Circuit Description
Display dimming is controlled by the body control module (BCM) based on input
received from the dimming potentiometer. The dimming potentiometer is connected between
circuit 1359 and circuit 1381. The BCM monitors these inputs and provides a pulse
width modulated (PWM) output at circuit 8 to operate the display lamps.
Conditions for Setting the DTC
| • | Dimming potentiometer set at minimum brightness |
| • | Circuit 8 shorted to battery voltage |
| • | No light will illuminate in I/P. |
Diagnostic Aids
| • | Check for poor connection at the BCM. Inspect 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 wiring harness for damage. Check for broken or chaffed insulation. |
| • | Check for poor connection at the dimming potentiometer. |
| • | If fault is suspected to be intermittent, wiggling harness wiring may
help in locating fault. |
