Hi,i would like too know what is the purpose of the little black wire that come out of the bcm, the black box have 3 plug to connect wires but just 1 black wire is going out of the bcm box and is going in the big cable full of wire ,i have pull gently on it to resolder it after taking out the bcm and the black wire came off of the big cable holder ,i don,t know if this is a antenna or a ground ??is somebody know what is it ? thank,s

pics would probably help.




car audio noob since 1984.

The single wire on its own (not in a connector), is the antenna cable for the BCM receiver (keyless entry).