It's impossible with the switch that I have. It's an open or closed switch. When it's closed there's a parallel path through the bulb to ground (the bulb only lights when the switch is closed). I have to supply a ground to the DRL module, not a +12V like you would usually to a lamp. So basically I'm putting GND to the positive terminal and the lamp is actually the DRL module. I left the ground terminal disconnected on the switch because there is no use for it.stuofsci02 said:Just take 12 Volts from somewhere else. Your switch likely has another set of terminals on the back..
The DRL module can take an open circuit signal. The schematic shows it as open circuit when the parking brake is released...besides that's the way mine is wired and it works. So there's no need for a double pole, double throw (dpdt) switch...a single pole, double throw (spdt) switch will suffice.