Join Date: Apr 2010
Location: Dallas, TX
Vehicle: 07' SLK55 AMG (R171)
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanked 13 Times in 9 Posts
ELK + BLM Information
When trying the above with the ELK(Extreme Lighting Kit) + BLM;
Failed Config #1
I've wired the BLM as you've suggested; Attach both BLM-Brown & BLM-Blue wires to the Car-Brake-Light wire[grey/blake]. But I am getting the "tail left light aux" error on my dash that I think you described when you were wiring them separately, this error then comes up after the WR powers on for a second, then the WR goes off, and so does the brake lights for that side of the car, they remain off until I clear the error which requires I turn the BLM toggle switch to the OFF or 9V DC power option (anything that disables the BLM to that circuit).
Even in this setup, my Windrestrictor doesn't power on until I turn the BLM knob about 75% of the way, at which point it powers on and then instantly trips the "tail left light aux" error. Until it trips the error, the WR does not power on, at all. The WR then proceeds to power on and off every often.
Using the 9V DC power option, the WR works tho, so the wiring on the WR seems correct enough to light up.
Failed Config #2
Giving up on using the BLM I decided to just wire the extreme lightning kit(ELK) without the BLM to test my wiring. Unfortunately I got the same result as before. I did get a slightly different error code on the console since I'm running the +12V from the running lights wire on the harness instead of the brake light wire in this configuration with the ELK only. I'd start the car and the WR would come on for a moment, then go off, then go on/off, while a status error code would appear on my dash.
*** UPDATE ***
After talking to the great folks @ Windrestrictor.com, I learned ELK Lighting kits require more power than the single color WRs, so odds are I'm going to need to provide the 12V+ power from a source other than the harness.
It would make sense given what the original poster said about the R171's tolerances for voltage changes to the wires in the harness.
Tonight I will just tap into one of the 12V fuses in my console and run a wire to the trunk, in theory this will provide the WR will all the juice it needs, and if it works without issue, I can go back to finding a way to use the BLM.
I have attached the SLK R171 Fuse Box Mappings for all 3 Fuse Boxes.
Last edited by Nullsign; 08-06-2010 at 03:07 AM.