Wiper Delay Inoperative
- If wiper is completely inoperative in "DELAY" position, place switch in "DELAY", adjust to middle of delay position, and disconnect terminal 6 wiring. Connect an ohmmeter between terminal 6 wire and ground. Resistance should be measured on 1 megohm scale. If so, replace timer/switch assembly. If not, replace dash switch.
- If wiper operates but does not delay, place switch in middle of "DELAY" position and disconnect terminal 6 wire with wipers operating. If wipers stop, problem is a grounded terminal 6 wire or dash switch.
- If wipers do not stop with terminal 6 wire disconnected, remove washer pump cover and reconnect all wiring. Disconnect orange wire from pulse relay terminal while wipers are running. If wipers stop, replace timer/switch assembly. If not, replace pulse relay.
Courtesy of GENERAL MOTORS COMPANY