For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 |

1. Using a J 39200 DMM, backprobe between body control module (BCM) connector C1 terminal D and ground.
2. While observing the J 39200 DMM, move either door lock switch to the UNLOCK position.

Is there continuity?

0ohms

Go to Step 2

Go to Step 3

2 |

1. Test for a poor connection at BCM connector C1 terminal D.
2. If OK, replace the BCM.

Refer to Body Control Module Replacement in Body Control Systems.

Is the repair complete?

--

System OK

--

3 | Repair the open in CKT 781, between the BCM and S268. Is the repair complete? | -- | System OK | --