect test light between ground and harness connector C1 terminal "B" (Brown wire). If test light illuminates, go to next step. If test light does not illuminate, repair open in Brown wire between fuse block andA/C-heater and rear defogger control assembly.
  2. Ensure ignition is still on. Connect test light between harness connector C1 terminals "B" (Brown wire) and "A" (Black wire). If test light illuminates, go to next step. If test light does not illuminate, repair open in Black wire between A/C-heater and rear defogger control assembly and ground.
  3. Ensure ignition is still on. Connect test light between harness connector C1 terminals "A" (Black wire) and "D" (Orange wire). If test light illuminates, go to next step. If test light does not illuminate, repair open in Orange wire between fuse block and A/C-heater and rear defogger control assembly.
  4. Turn ignition off. Reconnect A/C-heater and rear defogger control assembly connector C1. Turn ignition on. Turn ignition on. Connect test light between ground and connector C1 terminal "H" (Purple wire). Press rear defogger switch on. If test light illuminates, go to next step. If test light does not illuminate, replace A/C-heater and rear defogger control assembly. See REMOVAL & INSTALLATION  .
  5. Check for open in Purple wire between A/C-heater and rear defogger control assembly and rear defogger grid. Check for open in Black wire between rear defogger grid and ground. If circuits are okay, go to GRID FILAMENT TEST  .
scientia non olet · About LEMON Manuals