How would I wire the 2 ramp flashers on MET Pro to 1 under cab lighting wire? I don't want to just splice the wire, send some current where it shouldn't go, and screw something up. I want the red under cab lights to flash when I hit each ramp. Right now I have just 1 ramp flasher connected. Do I need to put a diode somewhere if I splice the under cab wire and send a connection to each flasher? Thanks for any help on this.