Diagnostic Test

1) TEST THE POWER SEAT RELAY CIRCUIT
NOTE: Inspect Fuses 21 and 22 located in the Underhood Accessory Fuse Block. If the fuses are open, repair the cause of the open fuse before continuing.

Fig 1: Testing Power Seat Relay Circuit
Courtesy of DAIMLERCHRYSLER CORP.

Turn the ignition off.

Disconnect the Power Seat Relay.

NOTE: Check connectors - Clean/repair as necessary.

Connect a jumper wire between cavity 8 and cavity 2 of the Power Seat Relay harness connector.

Actuate the Driver and Passenger Power Seat Switches.

Did the Driver and Passenger Power Seats move?

Yes
1. Replace the Power Seat Relay.
2. Perform BODY VERIFICATION TEST .
No
1. Go to step 2).
2) MEASURE POWER SEAT RELAY FUSED B(+) CIRCUIT VOLTAGE

Fig 2: Measuring Power Seat Relay Fused B(+) Circuit Voltage
Courtesy of DAIMLERCHRYSLER CORP.

Disconnect the jumper wire.

Measure the voltage of the Fused B(+) circuit at the Power Seat Relay harness connector.

Is the voltage above 10 volts?

Yes
1. Go to step 3).
No
1. Repair the Fused B(+) circuit for an open.
2. Perform BODY VERIFICATION TEST .
3) MEASURE POWER SEAT RELAY GROUND CIRCUIT RESISTANCE

Fig 3: Measuring Power Seat Relay Ground Circuit Resistance
Courtesy of DAIMLERCHRYSLER CORP.

Measure the resistance between ground and the Ground circuit.

Is the resistance below 5.0 ohms?

Yes
1. Repair the open circuit between the Power Seat Relay harness connector and the Underhood Accessory Fuse Block.
2. Perform BODY VERIFICATION TEST .
No
1. Repair the open Ground circuit between the Power Seat Relay harness connector and ground.
2. Perform BODY VERIFICATION TEST .