Circuit/System Testing

Ignition OFF, disconnect the harness connector at the S70R Steering Wheel Controls Switch - Right.
Verify a test lamp illuminates between terminal 6 and B+.
- If the test lamp does not illuminate
  Repair the open or high resistance on circuit 1351 or the ground point for circuit 1351.
- Go to next step: If the test lamp illuminates
Connect the harness connector at the S70R Steering Wheel Control Switch - Right.
Disconnect the X4 harness connector at the K9 Body Control Module.
Test for infinite resistance between terminal 11 and ground.
- If less than infinite resistance
1. Test circuit 4990 for a short to ground.
  - If a short to ground is found, repair the fault on circuit 4990.
  - Go to next step: If a short to ground is not found
2. Replace the S70R Steering Wheel Control Switch - Right.
- Go to next step: If infinite resistance
Test for less than infinite resistance between terminal 11 and ground while pressing and holding the S70R Steering Wheel Control Switch - Right.
- Go to next step: If infinite resistance
1. Test circuit 4990 for an open/high resistance.
  - If an open/high resistance is found, repair the fault on circuit 4990.
  - Go to next step: If an open/high resistance is not found
2. Replace the S70R Steering Wheel Control Switch - Right.
- If less than infinite resistance
Replace the K9 Body Control Module.