Fault Description

+B Missing When +15 Is On:

Fault symptoms
Interior lighting does not go on when the key is removed from the ignition and no doors are open.

Conditions
+B missing when +15 is on

Diagnostic help
+B can be read with the scan tool.

Checking the wiring harness
Move the wiring harness at various points and in different direction to detect any intermittent breaks or short circuits. Observe the multimeter, test lamp or diagnostics tool while checking.