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Originally Posted by Turtleboy
I picked up a transistor and a pack of resistors. Could you help me out on which wires go to what? I picked up the TIP42 PNP transistor. It says viewed with heat sink down, is that the side where you can see the metal tab or the bulkier black side that the wires come out from? And now that is squared away and I know which pins are 1, 2 and 3, where does pin 1, 2 and 3 get wired into? Thanks!
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The metal part is the heatsink. Don't touch it to ground.
There should be a diagram on the back of the transistor package as to which terminal is which. The 3 terminals on a transistor are named: Base, Collector, and Emitter.
Base goes to the blue dome light wire.
Collector goes to +12v.
Emitter goes to the map light terminal.
Refer to the diagram I posted on page 1.
And don't forget to put the resistor inline on the wire from the dome light.
