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4WD NOT WORKING

74K views 26 replies 17 participants last post by  gherbert 
#1 ·
4wd isn't working,I don't have any lights lit up and it's in 2wd,I'm thinking the problem is the module that tells the motor to change to and fro,but I thought I'd check to see what you guys thought first.thanks guys
 
#3 ·
That could be the problem. Have you put a meter on it to see if it's getting juice? If not, or you haven't checked it yet, check your fuses. That's the quickest to rule out.
 
#7 ·
Often its the simple things that work....

I know that whenever I have difficulty activating or deactivating 4wd I find I am not doing it correctly due to it not being an often enough occurrence for me. Hate to suggest it but perhaps your missing something too?
 
#8 ·
are you switching into 4lo or 4hi?

how long have you not been able to switch from one to the other?

i had this problem when i was about to go mudding once, when i gave up on pushing the buttons i backed out of the entrance to the field. for ***** and giggles i tryed to engage 4lo in N while rolling and it worked. Im thinking that when i put it in reverse it fixed the problem.

also 4hi wont engage unless you are rolling, from my experience.

hope this helps
 
#9 ·
I can't switch into anything cause the lights that tell you what gears the transfer case is in are not lit. When it went out about two weeks ago I was switching from two whl to four whl hi,and the light was blinking for a while ,then it just went out ,but when you turn on the ing.switch they all come on like they should then they all go out and it is in two whl drive. Still think its the module but I won't be able to get one til after X-mas,so til then I'm gonna try to check it w/ a meter to make sure,or go to the chevy garage and see what info I can get from them .
 
#10 ·
look under your truck at the front transfer case and see if the little electronic plastic thing that engages 4wd is connected properly. I had a problem that wouldnt let me switch gears and quickly found out that that part was busted.
 
#12 ·
My 4hi just went out on me about two weeks ago. I pusshed the button for 4hi and the light flashed and then stayed solid. I figured i was in 4hi, but when i hit the gas the back end flung around. I am able to switch into 4lo from 2hi without any problem. The 4x4 actuator is working when i hit the 4hi button and the front axle fuse is not blown.

Any ideas about what could be worng?
 
#13 ·
i have a 2005 colorado, i went thru some flood water, and now my 4wd wont work, and when i push the 2hi the motor just spins and doesnt do anything no lights lite up or anything and when i drive down the road, the transfer case trys to engage by its self?? what do i do to fix this. transfer case module never got wet just the transfer case. this was three weeks ago and its still not working everything is dry now..
 
#14 ·
I have a 2005 GMC Canyon 3.5L I5 4wd. Had the motor rebuilt which took almost a month but I got it back and everything is great except the 4wd is not working now... worked great before... "service 4wd" is displayed & my indicator lights for 2wd, 4wd hi/lo, Neutral are not lit up whatsoever... i traced all the connectors underneath and everything appears to be plugged in... actuator, transfer case, etc. The truck sat for 5 weeks... any help would be greatly appreciated!
 
#16 ·
4wd issues. 2005 Colorado No lights on transfer case control switch . even LED's were not coming on to back light the buttons. Replaced the switch with one from a junk yard back lights work but no indicator light as to what mode 2wd or 4wd the truck is in. Fuse is good, checked for voltage at plug of actuator and had voltage. Replaced the actuator with a new one and things worked ok and everything was lit and shifted from 2wd to 4wd no problem. A few days later and now no lights again and nothing shifts or is indicated . Any suggestions? Fuse is good.
 
#18 ·
Hello, I got a 06 colorado. I just replaced the rear main seal on the truck. The 4wd was working properly before i did the repairs. Now I get a service 4wd light on the cluster and no lights on the button. Anyone know what i need to do to get it working again?
 
#22 ·
Hello i have a 05 colorado z71 4 door my 4*4 went out while I was in for high going down the road hasn't come on since says service four-wheel drive. lights come on on four-wheel drive switch for about 10 seconds when I first started and go out have put new tccm transfer case motor front actuator 2-4 sensor and fix the grounds on both front fenders and nothing anyone else have this problem
 
#25 ·
so you have brought up 2 old threads and posted aboout your 4wd not working, should have started a new thread in the first place., I posted on the other thread you posted on, other then thaat go to www.355nation.net and ask them instead of throwing parts at your truck.
 
#27 ·
Last Post Before Today Was #25 · Feb 18, 2021
Only 1 of the Previos 15 Members still Active/Here
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