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4WD not working. Need help!

5.9K views 3 replies 4 participants last post by  oleblue22  
#1 ·
Hey there,

New member and in need of help! I've had my 2004 grizzly 450 for a while now and it has been great until last fall when I was crossing a creek and hit a big boulder which turned me onto my side. The quad took on lots of water. After several oil changes I got her up and running like a top again. However I put the quad away for the winter and did not notice until recently that the 4wd was not engaging.

I have since tested all 3 relays and checked all fuses, which all test fine. However they are not getting power when pushing the 4wd button. I bought a new switch and installed it but still nothing. The relays are not clicking or showing anything on the multimeter. The diff lock does show its icon on the display when i push the button for it, and it flashes, but no 4wd. I've followed the wiring and can't seem to find any shorts or melted wires.

Any ideas? I'm racking my brain and looking all over the internet but I'm stumped. Any help would be much appreciated.

Thanks
 
#2 · (Edited)
Welcome to the forum. Seek out member oleblue22 or visit 501parts.com. He is a site sponsor and has helped several members with 4wheel drive issues. He has several YouTube vids for diagnosing 4x4 issues as well.
 
#3 ·
If the relays test good and the diff lock light is flashing I would check the servo I had a similar problem on mine last month luckily extended warranty covered it the servo motor was bad but as said above look up oleblue22 the motors are cheap and easily replaced.
 
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#4 ·
RustuRipper, I got your PM and responded back. Run those checks and see what you come up with. You mentioned in your PM you didn't test the servo yet. After reading your post here, I would definitely go ahead and do that and see what you find. Here is a video on testing it. Yours is the 5KM. Let me know if I can help you further.