2005 envoy wire location

I am looking for the parking light wire and the +dome light indication that will go into the 455G interface which will then convert it into a - input going to my alarm.  The diagrams that I have say under rear seat at fuse box.  How can I access these wires?  Fuse box is giving me a hard time to remove and not sure if I want to remove it.. It has the cpu ribbon cable connected to it.  Also I notice that when I arm the vehicle, the security light flashes for about 20 seconds.  Is this normal? The parking light output and domelight is the only thing I have left.  The 455G activates the parking lights only when arming and disarming, not when alarm is set of by impact thats why I need the parking light wire.   Any input will help.  Thanks.....

parking light is brown in the larger loom of wires crossing under the steering column... domelight, grab at the light in the headliner on the drivers side... takes 5 minutes....run it down with your antenna cable....Kevin Gerry

Certified Electronics Technician

MECP First Class Installer

Owner/Installer

Classic Car Audio

since 1979

Below the ignition wiring, there is another harness that runs left to right. Parking lights negative is gray/black, tach is thin white, brake is thick white-------there are several wires of each color; test carefully to verify. As kgerry said, it is easy enough to just grab door trigger at the light above the driver's head. If you look closely, there is a place to insert a screwdriver and pop the light out.......pull the weatherstripping away from the door opening, and it will be easy to run your wire.

I will just mirror what they say don't waste your time with the rear fusebox. Oh and by the way Chris mentioned the brake as being a thick white. I know he knows this, but the thick white in that harness is your ignition 2 wire, the brake is just a medium sized wire, and the tach is one of the many smaller white wires. Here I thought I was the only one stubborn enough to test all those white wires! Good luck, Mike