Chevrolet TrailBlazer Electrical Problems
HI I have an 02 Trailblazer,..I am now having some weird problems and was hoping someone might have some insight to help me on this forum.
Truck was running fine,..I use my truck for work. So I take things out of the back of my Tailgate all day long. Well it started when I opened my tail,..and I looked at the dash and I had lights on and the radio went off? Well when I slammed the tail..the lights went off on the dash and the radio came back on.
So then a day came when it started raing...thats when the all the idiot lights came on in the dash.. The car continued to run and the speedomter worked, but the power windows did not, neither did the gas gauge,oil,battery,air conditoner,power locks and back wiper. or radio. Next day the rain stopped and everything worked fine. Now its only when it rains..I lose power to everything I just mentioned but the headlights and tailights still work.
I had someone put it on a computer to get the codes, the codes go to the tailgate control module. Not the one behind the driver seat..but was told its the one in the tailgate itself.
I then had someone who had access to a Tec 2 ( GM Tool) see if it would come up with anything. They said they found the errors...but the Tool could not communicate with the Tailgate Module??My question here is has anyone had this kind of problem,..and do you think it sounds like the tailgate module is the problem....or is there somewhere else I should check before I spend the money on a brand new tailgate module??The thing that is fishy is that i was told that the body control module ( behind the drivers seat) controls some of those idiot lights,..and the tailgate module controls the others? I had the Tec 2 communicate with the body control module and it couldnt communicate with the rear tailgate...which is why I am so pluzzled? One GM Mechanic told me to put in a new ignition switch as thay have that problem all the time at the dealership..so I did...still have the problem? Anyone??
thanks in advance
-Robb
Truck was running fine,..I use my truck for work. So I take things out of the back of my Tailgate all day long. Well it started when I opened my tail,..and I looked at the dash and I had lights on and the radio went off? Well when I slammed the tail..the lights went off on the dash and the radio came back on.
So then a day came when it started raing...thats when the all the idiot lights came on in the dash.. The car continued to run and the speedomter worked, but the power windows did not, neither did the gas gauge,oil,battery,air conditoner,power locks and back wiper. or radio. Next day the rain stopped and everything worked fine. Now its only when it rains..I lose power to everything I just mentioned but the headlights and tailights still work.
I had someone put it on a computer to get the codes, the codes go to the tailgate control module. Not the one behind the driver seat..but was told its the one in the tailgate itself.
I then had someone who had access to a Tec 2 ( GM Tool) see if it would come up with anything. They said they found the errors...but the Tool could not communicate with the Tailgate Module??My question here is has anyone had this kind of problem,..and do you think it sounds like the tailgate module is the problem....or is there somewhere else I should check before I spend the money on a brand new tailgate module??The thing that is fishy is that i was told that the body control module ( behind the drivers seat) controls some of those idiot lights,..and the tailgate module controls the others? I had the Tec 2 communicate with the body control module and it couldnt communicate with the rear tailgate...which is why I am so pluzzled? One GM Mechanic told me to put in a new ignition switch as thay have that problem all the time at the dealership..so I did...still have the problem? Anyone??
thanks in advance
-Robb
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Comments
Is there a reset button or something that I missed?
any ideas or comments....... :lemon:
Thanks
1. Light bubs under radio switches went out.
2. Electrical circuit that hooks up to the light bulbs is bad
Changing fuses will not help
jt
I have been a long time GM customer but I am now considering replacing my Chevy with a foreign fullsize (they seem to stand behind their product better).
Mike
-Sounds and feels like driving on rumble strips at 45-70mph LOUDLY.
-Tranny intermitant shifting problems
-Mild intermitant vibration at 35-70 mph in gas pedal
-Diminished Eng Capacity Light comes on and off
- Intermitant 12mph max speed
-Speed/Power cuts out randomly (no more acceleration regardless of gas pedal pressure)
-Trac light intermitantly on
-Check engine light intermitatly on
-Clock auto resets itself occasionally
-CD randomly pops out on startup or shut down or while driving
-Vehicle shakes and chugs worse than a disel pickup on start up occasionally
-Cruise control sometimes quits on its own
-Replaced transmission pump/ignition switch
-Torque converter locking up (tech told me potential problem)
-Starter sometimes has issues, turn key and nothing...no click, hard turnover, nothing then wait 10-15 seconds and without touching the ignition switch the truck starts.
