Component Testing

WARNING: This page is about a different car, the 2022 Cadillac CT5. However, it is still accessible from the selected car via links, so may be relevant.

Relay Test

Ignition OFF/Vehicle OFF, disconnect the appropriate relay.
Test for 60 - 200 Ω between terminals 85 and 86.
- If less than 60 or greater than 200
  Replace the relay.
- Go to next step: If between 60 - 200 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 relay.
- Go to next step: If infinite resistance
Test for less than 5 Ω between terminals 30 and 87A.
- If 5 Ω or greater
  Replace the relay.
- Go to next step: If less than 5 Ω
Install a 10 A fused jumper wire between relay terminal 85 and 12 V. Install a jumper wire between relay terminal 86 and ground.
Test for less than 5 Ω between terminals 30 and 87.
- If 5 Ω or greater
  Replace the relay.
- Go to next step: If less than 5 Ω
All OK