Join Date: Nov 2006
Location: New Jersey
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I checked DRL status with my new Techstream software and the daytime running light function is, in fact, enabled in the ECU but they still aren't coming on.
I'm most suspicious of the parking brake switch contacts since that's what foghorn narrowed it down to. But I jiggled the parking brake lever around to check for a loose connection but there was no response at all from the DRL. When I release the parking brake lever the dashboard brake light goes out normally. Does the DRL function use a different sensor/switch for the parking brake status than the one that controls the dashboard brake light?
Finally, if it doesn't come down to the parking brake switch contacts, is there a separate fuse controlling the daytime running lights? Separate from the regular headlight functions, that is? My low & high beams work normally when the lights are manually turned on.