Random issues,?
Key fobs not programing, when i click program it just litterly flashes it dorsnt go to the part where you press the lock n unlock buttons. Also the rear hatch doesnt work if I apply power to the fuse it unlocks by itself... any ideas?
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Re: Random issues,?
sounds like a short somewhere this could be why the keys are also not programing
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Re: Random issues,?
Yeah its a short somewhere but I can't find it. I've looked everywhere. It's backfeeding circuits and everything n u ripped the entire truck apart
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Re: Random issues,?
did you check the ground wires under the truck on the chassis could have an open ground wire causing power to funnel via the power locks system
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Re: Random issues,?
something I found odd on my truck when I had a trailer turn signel fuse out, was it sends power thru the relay first and then to the fuse so like power at the fuse was only there when the light was on.. your test light would flash with the turn signal, very odd and never seen it wired like that before. but looking at the diagram, that's just how it's wired.. so I pulled up the lift gate motor and it's the same way, fuse is after the relay. so putting power on the fuse puts power to the motor.
fuse 44 of this diagram. I'm guessing you need to check for power and ground at the bcm pin 1,3 and input of 13? https://cimg3.ibsrv.net/gimg/www.gre...5c25557afc.png |
Re: Random issues,?
Originally Posted by ???
(Post 276946)
something I found odd on my truck when I had a trailer turn signel fuse out, was it sends power thru the relay first and then to the fuse so like power at the fuse was only there when the light was on.. your test light would flash with the turn signal, very odd and never seen it wired like that before. but looking at the diagram, that's just how it's wired.. so I pulled up the lift gate motor and it's the same way, fuse is after the relay. so putting power on the fuse puts power to the motor.
fuse 44 of this diagram. I'm guessing you need to check for power and ground at the bcm pin 1,3 and input of 13? https://cimg3.ibsrv.net/gimg/www.gre...5c25557afc.png |
Re: Random issues,?
Originally Posted by ???
(Post 276946)
something I found odd on my truck when I had a trailer turn signel fuse out, was it sends power thru the relay first and then to the fuse so like power at the fuse was only there when the light was on.. your test light would flash with the turn signal, very odd and never seen it wired like that before. but looking at the diagram, that's just how it's wired.. so I pulled up the lift gate motor and it's the same way, fuse is after the relay. so putting power on the fuse puts power to the motor.
fuse 44 of this diagram. I'm guessing you need to check for power and ground at the bcm pin 1,3 and input of 13? https://cimg3.ibsrv.net/gimg/www.gre...5c25557afc.png |
Re: Random issues,?
I can try and see if there's a trouble tree but my first thought was test relay that's before the fuse, if good, back trace to where the bcm is controlling that relay, if there's no output there, these the into it to the bcm from the switch. if you have the switch signal to the bcm, and still no output from the bcm, then you're into bigger problems stuff. but I'd check those inputs and outputs first.
I mean by putting 12v on the fuse you simulated the relay closing and the motor working so you just cut your circuit in half and confirmed that half is working correctly. now you gotta test the control side. |
Re: Random issues,?
looks like a few things can block it from working, anything from the switch being in the off position to the rear glass being popped, it then won't open the hatch. it does say the scan tool can be used to activate the hate too, that would rule our a bcm being bad.
https://cimg7.ibsrv.net/gimg/www.gre...c714c94113.png https://cimg8.ibsrv.net/gimg/www.gre...1a08750ad5.png https://cimg9.ibsrv.net/gimg/www.gre...0b9c6db762.png |
Re: Random issues,?
Thats for regular tahoes....hybrids dont have hinged glass or power gate as far as i know... my issue is i cant open it whatsoever
Originally Posted by ???
(Post 276983)
looks like a few things can block it from working, anything from the switch being in the off position to the rear glass being popped, it then won't open the hatch. it does say the scan tool can be used to activate the hate too, that would rule our a bcm being bad.
https://cimg7.ibsrv.net/gimg/www.gre...c714c94113.png https://cimg8.ibsrv.net/gimg/www.gre...1a08750ad5.png https://cimg9.ibsrv.net/gimg/www.gre...0b9c6db762.png |
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