Wiring And Switch
- Leave wiring harness connected at motor for the following tests. Connect a test lamp between terminal "L" and ground with switch in "LOW" and ignition "ON". Test lamp should light and motor should operate. Connect test lamp between terminal "H" and ground with switch in "HIGH". Test lamp should light and motor should operate.
- If motor does not operate and lamp does not light, short is in switch or wiring. If motor does not operate but test lamp lights, motor brushes need cleaning or repair.
- Remove wiring connector at motor. Connect a jumper wire from "P2" to "L", and another jumper from "P1" to battery. Motor should run to park position and stop. If not, replace gearbox assembly. If motor parks properly with jumper wires, original problem was in control switch.
- If wipers stop at any position when switch is turned "OFF", clean connections at motor and retest. If problem still exists, connect voltmeter between "P1" and "L". If voltage is present, check voltage between "L" and "P2". If no voltage at "P2", motor park switch is bad and gearbox must be replaced. If voltage at "P2", wiper control switch is bad and must be replaced.
- Disconnect wiring harness at wiper switch connector. Test terminals of switch for continuity, using the following chart.
2-SPEED STANDARD SWITCH CONTINUITY
| Switch Position | Continuity |
|---|---|
| Off | B to P1, A to P2 |
| Pulse (Omni-Hor. Only) | B to P1, B to A |
| Low | B to P1, B to A |
| High | B to P1, B to H |