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Home >> Ford >> 1998 >> Econoline E150, 4.2 2 >> Repair and Diagnosis >> Body & Frame >> Power Seats >> System Tests >> Test E: Improper Horizontally/Vertically Operation

Test E: Improper Horizontally/Vertically Operation

NOTE: Before beginning this test, ensure seat and seat track are free from all obstructions.

  1. Which Direction Has Failed

    Ensure ignition switch is in LOCK position. Operate seat in all directions. If seat does not move horizontally, go to next step. If seat does not move vertically, go to step 7).

  2. Test Voltage At Forward/Reverse Motor

    Disconnect seat motor harness connector. Measure voltage between Yellow/White and Red/White wires at seat motor harness connector. Operate seat control switch in both horizontal directions while observing voltmeter. If voltage does not change from less than -10 volts to greater than 10 volts, go to next step. If voltage changes from less than -10 volts to greater than 10 volts, replace seat motor assembly.

  3. Test Yellow/White Wire For Open

    Disconnect seat control switch harness connector. Measure resistance in Yellow/White wire between seat control switch harness connector and seat motor harness connector. If resistance is 5 ohms or less, go to next step. If resistance is greater than 5 ohms, repair open in Yellow/White wire.

  4. Test Yellow/White Wire For Short

    Measure resistance between ground and Yellow/White wire at seat control switch harness connector. If resistance is 10 k/ohms or greater, go to next step. If resistance is less than 10 k/ohms, repair short to ground in Yellow/White wire.

  5. Test Red/White Wire For Open

    Measure resistance in Red/White wire between seat control switch harness connector and seat motor harness connector. If resistance is 5 ohms or less, go to next step. If resistance is greater than 5 ohms, repair open in Red/White wire.

  6. Test Red/White Wire For Short

    Measure resistance between ground and Red/White wire at seat control switch harness connector. If resistance is 10 k/ohms or greater, replace seat control switch. If resistance is less than 10 k/ohms, repair short in Red/White wire.

  7. Test For Tilting Function Failure

    Operate tilting functions. If only forward tilting function works, go to next step. If only rear tilting function works, go to step 13). If no tilting functions work, replace seat control switch.

  8. Test Voltage At Rear Tilting Motor

    Disconnect seat motor harness connector. Measure voltage between Red/Light Green and Yellow/Light Green wires at seat motor harness connector. Operate seat control switch in both rear tilting directions, while observing voltmeter. If voltage does not change from less than -10 volts to greater than 10 volts, go to next step. If voltage changes from less than -10 volts to greater than 10 volts, replace seat motor assembly.

  9. Test Red/Light Green Wire For Open

    Disconnect seat control switch harness connector. Measure resistance in Red/Light Green wire between seat control switch harness connector and seat motor harness connector. If resistance is 5 ohms or less, go to next step. If resistance is greater than 5 ohms, repair open in Red/Light Green wire.

  10. Test Red/Light Green Wire For Short

    Measure resistance between ground and Red/Light Green wire at seat control switch harness connector. If resistance is 10 k/ohms or greater, go to next step. If resistance is less than 10 k/ohms, repair short to ground in Red/Light Green wire.

  11. Test Yellow/Light Green Wire For Open

    Measure resistance in Yellow/Light Green wire between seat control switch harness connector and seat motor harness connector. If resistance is 5 ohms or less, go to next step. If resistance is greater than 5 ohms, repair open in Yellow/Light Green wire.

  12. Test Yellow/Light Green Wire For Short

    Measure resistance between ground and Yellow/Light Green wire at seat control switch harness connector. If resistance is 10 k/ohms or greater, replace seat control switch. If resistance is less than 10 k/ohms, repair short in Yellow/Light Green wire.

  13. Test Voltage At Front Tilting Motor

    Disconnect seat motor harness connector. Measure voltage between Red/Light Blue and Yellow/Light Blue wires at seat motor harness connector. Operate seat switch in both front tilting directions, while observing voltmeter. If voltage does not change from less than -10 volts to greater than 10 volts, go to next step. If voltage changes from less than -10 volts to greater than 10 volts, replace seat motor assembly.

  14. Test Red/Light Blue Wire For Open

    Disconnect seat control switch harness connector. Measure resistance in Red/Light Blue wire between seat control switch harness connector and seat motor harness connector. If resistance is 5 ohms or less, go to next step. If resistance is greater than 5 ohms, repair open in Red/Light Blue wire.

  15. Test Red/Light Blue Wire For Short

    Measure resistance between ground and Red/Light Blue wire at seat control switch harness connector. If resistance is 10 k/ohms or greater, go to next step. If resistance is less than 10 k/ohms, repair short to ground in Red/Light Blue wire.

  16. Test Yellow/Light Blue Wire For Open

    Measure resistance in Yellow/Light Blue wire between seat control switch harness connector and seat motor harness connector. If resistance is 5 ohms or less, go to next step. If resistance is greater than 5 ohms, repair open in Yellow/Light Blue wire.

  17. Test Yellow/Light Blue Wire For Short

    Measure resistance between ground and Yellow/Light Blue wire at seat control switch harness connector. If resistance is 10,000 ohms or greater, replace seat control switch. If resistance is less than 10,000 ohms, repair short to ground in Yellow/Light Blue wire.
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