- May 4, 2014
- 5
I see that this is a much talked about topic: 4WD Service light on. So I did what I could already, but I don't see any common "next steps" from where I am at now.
I have a 2003 4.2L v6 trailblazer.
When I switch 4 wheel drive switch to anything other than 2Hi the 4WD Service light comes on. I can also tell that the 4 wheel drive isn't engaged from how it feels when I turn in a tight radius. Common problem, I know. I just don't know where to go from here.
So I tried all of these:
1) pulled fuse #8 (front box) and #45 (rear seat box) fuses for a minute.
2) disconnected the battery completely for 15 minutes
3) replaced front axle actuator
Turning the 4wd switch: 2hi to A4wd I get a lower whirring sound, A4wd to 4hi I get a quicker and louder whirring sound, 4hi to 4lo I get no sounds. (The mode lights turn on and off normally as I change mode.) I do NOT hear the "cluck" sound some people say I should hear.
Possible causes: I jumped someones car and a couple weeks later (I am guessing) my battery went dead. I replaced the battery in my car and a few days later (could have happened earlier I'm not sure) all works fine except the 4wd.
I'm thinking I need to do one of the following. Which do you think I should do? Is there an inexpensive way to do it? Are there any other tests I can perform to narrow this down?:
a) replace the Transfer Case Shift motor.
b) flash/reprogram the 4wd system
c) replace the encoder motor.
d) replace connectors and wires between various 4wd systems.
... or if you have another idea for my next step please feel free to mention it.
I am a DIY'er, mechanically minded, I know a little about cars, but I'm not a true car guys.
Thanks!
ps - just came over from trailvoy.com as suggested.
I have a 2003 4.2L v6 trailblazer.
When I switch 4 wheel drive switch to anything other than 2Hi the 4WD Service light comes on. I can also tell that the 4 wheel drive isn't engaged from how it feels when I turn in a tight radius. Common problem, I know. I just don't know where to go from here.
So I tried all of these:
1) pulled fuse #8 (front box) and #45 (rear seat box) fuses for a minute.
2) disconnected the battery completely for 15 minutes
3) replaced front axle actuator
Turning the 4wd switch: 2hi to A4wd I get a lower whirring sound, A4wd to 4hi I get a quicker and louder whirring sound, 4hi to 4lo I get no sounds. (The mode lights turn on and off normally as I change mode.) I do NOT hear the "cluck" sound some people say I should hear.
Possible causes: I jumped someones car and a couple weeks later (I am guessing) my battery went dead. I replaced the battery in my car and a few days later (could have happened earlier I'm not sure) all works fine except the 4wd.
I'm thinking I need to do one of the following. Which do you think I should do? Is there an inexpensive way to do it? Are there any other tests I can perform to narrow this down?:
a) replace the Transfer Case Shift motor.
b) flash/reprogram the 4wd system
c) replace the encoder motor.
d) replace connectors and wires between various 4wd systems.
... or if you have another idea for my next step please feel free to mention it.
I am a DIY'er, mechanically minded, I know a little about cars, but I'm not a true car guys.
Thanks!
ps - just came over from trailvoy.com as suggested.