Left Front Turn Signal Monitor Circuit
Table of contents
B2583 CADILLAC Possible Causes
- Faulty Left Front Turn Relay
- Left Front Turn Relay harness is open or shorted
- Left Front Turn Relay circuit poor electrical connection
- Faulty Body Control Module (BCM)
How do I fix code B2583 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 B2583 CADILLAC code
The cost of diagnosing the B2583 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)
B2583 CADILLAC Description
The Body Control Module (BCM) monitors the Left Front Turn Signal Circuit in order to determine the status of the turn signal switch. If the BCM detects an oscillating voltage on the LH turn signal monitor circuit, the BCM interprets this as a LF turn signal ON request from the turn signal switch. The BCM will de-energize the LH DRL relay, which will disable the LF turn signal lamp (which is ON for the DRL), this allows the LF turn signal to flash. If the BCM does not detect an oscillating voltage on the LH turn signal monitor circuit, the BCM interprets this as the LF turn signal being OFF. The BCM will then energize the LH DRL relay and continue normal DRL operation. The BCM monitors the LF turn signal monitor circuit and determines how long voltage is applied. If the voltage is applied for longer than expected, a malfunction is present and a DTC will set.