Hey Guys,
A friend of mine has a prairie 650, and is having 4x4 problems. When driving, it goes in and out of 4x4(all speeds). The switch has no control over anything. However, the display is accurate, when it switches in and out so I don't think it is the computer. Could this just be the 4x4 switch? Any related incidents? This does not make for a very safe or fun ride. Any suggestions?

 

Never heard of it, actuator probs are not commons to the 650.

The 4x4 controller take input from the speedometer, and the reverse/forward detecting sensor, and from the 4x4 actuator on the fron diff (detects when engaged or not). It appears to be te same controller that controls the engine brakes. You could try to detect a faulty switch or connection. I really think I would be lost trying to do that without the repair manual.

I can't scan it or I would email the page to you.

Does the speedometer work right?

Anyway, a properly functioning controller will not shift to or from 4x4 over 12mph. So, if he is shifting in or out going faster, I would tend to blame the controller, or electrical connections. I can't visualize a properly functioning actuator doing this.

The manual, although informative, sure lacks some good logic to use like "if the speedometer works, the speed sensor is ok" and "if the reverse light operates correctly, the revese sensor is operating correctly". How hard would that be? I better hit reply now before I start to whine again.

Good luck.

 

Hey nyroc,
Yes, the speedo works fine. I will forward him this info. Thanks alot, hope this helps.