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Old 09-26-2005, 02:31 PM   #1
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Default 2000-2004 DRL vs 2005 DRL

I've noticed the 2005 Bonnevilles now use the low beams instead of the high beams that the 2000-2004'* used. Does anyone know a modification or a reprogram that can be performed to convert older years to the 2005 setup?


Thanks in advance!
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Old 09-26-2005, 09:18 PM   #2
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There are no known modifications for this, also re-programming is out of the question as it is not a programmable function. It would all be in hardware (wiring& relays) re-configuring. I'm not saying it can't be done, however you are looking at alot of surgery and wire switching. I'm assuming you have a 2005 Bonneville? What trim level?
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Old 09-27-2005, 01:15 PM   #3
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No a 2004! I'm assuming that it is a BCM reprogram, possibly using a similiarly equipped 2005 VIN#, as the BCM is the same for 2000 to 2005 & that is what controls the DRL'*, to my knowledge at least!
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Old 09-27-2005, 09:43 PM   #4
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Well, this is a very brief description of DRL as we know on 2000-2004'*. The ambient light sensor determines daytime/nightime condition, if daytime, the DRL relay is picked up via the Dash Integration Module DIM. The DRL relay places the high beams in series by switching power & ground, each high beam dropping half voltage. When ambient light sensor determines nightime condition DRL relay drops out, high beams turn off. Twilight Sentinel takes over to turn on the lowbeams & rest of exterior lighting. In normal high beam operation, the high beams are paralleled through the high beam relay and have full potential across them. Hope this helped a little. To the best of my knowledge, there are no programmable functions here regarding the DRL, Twilight Sentinel or low beam operation.
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Old 09-30-2005, 11:10 AM   #5
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Thanks for the input, I'll leave well enough alone then, especially since it is under warranty! Much thanks again!
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Old 10-06-2005, 10:41 PM   #6
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Would you not rather have the high beams used for drl'* since they are used less often. If your low beams were converted I would think they would burn out faster since they would be used for both daytime and nightime driving, therefore 50% more use (even if at half brightness). I'd stick witht the high beam oem configuration.
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