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HOMESERVICE MANUALSFORD1997EXPLORER 4D UTILITY, 4.0 X, RWD, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTWIPER/WASHER SYSTEMSWIPER SYSTEM & WASHER SYSTEMDIAGNOSTIC TESTINGTEST M: WIPERS INOPERATIVE
1997 Ford Explorer 4D Utility, 4.0 X, RWD, Automatic

Test M: Wipers Inoperative

1997 Ford Explorer 4D Utility, 4.0 X, RWD, AutomaticSECTION Test M: Wipers Inoperative
NOTE: TESTS M-R apply to Central Timer Module (CTM) controlled wiper/washer systems.
  1. Check fuse No. 16 (30-amp) at junction fuse/relay panel. If fuse is good, go to next step. If faulty, replace fuse, clear any Diagnostic Trouble Codes (DTCs) and test system for proper operation.
  2. Remove key from ignition switch. Connect jumper wire between CTM test connector terminals. CTM output test mode is now active. Retrieve DTCs stored in CTM. If DTC(s) exist, service DTCs in numerical order. See TEST M DTC INDEX TABLE. Remove jumper wire to exit CTM output test mode. If no DTCs exist, go to next step.
    TEST M DTC INDEX

    DTC Go To Step
    12 3
    13 3
    14 (1)
    15 (1)
    22 8
    (1) Replace CTM, clear DTC(s) and retest system.
  3. Enter CTM self-diagnostics. See SELF-DIAGNOSTICS  . Monitor CTM tone while turning wiper switch through all positions. If tone activates in all switch positions, exit test mode and go to step 8). If tone does not activate in all switch positions, exit test mode and go to next step.
  4. Turn ignition off. Disconnect multifunction switch 7-pin connector. Check wiper portion of multifunction switch. See WIPER SWITCH under COMPONENT TESTS  . If switch is good, go to next step. If faulty, replace multifunction switch, clear DTC(s) and retest system.
  5. Disconnect CTM 26-pin connector. Measure resistance of Light Blue/Orange wire, Gray/Red wire and Pink/Yellow wire between CTM 26-pin connector and multifunction switch 7-pin connector. If resistances are 5 ohms or less, go to next step. If resistance of any wire(s) is greater than 5 ohms, repair wire(s) as necessary. Clear DTC(s) and retest system.
  6. Turn ignition on. Measure voltage at multifunction switch 7-pin connector Light Blue/Orange and Pink/Yellow wire terminals. If readings are less than 10 volts, go to next step. If reading(s) is 10 volts or greater, repair wire(s) for short to battery power. Clear DTC(s) and retest system.
  7. Turn ignition off. Disconnect CTM 26-pin connector. Measure resistance of Light Blue/Orange wire, Gray/Red wire and Pink/Yellow wire between CTM 26-pin connector and ground. If resistances are 10 k/ohms or greater, replace CTM. If resistance of any wire(s) is less than 10 k/ohms, repair wire(s) as necessary. After repair, clear DTC(s) and retest system.
  8. Disconnect wiper run relay. Turn ignition to ACC position. Measure voltage at wiper run relay terminals No. 1 and 5 (Red wire at both terminals). See Figure . If readings are 10 volts or greater, go to next step. If reading(s) is less than 10 volts, repair wire(s) as necessary, clear DTC(s) and retest system.
  9. Turn ignition off. Check wiper run relay. See RELAYS  under COMPONENT TESTS. If relay is good, go to next step. If faulty, replace relay, clear DTC(s) and retest system.
  10. Disconnect CTM 26-pin connector. Turn ignition on. Measure voltage at wiper run relay connector terminal No. 2 (Yellow/White wire). If reading is less than 10 volts, reconnect relay and go to next step. If reading is less than 10 volts, repair Yellow/White wire as necessary, clear DTC(s) and retest system.
  11. Connect jumper wire between CTM 26-pin harness connector terminal No. 19 (Yellow/White wire) and ground. See Figure . If wipers do not operate, remove jumper wire and go to next step. If wipers operate, replace CTM, clear DTC(s) and retest system.
  12. Turn ignition off. Disconnect wiper run relay. Measure resistance of Yellow/White wire between wiper run relay connector terminal No. 2 and CTM 26-pin connector terminal No. 19. See Figure and Figure . If resistance is 5 ohms or less, reconnect wiper run relay and go to next step. If resistance is greater than 5 ohms, repair Yellow/White wire, clear DTC(s) and retest system.
  13. Disconnect high/low relay. Turn ignition on. Set wiper switch for low speed operation. Measure voltage at high/low relay connector terminal No. 3 (Black/Pink wire). See Figure . If reading is 10 volts or greater, go to next step. If reading is less than 10 volts, repair Black/Pink wire, clear DTC(s) and retest system.
  14. Check wiper high/low relay. See RELAYS  under COMPONENT TESTS. If relay is good, go to next step. If faulty, replace relay, clear DTC(s) and retest system.
  15. Turn ignition off. Disconnect wiper motor harness connector. Measure resistance of Black wire between wiper motor harness connector and ground. If resistance is 5 ohms or less, go to next step. If resistance is greater than 5 ohms, repair Black wire, clear DTC(s) and retest system. 16 Turn ignition off. Remove wiper linkage from wiper motor. Check wiper linkage for free operation. If linkage is free binding and operational resistance, check wiper motor. See WIPER MOTOR  under COMPONENT TESTS. If linkage does not operate freely, repair as necessary. Reconnect linkage, clear DTC(s) and retest system.
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