-Continually warping rotors
-Clunk on occasion when shifting from "P" to "R" or "R" to "D"
-After startup while idling sometimes there is a loud clunk from the passenger side sounds like someone is kicking the side of the truck
-Windows intermitantly work powering up
-Transmission "whistles" when rpm's going up to shift occasionally
-Radio/CD sometimes just shuts off
That's about all I can think of off the top of my head I have had it in the shop at least 50 times in the past year and they keep telling me their computer doesn't say anything.....last week it lit up like the 4th of July but they still couldn't figure out why all the problems. If anyone can help with ideas that would be great, I don't know what else to do. It is all still under warrenty thank goodness!!!
They now found coroded wires, replaced the starter, replaced throttle body, new stereo is on order, replaced the weather stripping, two speakers, and the vibrations, whistling, revving and other shimmying is still an issue. I did some digging and found out that my vehicle HAD been in an accident (the dealership told me it had never been) only 27 days before I bought it in 06! It hit a deer at 60mph, could this be part of the problems with it????
Does anyone know if I can pull up all the parts ordered for my vehicle by the vin?
After I had a GM Mechanic look at the truck. They put it on the Tech 2 ( GM Computer Tool)he found out that the trucks back computer the BCM was communication with the other computers in the car so they could not get any error codes from the memory so that they could properily diagnosis the problems. His suggestion...change the ignition switch. Why I asked? Because all the electrical problmes coming were fixed once that was changed. OK so I did that. Nothing fixed. Changed the BCM ( back computer...still not communicating with the other computers in the car nor is letting us getting the error codes from the computer.Changed the leadlight switch,..changed the windshield, pulled all the seats out of the trcuk ripped the carpet out and followed every wire in the whole truck to look for breaks or splits in the wiring. Checked the harness behind the firewall....still nothing.
Getting ready to sell the truck...I opened the hatch..looked into the truck and said let me get a screw driver and popped down the headliner.Looked in with a flashlight,saw a bunch of wires that I guess had something to do with my moonroof.put my hand in and then all of sudden " Booom"...I heard my power door locks go up & down. Which was one of my big problems. I pulled the wires out found the wire that was connected to the door locks...shortened the wire and reconnected it and then ...all my problems were gone. Another reason why I am so unhappy with my Truck this will most likely be the lastGM product I ever buy, becaus eof the lack of knowledge of the GM mechanics,..the GM Schmatics...and just the attitude of the mechanics. I was told by the mechnic that if I left it in the dealer shop...that I better have more money then time to get it fixed. Not what I wanted to hear.
I hope this helps anyone else.
All the Best
-Robby
Sorry to see what the problems were,.. I am the first post on Page 1 of this thread.
tidester, host
SUVs and Smart Shopper
My delaership replaced the ignition switch for $550. On the final test drive the issues appeared again, however the tech had my back seat folded up for access to the rear floor panel. He noticed that when he hit bumps the electrical issues started again. The seat was bouncing on the wire harness under the rear mat. This caused lose connections and intermittent issues. They rewired the harness on the rear floor, moved it to the side and put some extra padding on the floor to cover the worn harness. Repaid me on the labor part of the ignition switch. This was 6 months ago and everything seems OK.
However my speed o meter motor just went out, not related, and I had to replace my cluster....this is a fault of the poor quality servo motors.
Now only issue is my driver seat is not working on the forward and reverse mode, making it tough for my wifr to drive. Any ideas on seat issue?
However, the one thing that I didn't notice is that I opened my hatch yesterday to get something out of it. Interestingly enough this could be the cause. Because the second time I opened the hatch to get the jumper cables out (problems got worse). I didn't make the connection. I am going to have the car towed to the dealer(provided no one has stolen it since I had to leave the key in the freaking ignition overnight at my office) and I will have them start with this problem first. Will post again if this in fact was the problem. Thanks again as I was totally confused as to where to start. Battery, ignition, starter(had that replaced last year) etc...
Help! It is scary that these problems keep happening. We travel a lot and I am the mom of the family, so I always have kids...it is getting really inconvenient to have this thing towed to the shop every 2 months! Thanks for your time! :lemon:
Then I had to get gas, that is when all the fun started. All the dash lights came on, the only gauges that were working is the speedometer and the tachometer. The gas, oil, temp and battery gauges are dead, the blower works, the a/c doesn't, the locks do not work, the cigarrette lighter does work, the front windows do not work, the power seat does work. The radio does not work.
I read that it could be a relay and i changed several of them and that is not the issue..I am guessing ignition switch again? :mad:
So he was able to find a used one and will install it, but it needs to go to a dealer and have it programmed.
There is light at the end of the tunnel.
gonzo
For me it turned out to be a corrosion issue with the connection from the wiring harness to the computer. The connector to the computer was not only corroded but melted as well. my mechanic says that it is poor design with having the computer so low to the ground and so close to the engine. Good luck.