NiftyX
Member
This is a setup I made to just flash the corners of a Whelen Liberty lightbar. The reason I set this up is because my lightbar is wired to a three-position pursuit switch and I didn't want to set each set of corners (front/rear) on a separate switch that activated with the pursuit switch (programmed with a CemCom). Plus, I only had one extra outlet on my CenCom.
This is a simple DIY setup using rectifier diodes available at Radio Shack. The setup allows the corner modules to activate like normal using a pursuit switch (rear of bar and whole bar). My particular setup uses position #1 to activate just the rear of the bar and position #2 activates the whole bar. I now have a button designated to activate just the corner modules.
Four 3-Amp Rectifier Diodes:
Wiring Diagram (for a Liberty):
The labels FRONT CORNERS (GREEN WIRE) and REAR CORNERS (BLUE WIRE) are the wires coming from the switch to normally activate the light. In my case, position #1 on my pursuit switch would normally activate the rear of my bar (which includes the blue wire) along with my rear strobes and deck lights.
In Real Life:
There is probably a more efficient way to set this up, like stacking the connectors and taping them together so it's not as flimsy.
Basically the rectifier diodes allow current to pass in only one direction. When the switch for the corners is activated, the diodes prevent a back feed of power, which in my case would activate other lights tired to the circuit that are activated with the pursuit switch. This also prevents power from crossing over during normal operation using the pursuit switch. I spliced this creation into the lightbar corner control wires and also to a switch on my switch panel.
This setup can easily be modified to fit numerous other applications and needs.
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