Where Is the Wiper Relay

Internal Relay In some vehicles, the wiper relay switch is inside the actual windshield wiper motor. If it fails, the entire motor needs to be replaced, as you can’t get parts to fix it.

What causes intermittent wipers to stop working?

The two most common failures are: A broken turn signal “canceling” mechanism that won’t shut off the “blinkers” after a turn, A partial or complete loss of intermittent wiper control.

Why do my wipers only work on high?

If the reading is made only on the high-speed terminal, the switch has failed. Inside the switch are a number of terminals that are sprung to make contact as the control is turned or slid like a lever; these contacts can lose their “springiness” and fail to make contact.