Conditions for Setting the DTC
WARNING: This page is about a different car, the 2003 GMC Sonoma, 2003 GMC Jimmy, 2003 Chevrolet S10 Pickup, and 2003 Chevrolet Blazer. However, it is still accessible from the selected car via links, so may be relevant.
- The BCM commands the DRL relay ON under the following conditions:
- An open exists in the headlamp dimmer switch high beam signal circuit.
- The headlamp dimmer switch high beam signal circuit is shorted to ground.
- The headlamp dimmer switch high beam signal circuit is shorted to battery voltage.
- The system voltage is between 9.0-16.0 volts.
- The above conditions exist for 0.5 seconds.