For 1990-2009 cars

### Circuit Description

The body control module (BCM) compares the state of the park lamp circuit 9 to the high beam headlight circuit 1200 and the low beam headlight circuit 1201.

If the park lamp circuit is grounded/open and either the low beam circuit is at battery voltage or the high beam circuit is grounded, diagnostic code B2662 will set.

### DTC Parameters

• | The headlight switch is ON.

• | Circuit 9 is grounded or open.

• | The conditions are present for 1 second.

### Diagnostic Aids

• | Check for a poor connection at the BCM. Inspect the harness connectors for backed out terminals, improper terminal mating, broken connector locks, improperly formed or damaged terminals, and poor terminal-to-wire connection (terminal crimped over wire insulation and not conductors).

• | Inspect the wiring harness for damage. Check for broken or chaffed insulation.

• | Check for a poor connection at the headlight switch.

• | If a fault is suspected to be intermittent, wiggling the harness wiring may help in locating the fault.