2005 750 brute force the 4x4 does not work have checked switch and wiring i have read if actuator goes bad 2wheel drive and 4wheel drive light will flash i unplugged the actuator and the 2and 4wheel ligt flashed plugged it back and it stopped so i hope its not the actuator any ideas will be appreciated thanks

 

If 2/4WD light is NOT flashing and no 4x4, then any of following could be the cause:
1). Igniter.
2). 2/4WD rocker switch
3). Speedo sensor
This is assuming there is no other hard "mechanical" failure - such as broken front diff gears or anything.

 

hey thanks for the info the igniter is smoked what could have caused it to burn up i was wondering cause its over 300.00 dont want to smoke another one anyway thanks again i will probably need help again

 

When you say the igniter is smoked, do you mean that just the 4WD function is not working or other function as well? If only the 4WD is not working, then the 12 VDC output from transistor circuit to the Control unit is smoked. And that's why 4wd is not engaging because Control is not getting 12 VDC from the igniter. If you have aftermarket Ignition Control Module (ICM) that spliced into the existing wiring harness, that's the cause. But, sometimes, that transistor in the igniter just smokes without any aftermarekt ICM. I suspect that's due to fluctuation in voltage signal from the speedo sensor located at the right side of quad, just below/behind foot brake pedal. That is the pink wire (speedo sensor voltage) connecting to the igniter. I would install an in-line voltage suppressor (also called noise filter) as a prevention - get one for $10 from Radio Shack.

 

the igniter smells like its burnt and the bike wont run i will check on the filter at radio shack thanks

 

Since the bike is not running, it seems like the main cirucitry of the igniter smoked. You may want to inspect if the 12VDC to the igniter is a properly fused supply voltage. Make sure no one installed higher than rated fuses in the fuse box. Then, install the noise filter (voltage spike suppressor) splice into the main 12 VDC supply line into the igniter (not the output).

 

my 4x4 is also out but also braking system is not working i do not here it engaging and disengaging

 

i think the 4x4 and speedometer sensor and engine brake system is tied together hyaoshi helped me alot and is the person to ask shoot him a line good luck

 

750 brute force no 4x4 ,just bought it .the 4x4 was bypassed at the red and black wire to the front diff,and the 4x4 worked by a toggle switch,i replace the ecu box and no for wheel drive.tried a used control box and still nothing.the 4x4 switch works any ideas