Cadillac Repair Questions? Ask a Mechanic for Answers ASAP
Well It looks like you have two bulbs in the front of that system one major and one repeater. however they are controllled with output from the Bcm and it shows no fuse between the two. So Based on your info it looks like you may have burnt up your out from the Bcm and you may have not replaced the bulb that needed replacement.
Hi there, I am Cam. Can I get your first name please?With this issue happening and you replacing all the fuses, did you verify the wiring at the Body Control Module (BCM) is not shorted out? Power to the lights comes directly through the BCM as it controls the lighting from the fuses. If the BCM itself shorted out internally, this would be the result. So the first place to check is at the BCM, does it have any wiring that you can see is shorted? Does it have an odour to it?
Lonnie, yes it would. The Body Control Module (BCM) controls most of the lighting of the vehicle.
In this schematic you can see the signal lights. The second link is the power feeds into the BCM. Third is the panel to remove to get at the BCM and 4th is the BCM. Its directly under the steering column.
While I have not played with LED's as much with exterior, Is there not higher quality ones that build in a resistor to mimic the load of a regular bulb?
Otherwise we need to put the resistor in line with the bulb to add to the entire circuit resistance.
ok the programming is not something you can do. It requires access to the GM programming server along with the programming tool. For the resistor. Lets try your 100W 8 ohm resistor wired as pictured in the first diagram. your rear fuse blocks are under the second row seat. There is a wire to each that goes to the rear lights. For now, We can use the wiring that runs from the BCM to the rear lights. They are in the brown connector. Pin 1 is left and pin 2 is right. Attached is the connector end view for the brown BCM connector.
I am getting 2 different options, what is your VIN?
OK it does not show the wiring inside the light as they classify that as an assembly. But on the matching connector that plugs into it, Dark blue is the left signal supply wire and dark green the right.
The brown connector is indeed the BCM under the dash. IF you still have LED in the front, then it may show a dead ground, I would check and compare side to side and see what the other side shows.
That’s the big question. Because of the unknown load capacity or Ampacity of the BCM rear circuit, and the nature of our issue, its unknown if the rear will handle it, but one thing in our favour is the rear shows a trailer provision so I am thinking with a standard bulb it will work fine.
There rear fuse blocks are under the second row seat. If you go and look at the first schematic I provided, you will see a branch off each rear for trailer provision.
Yes run that wire to the green wire. No need to go to rear fuse blocks. Yes install resistor as per my diagram when you get it fixed. I don't think you missed anything. However the dark blue white wire in that brown connector pin 5 is the source wire to the front so jump it there and save yourself the wire.