07 GMC Yukon, Non denali, acc. lead

Printed From: the12volt.com
Forum Name: Vehicle Wiring Information & File Requests
Forum Discription: Request Car Alarm, Car Stereo, Cruise Control, Remote Starter, Navigation, Mobile Video, and Other Vehicle Specific Wiring Info, Manuals, Tech Tips
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=86369
Printed Date: October 31, 2024 at 7:16 PM

Topic: 07 GMC Yukon, Non denali, acc. lead

Posted By: snegri
Subject: 07 GMC Yukon, Non denali, acc. lead
Date Posted: November 28, 2006 at 9:24 PM

I just need a darn accessory power lead at the in cab fuse panel or under the dash....not in the engine compartment.

Oh yes...in the cold tried to find one with a lead and could not.

TIA

Replies:

Posted By: master5
Date Posted: November 28, 2006 at 9:29 PM

Accessory: brown or yellow + @ ign harn or BCM, lt. grn plug, pin 21

The BCM (Body Control Module) is to the left of the steering column.

-------------

Posted By: NowYaKnow
Date Posted: November 28, 2006 at 11:19 PM

Whatever your going to power off of it, you MUST use a relay. And yes the ignition harness accessory wire is about one of the only switch wires you will find in the truck.

Mike

Posted By: master5
Date Posted: November 29, 2006 at 1:57 AM

I would have to agree with that....in addition..the constant wire at the ignition harness is only rated for 2amp max. So for your main power on the relay input use either RED / black (60A max rated) at the fuse box, black 40 pin plug, pins F1 and E3, or go directly to the battery and install a fuse.

wire the relay as such.....30 fused to constant......85 to ground.....86 to accessory......87 to device....87a not used, insulate.

-------------

Posted By: Silvrefox
Date Posted: November 29, 2006 at 3:53 PM

Has anyone tried the one at the footbrake? I found a switched wire in that harness. Anyone use it?

Posted By: master5
Date Posted: November 29, 2006 at 8:54 PM

I haven't tried the footbrake but if it shows accessory (NOT ignition) regardless of the brake being depressed it might work..but I would not reccomend tapping into any wire on this vehicle until you can verify with 100% accuracy what the wire is for and it's current rating.

-------------

Posted By: master5
Date Posted: November 29, 2006 at 8:59 PM

BTW, just in case someone doesn't know the difference...

An ignition wire will show 12v+ with the key in the run AND start positions,and lose power when the key is off and acc position if equipped.

An accy wire will show 12v+ in accy position (if equipped) and run only. It will lose power with the in the off and start positions.

Push button ignitions are another story..you must verify those with a meter to know for sure whats happening.

-------------