2003 Silverado Problem

I just finished installing an alarm on my g/fs truck...a 2003 silverado and i have two problems. 1. I could not find the wire for the parking lights. All over this sight it says the gry/blk wire on the brown connector at the BCM. i found with an multimeter, that this line has a constant 12V on it. When the lights are turned on, it drops to 0 then right back up to 12V. Hooking the wire from my alarm does nothing. 2. If i try to alarm the vehicle right after getting out, it is fine for a few seconds, then my transmitter chirps (its a two way alarm system), and the siren chirps a few times. I then have to re-arm the system. It also does this if i try to rearm it right after i disarm it. thanks if anyone can help.

grey/black NEG(-) at the switch.

but the lights have a negative trigger. The alarm has a positive trigger. Am i gonna have to use a relay or is there a way to positively trigger it

One Kwick SS wrote: but the lights have a negative trigger. The alarm has a positive trigger. Am i gonna have to use a relay or is there a way to positively trigger it

If your alarm doesn't have a way to trigger pos OR neg, you'll need to use a relay to change it to neg.

i figured it out, i just ran it up to the brown wire on the bulb harness lol. They are all tied together so it lights all 4 corners.