jirwin
Goblin Guru
That's concerning... I'll have to trace that one too.12v on the light blue when the brakes are on, 0v when they are off.
That's concerning... I'll have to trace that one too.12v on the light blue when the brakes are on, 0v when they are off.
Mine measures 7.34V with brake off and 12V with brake on. Not sure if having cruise control plays into that.12v on the light blue when the brakes are on, 0v when they are off.
Thanks, I'll keep that in mind. Mine had aftermarket cruise, so I'm not super worried about it at this point. Its a wish list item if I get the rest of the car working lol.Mine measures 7.34V with brake off and 12V with brake on. Not sure if having cruise control plays into that.
I do, thank you. I actually OCR'd it so it's searchable. Pretty nice. I'm just an amateur at this electrical stuff.Do you have a wiring diagram for your donor car?
You can trace the wire to the correct spot on the BCM.
Might be the same connection as my car's BCM, not sure... but you can check my wiring diagram.
Nevermind, that wouldn't make sense. Brake lights, duhI measure the brake position sensor by tapping the yellow sensor wire to determine if it works. It's reporting anywhere from 0 to 5v depending on position - as expected. No movement of the sensor affects the brake lights.
I'm really beginning to question if the turn signal lights are supposed to be hot by default and I just have incompatible lights.
The turn signals should not be "Hot by default". That said, they are a combo of turn and brake lights. The output of the brake light relay feeds to the 3rd brake light as well as back into the BCM to trigger the brake/turn lights as well. If you have an issue with the brake light circuit, then you will have an issue with the turn signals being lit all the time as well.I measure the brake position sensor by tapping the yellow sensor wire to determine if it works. It's reporting anywhere from 0 to 5v depending on position - as expected. No movement of the sensor affects the brake lights.
I'm really beginning to question if the turn signal lights are supposed to be hot by default and I just have incompatible lights.
Good thought, but now I'm more confused. Both of those light blue wires have power even with that pulled.Have you checked the fuse for the Park/ marker lights for the brown wire. I did not see the fuse mentioned. Sorry if it was.
Center of this picture 10A
Yeah I'll say. I'm thinking about using the multimeter to determine the start point where it works (by actuating it by hand off the brake). Then I might be able to either drill another mounting holes in the right location, or turn the screw hole from a hole to a "slot" or "elongated hole" so I can adjust it slightly and get it to the proper starting point. We'll see if that worksGlad to see you're making progress, I wish I would have seen this earlier as this is exactly the same problem I was having and mentioned it in the LED thread (http://dfkitcar.com/forum/index.php?threads/led-headlight-turn-signal-brake-wiring.1563/post-31669)
I have my switch installed quite loose and it's the only way I could get things to function as they should. Incredibly frustrating to diagnose
I literally just did the same thing last night. Drilled out the bolt hole to make it bigger and rotated the sensor a few degrees. Solved my problem for the most part. It's been raining here so I haven't been able to test it with the car running.Funny enough, I just ran into a similar issue - When the pedal position is out of range, the brake lights are activated after about 3 seconds. I am sure this is a safety feature. In my case the issue was simply that mounting the brake booster was mounted closer to the pedal than before because I was not running the foam washers between the brake booster and the bracket. This pushed the pedal closer towards the driver pushing the BPP sensor out of range. To better explain this, if the BPPS was calibrated so that the resting position of the pedal was considered "0" and the fully depressed value was "10", the position the BCM was seeing was "-1" (out of range) and as a result, it applied the brake lights. I think this may be the problem
jirwin is running into. For me, I was able to press the pedal just a tad, causing the lights to go out, then continue to push it a bit more, and the lights would come back on as the pedal was now within range.
I simply slotted the screw hole that holds the sensor so I could rotate it. I wanted to fix it "correctly" but running a BPPS Calibration on my particular BCM works to fix the brake pedal position issue....until the car lost power or sits for a while, then it lost the calibration.