Washer Inoperative
- Remove pump cover and connect a battery to washer No. 2 terminal and to ground. Connect a jumper wire from No. 1 terminal to ground. Turn ratchet pawl so holding contacts are closed. Pawl should be pulled toward relay pole and engage ratchet teeth. If not, relay coil is open.
Courtesy of GENERAL MOTORS COMPANY
- If relay and ratchet pawl operate correctly, manually rotate three-lobe cam clockwise (looking at cam). Relay holding contacts should close and pump plunger arm should release from lock out position. Disconnect jumper wire from No. 1 terminal. Relay coil should remain energized and hold ratchet pawl against ratchet wheel. If not, holding contacts are dirty or open.
- If pump operated properly in step 2, manually rotate three-lobe cam until ratchet wheel has turned 360° or 21 teeth. At this point, holding contacts should be opened by hump on wheel and pump plunger arm should be in lock out position.