Dune buggy stopped working - Razor Dirt Quad Bike

You need a wire that receives 12v+ when the key is turned on to the coil+. Apparently the wire that you have hooked to the coil is bad or not the same one that runs to the ignition switch.

Fuse blown I wonder .....
If it had, look for the issue.

check to see if both wheels are spinning in reverse, if not one of the motors is bad or disconnected and this will affect the forward gears

I have the same issue with mine. Batterys check out fine.. i'm starting to suspect the motor??

are you sure that the charger is putting out enough volts to charge the batteries? check the charger with a multimeter, then check the batteries with a multimeter, and viually inspect the batteries for bulging

Sounds like a fuel starvation problem. Start with the fuel filter, then have the carb rebuilt. Make sure the idle setting has not changed.

If the turn signal work that a start to say connection are good, On the brake master cylinder is the brake light switch jump that connection together and inspect to see if the brake light came on . If it does you will need the switch

You can find the instructions for this Mega Bloks set and loads of others at the Mega Bloks wiki - Blok City

If you follow the link below and then go to the bottom of the page you'll find the instructions for the Probuilder Dune Buggy

http://www.blokcity.com/wiki/index.php?title=9763_Dune_Racer

try investing in a battery charger instead of replacing the battery the dune buggy probably doesn't have an altinater to recharge the battery

generally the dune buggy was made by a volkswagen chassis and engines