Introduction A programmable controller is potentially very complicated. 4QD have considered in depth how to give the user access to the full programmability, but without making it confusing to the novice. At the same time Read More

When you apply a battery direct to a motor, without a controller, there is a large surge as the motor gets up to speed and the vehicle is subject to rapid acceleration. When a motor Read More

These notes apply to the inhibit function of the 4QD series controllers. If a vehicle is fitted with a hand or foot brake, it can be useful to disable the controller. This can be done Read More

Electronic Ignition When the controller is not in use it needs to be deactivated. The electronic ignition circuitry (fitted to all controllers) does this, so the controller draws no current and the throttle input will Read More