LED Reverse Bulbs Question...





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You should put a volt meter between the two terminals where the bulbs connect and confirm if there is voltage present
Last edited by mrmagloo; May 9, 2016 at 12:58 AM.
Also, I understand there are two different circuits driving the Reverse Lamps. One from the the shifter position, and one for the FOB.
On a 2000 M6, can someone please confirm what fuses are involved with with each circuit so I can attempt to figure out which has the 'power leakage'. At this point, I don't think it's the trans mounted switch, but figuring out which circuit is causing the issue will at least help me to focus on one or the other.
I have also sent out a few PM's to others who have previously reported the issue, hoping they can share a solution, but so far I've only got the aforementioned bandaids: resistor/hidden lamp, or the most popular, simply removed the LED's and went back to stock. I just cannot image that nobody has been able to identify the root cause here?
There are three possible scenarios for what is applying voltage to the backup lamps.
1. The circuit from the approach fuse is inducing a current into the backup lamp circuit.
This is not likely to be the case, because the approach circuit is hot at all times and if it was inducing a current, the lights would never turn off until the battery was drained.
2.There is a resistance fault in the circuit between the BTSI/BU Fuse and the backup lamps. This includes the back-up lamp switch and the perimeter lamp relay. (This is the condition I originally suggested checking for).
To check this condition, I would start by pulling the perimeter lamp relay, and check for voltage at the pin in the relay socket that corresponds to Pin F9 of Connector C3. This will be the pin that the input from the backup lamp switch is on. If you find voltage, then there is most likely a resistance fault in the backup lamp switch.
3. Some other circuit (unrelated to the backup lamp circuit) that is only hot in run is inducing a current into the backup lamp circuit.
(This isn't very likely, but still more likely than scenario 1)
Also, I understand there are two different circuits driving the Reverse Lamps. One from the the shifter position, and one for the FOB.
On a 2000 M6, can someone please confirm what fuses are involved with with each circuit so I can attempt to figure out which has the 'power leakage'. At this point, I don't think it's the trans mounted switch, but figuring out which circuit is causing the issue will at least help me to focus on one or the other.
I have also sent out a few PM's to others who have previously reported the issue, hoping they can share a solution, but so far I've only got the aforementioned bandaids: resistor/hidden lamp, or the most popular, simply removed the LED's and went back to stock. I just cannot image that nobody has been able to identify the root cause here?
I guess the fuses aren't much help as both are hot all the time while in run. You've helped guide me as to where to start. If I can't sort this out, and it seems to be the nature of the beast, I guess I will have to go the resistor route, but what I've read there is all over the map. One guy said to use 1K ohm 1 watt resistors, and another said to use the big honking 50 watt deals. I really don't want to go down that path unless I have to.
Thanks!
Last edited by mrmagloo; May 11, 2016 at 12:09 PM.
My guess would be the relay is something to be checked. Also, if cars are equipped with an reverse-camera setup, that may also cause the tiny voltage needed to light an LED dimly.
Also for the record, no reverse camera or anything else. Completely stock.



I just did the same! 






