Wire Diagram Wiper Motor. Relays do not have to be used but if using a switch it is important to use the correct lucas wiper switch part no 35927. One is wired to fused key on power and the other two are wired to the wiper switch.
Only wire a is grounded the wipers run in high. When you make use of your finger or perhaps the actual circuit with your eyes it is easy to mistrace the circuit. Slow speed as shown in the wiring diagram above and not the fast speed.
The diagram below shows how to wire up the 2 speed wiper motor using two single pole double throw 5 pin automotive relays.
Run a wire from the other side of the switch to chassis ground on position. When you employ your finger or even stick to the circuit with your eyes it may be easy to mistrace the circuit. Wiper motor wiring diagram. 43sqd outstanding contributor.