StephenR, the switches in the NW tech. kit are wired single pole Normally open. There are resistors wired between the normally open connector and what would be the normally closed connector (this is to insure the life of the LEDs in the switches) When wired operating point to +12v, there does not need to be a load on the normally open connector for the led to light). The only way to use the switch to break a circuit would be to wire it to a relay single pole or double pole DOUBLE THROW 12v relay. Bosch does make these. The circuit would have to be run thru the normally closed contacts on the relay. That way when you switch on the switch it makes the relay and breaks the circuit that you want to disable. I have all 5 of the operating points of the switches wired to 1 key on source. (an in line fuse for each of the 5 wires). I am using a relay to break the grounds for all 7 of my interior neons so that they can be controlled with 1 switch. I have not found the PT electeical system to be particularly sensitive to splices. I have some soldered connections, some in line splices as well. As long as care is taken to note the gauge wire that you're splicing into, and use the proper in line connectors for that gauge wire it works well. Just 1 caveat, if you are going to use these connectors anywhere outside the car, be sure to use the in line splices with sealer inside. 3M makes them. They seal after the splice is squeezed closed.
Alan
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