turning off running lights
Tech Contributor
Joined: Dec 2003
Posts: 19,384
Likes: 87
From: Horncastle Lincolnshire, England
2023 C5 of the Year Finalist - Unmodified
I pulled the relays and put in a small piece of a cut business card to keep the relays from contacting years ago and don't have the codes. Wouldn't care if I did, when I swapped out to the black/amber Depo housings the old housings were burnt up bad and had cracks in them that allowed water in. My fathers '98 is on it's 9th or 10th set of front lights, I've never replaced the bulbs in mine since I disabled the DRLs. If you like the DRLs great leave them on and replace the bulbs regularly, it generates the type of discussion like BSMs
B0502/B0507
The BCM provides control for the DRL relay circuit. The BCM grounds the DRL relay control circuit in order to energize the DRL relay and turn ON the turn signal. This allows the turn signal to be used for DRL, UTD, and approach lighting functions. The BCM monitors the voltage level on the DRL relay control circuit. When the BCM commands the relay ON, the voltage level on the DRL relay control circuit should be low. When the relay is OFF, the voltage on the DRL relay control circuit should be high. If the BCM detects a voltage level other than expected,a malfunction is present and a DTC will set.
Last edited by DeeGee; Feb 13, 2012 at 02:49 PM.
Burning Brakes
Joined: May 2002
Posts: 831
Likes: 0
From: Albuquerque NM
I don't doubt what your saying, but I don't know why mine doesn't set the codes. Just went to the garage and checked. Nothing for the BCM, just the usual ones for the SCM LDCM RDCM (Which is caused by the topdown tech plug I believe, never have those when I leave it unplugged) I would think my vette would have those codes, Its had EVERY single common issue with other vettes so far
Tech Contributor
Joined: Dec 2003
Posts: 19,384
Likes: 87
From: Horncastle Lincolnshire, England
2023 C5 of the Year Finalist - Unmodified
I don't doubt what your saying, but I don't know why mine doesn't set the codes. Just went to the garage and checked. Nothing for the BCM, just the usual ones for the SCM LDCM RDCM (Which is caused by the topdown tech plug I believe, never have those when I leave it unplugged) I would think my vette would have those codes, Its had EVERY single common issue with other vettes so far
