I've been getting a bit frustrated lately because the fan on my '05 Brute 650 SRA only works when it wants to. Last week I took apart all the connections, cleaned em up and put dielectric grease on em all. I let the Brute idle for a while and the fan kicked on and I was happy. Just today I was pulling some downed trees across the yard and the fan was running fine. Well, just when the work was all done I went out to play and the Brute started over heating and spurting fluid out from somewhere under the left fender. I noticed the fan wasn't running at all. What's up with this? The rest of the day the fan would turn on for about 2 seconds and turn off right away. The Brute over heated again and this time it died and did not start. I was not in any water today and I have no clue what is going on.

Any ideas? Thanks.

 

Have you checked the fan switch yet? It is normally open and it closes to turn ON the fan when the coolant temperature reaches around 205~212 F (when heating up). Then it should open to turn OFF the fand around 195 F (when cooling down). If the switch is fine, they your fan motor has an intermittent problem. This is assuming you don't have a connection problem any where else on the harness.
Good Luck.

 

I found this in other forums I'm subscribed to, it says about the 750 but same goes for the 650.

Some of you including me have had electrical problems with their brutes. I read this post, cleaned the bus bar and my problems are gone. Hopefully this helps for anyone with electrical problems.

Saw this at HL and thought I'd pass it on...courtesy mudcrazee.
I just got back from the dealership, and the service department gave me a copy of this, so I am posting it to help everyone out. It deals with the fan, overheat issues and other problems I have seen people post about.

K-TECH NEWS Vol #18 Issue 1 2005
KVF750 Connector Corrosion Creates Electrical Havoc

Do you have a KVF750 exhibiting strange electrical problems? There have been reports of some very strange electrical symptoms that can be difficult to diagnose.
Typical symptoms are listed below in the order from most common to the least common:

1. Fan does not activate and the engine overheats
2. Meter stays on and the battery goes dead
3. Fuse keeps blowing
4. Engine stalls when 4wd is engaged and does not restart, but it restarts in 2wd.
5. Engine starts without ignition key (when just green button is pressed).
6. Check belt light is flashing.

The cause for these symptoms can be often traced to corrosion forming inside one of the two white plastic 1"x1-1/4"x3/8" joint (BUS) connectors that are taped to the main wiring harness. There is one under the front fender between the front shock towers and another one under the rear fender near the fuel tank.
So far the problem has ocurred only on the rear connector. More specifically, the rear connector/harness is attached to the tube frame just to the right side of igniter/control unit area. If you pry open the cap of the connector, you may find greenish corrosion (electrolysis) formed inside between the bare metal contacts. The electrolysis occurs within the connector because there are positive and negative wire terminals joined together without any barrier to seperate them. On the rear connector the white wires are always on (+), the brown wires are ignition on (+) and the black/yellow wires are ground (-).
If your customers ride in deep water or somehow cause water intrusion into this connector, a special prevention is required because the problem could repeat. After cleaning up the corrosion or the main harness is replaced (because the connector itself is not available seperate), some dialectric grease should be applied inside the connecter and it should be well sealed to prevent further moisture intrusion. The ultimate repair is to remove all of the black/yellow ground wires, solder them together and seal them seperately from the connector.

 

Guys thanks. I'll give all that a shot and let ya know the outcome.

 

BTW, Live2Quad welcome to the forums!

 

Thanks I hope to get pics tmr when I go riding/after i wash my quad for pics to sell it for a 450r honda[img]i/expressions/face-icon-small-happy.gif[/img]