Right Daytime Running Lamps Control Circuit
Table of contents
B2605 CADILLAC Possible Causes
- Faulty Right Park/Daytime Running Lamp
- Right Park/Daytime Running Lamp harness is open or shorted
- Right Park/Daytime Running Lamp circuit poor electrical connection
- Faulty Body Control Module (BCM)
How do I fix code B2605 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.
Tech Notes
- B2605 01 Right Daytime Running Lamps Control Circuit short to Battery
- B2605 02 Right Daytime Running Lamps Control Circuit Short to Ground
- B2605 04 Right Daytime Running Lamps Control Circuit Open
Cost of diagnosing the B2605 CADILLAC code
The cost of diagnosing the B2605 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)
B2605 CADILLAC Description
The ambient light sensor is used to monitor outside lighting conditions. The ambient light sensor provides a voltage signal that will vary between 0.2 and 4.9 V depending on outside lighting conditions. The Body Control Module (BCM) provides a 5 V reference signal to the ambient light sensor and the Heating, Ventilation, and Air Conditioning (HVAC) control module provides a low reference ground. The BCM monitors the ambient light sensor signal circuit to determine if outside lighting conditions are correct for either daytime running lights or automatic lamp control when the headlamp switch is in the AUTO position. In daylight conditions, the BCM will command the designated daytime running lights ON. During low light conditions, the BCM will command the low beam headlamps ON. Any function or condition that turns on the headlamps will cancel daytime running lights operation.