Feature List

Pro-150 programmable parameters

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


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

Ignition Circuit

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