Motor Will Not Operate In Any Switch Position

Note: Whenever a wiper motor malfunction occurs, ensure wiper motor wire harness is properly connected before starting with normal diagnosis and repair procedures.


1. Check for blown fuse No. 10 in junction block and No. C in power distribution center.
2. If fuses are defective replace, then check motor operation in all switch positions. If motor is still inoperative and fuse does not blow proceed to next step. If replacement fuse blows proceed to step 12.
3. Disconnect motor wire connector, check motor Low speed operation by disconnecting wiper motor connector, using two jumper wires connect one wire between battery positive terminal and terminal 3 of motor connector, then connect other wire to battery negative and terminal four of motor connector.
4. Check High speed operation by connecting battery positive jumper to terminal two of motor connector and battery negative to terminal four of motor connector.
5. If motor has no High or Low speed, using a suitable ohmmeter check for a good ground at terminal four of motor wiring harness connector. If satisfactory, replace motor. If ground is not satisfactory repair ground circuit as needed.
6. If motor runs, using a suitable ohmmeter check for battery voltage at terminal D of intermittent relay in distribution center. If no voltage check fuse C, if satisfactory proceed to next step. If not repair as necessary.
7. Using a suitable ohmmeter check terminal D of HI-LO wiper relay to terminal two of wiring harness connector at motor for continuity. Check from terminal E of HI-Low wiper relay to terminal three of wiring harness connector at motor for continuity. If satisfactory proceed to next step. If not repair as necessary.
8. Using a suitable ohmmeter check continuity between HI-LO wiper relay and intermittent wiper relay. Check from terminal B of HI-LO wiper relay to terminal B of intermittent wiper relay. If satisfactory check for defective relays. If not repair as necessary.
9. Disconnect J3 24-way connector from body controller.
10. Using a suitable ohmmeter, check for continuity between terminal one of 24 way connector to terminal C of intermittent wiper relay. If satisfactory proceed to next step. If not repair as necessary.
11. With wiper switch connected, using a suitable voltmeter connect positive lead to terminal one of wiper switch, then turn ignition switch to ON position. Move wiper switch from OFF position to High position, then proceed as follows:
a. If no voltage is present, replace wiper switch. If voltage is present, check continuity from terminal one of wiper switch to terminal 16 of body controller J3.
b. Turn ignition Off, using a suitable ohmmeter check for continuity between fuse No. 10 and terminal 1 and 18 of body controller J3. If no continuity is present, check HI-LO and intermittent relays. If relays are satisfactory, repair wire circuit as necessary.
c. If voltage increases from zero to approximately 10 volts in HIGH position replace body controller.
12. Disconnect motor connector and replace fuse No. 10 from junction block, if fuse does not blows go to step three. If fuse blows, wiper control circuitry is at fault, repair as necessary.