Component Testing
WARNING: This page is about a different car, the 2019 Buick Cascada, 2018 Buick Cascada, and 2017 Buick Cascada. However, it is still accessible from the selected car via links, so may be relevant.
Relay Test
- Ignition OFF, disconnect the KR27 Starter Relay.
- Test for 60 - 180 Ω between terminals 85 and 86.
- If less than 60 or greater than 180 Ω
Replace the KR27 Starter Relay.
- Go to next step: If between 60 - 180 Ω
- If less than 60 or greater than 180 Ω
- Test for infinite resistance between the terminals listed below:
- 30 and 86
- 30 and 87
- 30 and 85
- 85 and 87
- If less than infinite resistance
Replace the KR27 Starter Relay.
- Go to next step: If infinite resistance
- Install a 20 A fused jumper wire between relay terminal 85 and B+. Install a jumper wire between relay terminal 86 and ground.
- Test for less than 2 Ω between terminals 30 and 87A.
- If 2 Ω or greater
Replace the KR27 Starter Relay.
- Go to next step: If less than 2 Ω
- If 2 Ω or greater
- All OK