Intermittent Issues

[Dan107]

I have a 2008 Chevy Trailblazer and I had issues with my key fobs, rear license plate lights and the rear tail gate not working.
matter reading some of the threads in here it was the same issue as most of you had with broken wires in the boot. I fixed all of those wire and everything worked great for awhile, but now it seems like all those same things stop working again and then start working like they should. I tore the boot apart again and looked at all the wires which were fine can this be the tailgate module intermediated working/not working.
Any help would be appreciated.
Thanks Dan

 

[Maverick6587]

Welcome to GMTNATION!

Are you getting any check engine lights for anything?
Have you checked to see where you're losing power going back/inside the tailgate?

I had the exact same problem and it ended up being my rear window defroster was not attached to the glass properly, so don't forget to check that connection.

 

[Dan107]

No Check engine light is on but now that I think of it I will check power going into the lift gate module and make sure that is good. I was thinking it could be that module just going bad.
I will let you know after I Check it.
thanks for the help much appreciated.

 

[budwich]

"looking at wires" is like looking at women... they could be good or bad... get a meter and check the electrical conditions at the connector in the lift gate.

 

[Dan107]

If the connections are good then I can probably say it could be the lift gate module, right?

 

[budwich]

you can even do some equivalent electrical tests of the same pins to see if they "make sense" which will tell if indeed the module has issues.

 

[Dan107]

I will test each pin to ensure power and grounding, is that what you meant?

 

[mrrsm]

Not being critical... just curious... What method did you use to re-connect the Colored Wires in The Boot? Your success with things working immediately afterwards...and then failing makes me think that re-visiting the repair could be very revealing.

The Best Method is to use Auto Quality Heat Shrink Tubes slid along the separated wires and then Soldering them together. After that... using a Butane Lighter or even Wood Matches... Heat Shrink the protective tubing sections down until the Sealant bubbles out of both ends of these repaired connections.

Avoid using common Butt Connectors, Wire Acorns and Common Electric Tape as All Three WILL let you down in Motor Vehicles due to excessive motion and vibration constantly attacking those connections.

Take a moment to review THIS Thread for relevance to this very same problem:

2002 Envoy Electrical Issues Related to Liftgate

Similar to other threads I've read, I've got problems with my 2002 Envoy (rear wiper and washer out, keyless remote not working, Retained Accessory Power out, license plate lights out -- don't hear any clicking or noises but frankly my hearing is poor). However, I'm currently stuck in my...

gmtnation.com

 

[Dan107]

I soldered the wires back together in the boot then put electrical tape around each connection and then tapped all the wires with more electrical tape.
I’m going to tear into it again tomorrow, I just purchased heat shrink tubes to put all the wires back together the correct way and see how that works out for me. Sounds like that could be the issue right now.