2015 gmc parking lights
Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=138618
Printed Date: April 27, 2024 at 2:33 PM
Topic: 2015 gmc parking lights
Posted By: ziggyb222
Subject: 2015 gmc parking lights
Date Posted: March 08, 2015 at 10:55 AM
Doing a 2015 Gmc Sierra work truck six cylinder.. Testing the the
GREEN/ grey wire white plug at bcm...Shows 12 volts all the time...unless you turn the switch all the way counter clockwise..the it goes to zero... And I looking in the right place..no othe green grey in that plug
Replies:
Posted By: howie ll
Date Posted: March 08, 2015 at 12:09 PM
Do you need a relay to break the wire?
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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.
Posted By: ziggyb222
Date Posted: March 08, 2015 at 12:13 PM
Howie...putting in a Evo All with t-harness..the Evo puts out a negative parklight...am I just being confused....Testing the wire..shows 12 volts all the time...unless you turn it all the way off..then it drops to zero...
Posted By: howie ll
Date Posted: March 08, 2015 at 12:14 PM
Does the EVO work?
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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.
Posted By: ziggyb222
Date Posted: March 08, 2015 at 12:19 PM
Yes..it starts the truck with the three x lock...from the OEM fob..that is all fine...Every guide I have looked at says light green grey in the white plug at the bcm...just not sure why it does not go to zero volts when I turn on the parking lights???
Posted By: howie ll
Date Posted: March 08, 2015 at 12:22 PM
Negative switching?
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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.
Posted By: ziggyb222
Date Posted: March 08, 2015 at 12:37 PM
the module seems to be putting out a negative signal...
Posted By: howie ll
Date Posted: March 08, 2015 at 12:46 PM
Then that's your answer, not cut, apply a ground.
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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.
Posted By: ziggyb222
Date Posted: March 08, 2015 at 4:40 PM
I am still confused.... checking the wire while the lights are in auto it shows 12 volts... when you switch to parking lights and the lights come on it still read 12 volts.... What am I missing...or Iam I just having a brain cramp????
Posted By: Ween
Date Posted: March 08, 2015 at 4:59 PM
https://www.gmupfitter.com/files/media/photo/578/Sierra_Silverado_Electrical_Body_Builders_Manual_Service_Manual_2015_en_US.pdf pages 20, 43, 487, 488
Posted By: ziggyb222
Date Posted: March 08, 2015 at 5:06 PM
Cannot access that....error
Posted By: Ween
Date Posted: March 08, 2015 at 5:25 PM
Posted By: bs1d3
Date Posted: March 09, 2015 at 6:53 PM
Are the parking lights working correctly through the switch? I somehow managed to bend a pin at the BCM while working on a '14 Impala the other day and it took me a good hour to figure out what I did. Not saying that's the case here but it might be worth checking out.
Posted By: ziggyb222
Date Posted: March 09, 2015 at 9:13 PM
yes...working fine!!!!!!
Posted By: davep.
Date Posted: March 11, 2015 at 4:00 PM
Looks like connector X5, pin 24 Blue, at BCM is a neg trigger for the park lights relay. I'd probably diode isolate the BCM from the RS.
Thanks for that link, Ween. Very helpful.
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