Circuit/System Testing

WARNING: This page is about a different car, the 2012 Chevrolet Volt. However, it is still accessible from the selected car via links, so may be relevant.

Windshield Wiper/Washer Switch Circuit Test

Vehicle OFF, Retained Accessory Power OFF, disconnect the X1 harness connector at the S82 Windshield Wiper/Washer Switch.
Verify a test lamp illuminates between terminal 2 and B+.
- If the test lamp does not illuminate, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K9 BCM.
Vehicle in Service Mode, test for 9-11 V between the signal circuit terminal 3 and ground.
- If less than the specified value, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
- If greater than the specified value, test the signal circuit for a short to voltage. If the circuit tests normal, replace the K9 BCM.
Test for B+ between the signal circuit terminal 1 and ground.
- If less than the specified value, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
Disconnect the X3 harness connector at the K9 BCM.
Test for less than 1 V between terminal 20 and ground.
- If greater than the specified value, test for a short to voltage.
Vehicle OFF, disconnect the harness connector at the S70R steering wheel control switch - right.
Vehicle in Service Mode, test for B+ between the voltage reference circuit terminal 1 and ground.
- If less than the specified value, test the voltage reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
If all circuits test normal, test or replace the S82 Windshield Wiper/Washer Switch.