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moved in the opposite direction, the battery feed and Each motor contains a self-resetting circuit breaker to protect it from overload. Consecutive or frequent The power seat adjuster and motors cannot be repaired, and are serviced only as a complete unit. If CIRCUIT BREAKER An automatic resetting circuit breaker in the junc- tion block is used to protect the power seat system The circuit breaker cannot be repaired and, if faulty or damaged, it must be replaced. DIAGNOSIS AND TESTING POWER SEAT SYSTEM Before any testing of the power seat system is attempted, the battery should be fully-charged and With the dome lamp on, apply the power seat switch in the direction of the failure. If the dome CIRCUIT BREAKER For circuit descriptions and diagrams, refer to 8W-63 - Power Seat in Group 8W - Wiring Diagrams. (1) Locate the correct circuit breaker in the junc- tion block. Pull out the circuit breaker slightly, but (2) Connect the negative lead of a 12-volt DC volt- meter to a good ground. (3) With the voltmeter positive lead, check both terminals of the circuit breaker for battery voltage. If only one terminal has battery voltage, the circuit breaker is faulty and must be replaced. If neither ter- from the Power Distribution Center (PDC) as required. POWER SEAT ADJUSTER AND MOTORS For circuit descriptions and diagrams, refer to 8W-63 - Power Seat in Group 8W - Wiring Diagrams. Operate the power seat switch to move all three seat motors in each direction. The seat should move (1) Test the circuit breaker in the junction block as described in this group. If OK, go to Step 2. If not (2) Remove the power seat switch from the seat. Check for battery voltage at the fused B(+) circuit (3) Check for continuity between the ground cir- cuit cavity of the power seat switch wire harness con- and a good ground. There should be continuity. If OK, go to Step 4. If not OK, repair the (4) Test the power seat switch as described in this group. If the switch tests OK, check the wire harness POWER SEAT SWITCH For circuit descriptions and diagrams, refer to 8W-63 - Power Seat in Group 8W - Wiring Diagrams. (1) Disconnect and isolate the battery negative cable. (2) Remove the power seat switch from the power seat. (3) Use an ohmmeter to test the continuity of the power seat switches in each position. See the Power 8R - 2 POWER SEAT SYSTEMS XJ DESCRIPTION AND OPERATION (Continued) |