Where are door ajar switches located?
#1
Burning Brakes
Thread Starter
Where are door ajar switches located?
I wanna rig LED lights into my door reflectors to come on when the doors are ajar. Where is the "door ajar" switch located on each door, and/or what's the best way to wire such lights?
#3
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Thanks for the info.
#4
Le Mans Master
It will not be 12 volts based on the resistor shown in the BCM.
You can test the LED for brightness by using the GRY/BLK wire before you do the final install.
Mr. Sam
#6
Le Mans Master
Yep, just not sure how much. Look at the BCM, it shows 12 volts and then a resistor (jagged line) feeding the GRY/BLK wire.
LEDs can be bright with even 5 volts. Don't over do the lights, the C5 is not designed with adding things to circuits except where they provide that feature in the I/P foot well.
Your "fuse" for the circuit is the BCM.
Mr.Sam
LEDs can be bright with even 5 volts. Don't over do the lights, the C5 is not designed with adding things to circuits except where they provide that feature in the I/P foot well.
Your "fuse" for the circuit is the BCM.
Mr.Sam
#7
Burning Brakes
Thread Starter
Would it be better to pull a wire through the rubber door accordion jamb tube (is that pretty easy?) and hook the door reflector lights up to the footwell light connector?
#8
Le Mans Master
Was not trying to scare you (just inform) but I didn't know how many LEDs were going in. My guess is the voltage will just be about 5 volts as it is really just a "signal". The BCM is just detecting a change in the circuit voltage as the switch is grounded.
You might have to use a lower voltage LED rather than a 12 volt.
I don't think one LED will adversely affect the BCM and it should not affect the signal so that it defeats the Door Ajar function.
You could use your alternative but if you are just putting in one LED I don't think you need to do that. Routing the wire at the door would be easy with some difficulty fishing it behind the console for the driver side door.
If you don't get the effect you want using one LED and the latch circuit then go with your alternative.
Mr. Sam
You might have to use a lower voltage LED rather than a 12 volt.
I don't think one LED will adversely affect the BCM and it should not affect the signal so that it defeats the Door Ajar function.
You could use your alternative but if you are just putting in one LED I don't think you need to do that. Routing the wire at the door would be easy with some difficulty fishing it behind the console for the driver side door.
If you don't get the effect you want using one LED and the latch circuit then go with your alternative.
Mr. Sam
Last edited by dadaroo; 12-28-2015 at 10:55 AM.
#9
Melting Slicks
There is plenty of space in the accordion tube to run a 2 conductor 16 or 18 gouge wire. The footwell lights, the orange wire is 12v and the black ground.
I have done this on 2 C5's.
Gary
Last edited by SilverC54me; 01-01-2016 at 07:22 PM. Reason: correct typo
#10
Le Mans Master
Gary's method will clearly give you better lighting and there will be no added current on the BCM.
If I were doing this I would use a coat hanger to push it behind the console and then pull the wire back thru. Just disconnect the battery so you don't accidently do something to short a circuit. Should not happen but better safe than sorry.
Mr. Sam
If I were doing this I would use a coat hanger to push it behind the console and then pull the wire back thru. Just disconnect the battery so you don't accidently do something to short a circuit. Should not happen but better safe than sorry.
Mr. Sam
#11
Melting Slicks
The door ajar signal voltage is "inverted" for your intended purpose and in addition to that, you would need to make sure its level doesn't fall below the threshold where the BCM might think the door is open when it is actually not.
The simplest solution would be what Gary suggested and tap into the footwell lights.