Parking lamps 03 Trail Blazer

I usually go to the Large Harness under dash going to Firewall

The Gray / Black will show Negative when Switch is turned ON  Use a Meter

Parking Lamp

BROWN (+)

IN WIRE HARNESS UNDER STEERING COLUMN

MO

Don't Learn from Others Mistakes

You Might Be the One That Knows.

It will be the one with the purple next to it..... If all else fails, what does you multimeter tell you when you check the grey/black wires as you turn the switch from off to the parklight position???????????? It's one thing to just be an automaton and blindly hook up wires to wherever someone tells you to, it is another to actually know and understand how to look for these wires properly (leave the test light at home...... use a DMM). Gus Wherever I go, that is where I end up......

if you open the big loom under the column, the first wire you see is the brown, test it and you'll see......Kevin Gerry

Certified Electronics Technician

MECP First Class Installer

Owner/Installer

Classic Car Audio

since 1979

See.... and I usually get the brake when I do that....... Gus Wherever I go, that is where I end up......

i was born under a lucky cloud.... more often than not if there is a green wire listed and 30 of them in the location listed i usually  get it on the first or second try.....   if you open the split loom facing towards you on the ST6's (Envoy, TB,etc) the brown wire right on the edge is a hair thicker than the other browns and is the Parking brake wire.... Kevin Gerry

Certified Electronics Technician

MECP First Class Installer

Owner/Installer

Classic Car Audio

since 1979

Hey KGERRY. If your that lucky, can you buy me some lottery tickets? There are about 6 dark brown wires in that harness and I always seem to have to try them all before I find it. Thank god for volt meters. sparky

Man, it's just too easy to get the gray/black at the switch. I've never tried anywhere else, it's just too easy....Mike M2

Tech Manager

CS Dealer Services

Look for a dark brown wire in the large loom of wires that exit the vehicle through the firewall that tests 12V positive when you turn the light switch on to parking lights only. You should not need to use a relay as long as your RS wire for the parking lights is positive output. If you want your headlights to flash and then stay on after remote starting(instead of just your parking lights), tie into the white wire at the headlight switch - it's a negative wire, so you will need a relay to switch polarity if your RS parking light output wire on the RS is positive.The Badger

you can catch the bown wire at the fuse block under driver side rear seat. i think fuse #10D

MECP First Class Certified Installer.

Nothing is impossable, it's just more expensive.