LEMON Manuals: Even more car manuals for everyone
Home >> Cadillac >> 1994 >> DeVille Base >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Self-Diagnostics >> Trouble Codes >> Code I022 Panel Dimming Switch Pot Circuit

Code I022 Panel Dimming Switch Pot Circuit

  1. Turn ignition switch and headlight switch on. Enter self-diagnostics. See ENTERING SELF-DIAGNOSTICS  under SELF-DIAGNOSTICS. Monitor ID42 dimming input. If display value is "4" or less, go to step 3). If display value is "5" or more, no problem is found. Go to next step.
  2. If no problem is found, check for an intermittent problem by turning dimmer switch through its full travel, watching for sudden jumps in display numbers. If a failure is induced, display reading will jump from normal value to a value less than "4". Remove headlight switch and instrument panel top cover. Ensure good terminal contacts at headlight switch connector and at IPC connector cavities D3 and C10. See Figure . Wiggle test related wiring while observing IPC Data value ID42.
  3. Turn headlights on. Using voltmeter, connect one lead to ground and backprobe headlight switch 4-cavity connector terminal "C" (Gray wire). Rotate dimmer switch. If voltage changes with dimmer switch movement, go to step 6). If voltage does not change or is not present, go to next step.
  4. Leave headlights on. Using both DVOM probes, backprobe between headlight switch 4-cavity connector terminals "B" (Brown wire) and "A" (Black wire). If voltage is less than 8 volts, go to next step. If voltage is 8 volts or more, check for faulty connections at headlight switch 4-cavity connector. If all connections are good, replace headlight switch.
  5. Leave headlights on. Using DVOM, backprobe headlight switch 4-cavity connector terminal "B" (Brown wire) to ground. If voltage is less than 8 volts, repair open in Brown wire between headlight switch and IPC. If voltage is 8 volts or more, repair open in Black wire from headlight switch to ground.
  6. Using DVOM, backprobe IPC connector terminal C10 to ground. See Figure . Rotate dimmer switch. If no voltage exists, repair open in Gray wire circuit between headlight switch and IPC.
  7. If voltage changes with dimmer switch, check IPC connector terminals for faulty terminals/connections. If connections are good, replace IPC. See INSTRUMENT PANEL CLUSTER  under REMOVAL & INSTALLATION. After all repairs are completed, clear all codes and verify correct operation.
NOTE: Following test should be used when multiple codes exist.
scientia non olet · About LEMON Manuals