Power Seat Track Test
- Operate power seat switch so all 3 motors have been energized. If one or more motors operate, move power seat a short distance in opposite direction and ensure track is not beyond travel limit. If power seat fails to operate in only one direction, test power seat switch. See POWER SEAT SWITCH TEST . If power seat fails to operate in all directions, go to next step.
- Remove circuit breaker No. 29 (25-amp) from junction block. Test circuit breaker. See CIRCUIT BREAKER TEST under COMPONENT TESTS. If circuit breaker is not okay, replace circuit breaker. If circuit breaker is okay, go to next step.
- Remove power seat switch. See POWER SEAT SWITCH under REMOVAL & INSTALLATION. Using DVOM, measure battery voltage between ground and Red wire terminal at suspect power seat switch harness connector (terminal "B" on passenger's side and terminal "A" on driver's side). See Fig 1. If battery voltage exists, go to next step. If battery voltage does not exist, repair open in Red wire between junction block and power seat switch. See WIRING DIAGRAMS .
- Check continuity between ground and Black wire terminal at suspect power seat harness connector (terminal "A" on passenger's side and terminal "B" on driver's side). If continuity exists, go to next step. If continuity does not exist, repair open in Black wire between power seat switch and ground point. Ground point is located under passenger's front seat, for both seats.
- Test power seat switch. Perform POWER SEAT SWITCH TEST under COMPONENT TESTS. If power seat switch is not okay, replace power seat switch. See POWER SEAT SWITCH under REMOVAL & INSTALLATION. If power seat switch is okay, check for opens or short in wiring harness between power seat track assembly and power seat switch harness connector. See WIRING DIAGRAMS . If wiring is not okay, repair as necessary. If wiring is okay, replace power seat track assembly. See POWER SEAT TRACK ASSEMBLY under REMOVAL & INSTALLATION.
Courtesy of DAIMLERCHRYSLER CORPORATION