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Checking Power & Grounds

  1. Power seats and mirrors receive power through fuse No. 2 (40-amp maxi-fuse) located in Power Distribution Center (PDC). If power seats, mirrors, locks, rear blower and fog lamps (if equipped) are all inoperative check maxi-fuse and replace as necessary.
  2. If new fuse blows immediately, repair short to ground in appropriate circuit. See WIRING DIAGRAMS  .
  3. If power seats are inoperative and maxi-fuse is okay, check 30-amp circuit breaker (located in driver's seat harness, 10" from Black 4-pin connector).
  4. Check power supply circuit to circuit breaker (Red/White wire). Check 30-amp circuit breaker. Check both Red wires that supply system power to passenger's power seat switch and MSM module.
  5. If power locks, rear blower and fog lamps are all operating and both seats are inoperative, repair open in Red wire between seats and circuit breaker or replace defective 30-amp circuit breaker.
  6. Check continuity of Black ground wire between left cowl ground block and driver's power seat switch terminal No. 1. Check continuity of Black ground wire between left cowl ground block and MSM module terminal No. 7.
  7. If passenger's power seat is operational and driver's power seat is not, check continuity of Red wire between 30-amp circuit breaker and MSM module 10-pin connector terminal No. 8. See Figure . Repair as necessary.
  8. If driver's power seat remains inoperative, using DVOM, check for voltage at MSM module 21-pin connector terminal No. 11 and driver's power seat switch terminal No. 5. See Figure . This is a low current battery voltage circuit and will not light a test light. If voltage does not exist, replace MSM module or repair open Red wire as necessary.
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