i had my grizzly 700 up at my work two days ago and we were trying to fix a starting problem, and on the third try everything went blank. the headlights, tail lights, display, nothing will come on. checked my battery, i got a good charge, the key switch works, the fuses are all good, including the main fuse. anyone have any ideas what this could be? i'm thinkin ECU, but don't really want to spend 400$ on a part i'm pretty much just shotgunning. if it is the ECU, can i buy the VDI copperhead ECU or do i still need a stock one to run that?

 

Just a "WAG."
You have battery cable issues.

The ECU is going to have nothing to do with the lights. Your not gettng power to the main harness for some reason.

 

ditto on the battery cable issues..

Make sure those cables are tight and clean! If you have any corrosion on the cables, that could very well be a problem. I use dielectric grease on all my electrical fittings, especially the battery cables. Get yourself some..

 

my battery cable's are clean as can be, i've already checked my battery's charge, the ground, and the voltage going from the battery to the key switch and starter relay. i'm thinking it's something in my left handle bar switch assy. it houses my headlight switch, ignition switch and all of that. anyone know how to check it?