Quote Originally Posted by Strap
Pyro

Use 2 relays for the parking lights , get them at the dash switch 2 grey wires right and left ( dont connect them together ) they will only flash outside the car not the instrument cluster.

+12v @ # 87 & 86
- 12v from keyless/alarm to 85
And 30 is the output to the parking light wire.

And the horn output is for the cars horn ,All newer cars 90 and up use -12v for the horn at the colume thats why its -12v output.

But bmw use a positive and its a pain in the ...
Strap
wait what do the numbers mean (87, 86, 30, and, 85)