Display Dimming Pulse Width Modulation Input Circuit
Table of contents
B2620 CADILLAC Possible Causes
- Faulty Headlamp Switch
- Headlamp Switch harness is open or shorted
- Headlamp Switch circuit poor electrical connection
- Faulty Body Control Module (BCM)
How do I fix code B2620 CADILLAC?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Cost of diagnosing the B2620 CADILLAC code
The cost of diagnosing the B2620 CADILLAC code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
B2620 CADILLAC Description
The Body Control Module (BCM) directly sends a 5-volt reference voltage to the Instrument Panel (I/P) dimmer switch which is then adjusted based on the I/P dimmer switch position and returned as a dimming return and dimming input to the BCM. The BCM uses this signal to directly control the desired level of instrument panel illumination lamp intensity.