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Originally Posted by ree
Can't you wire it to a circuit that's on when the key is in the run position, put the key in and turn it to run, but don't start the engine? Yes you have to put the key in, but you don't have to start the truck.
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Yes, that is the way you wire them. Wiring them to constant 12V POS makes no sense for practical purposes.
Aftermarket light manufacturers even vary on their wiring diagrams. Some are through a switched source and some just say 12V POS.
The grill lights that came on the H2 were wired hot all the time and when I put the PIAAs up there, I rewired the switch to be on a switched circuit. It's just a matter of common sense. I don't need the lights to be able to burn without the key on and more importantly the engine running (since now I have 8 - 85 watt and 4 - 55 watt lights).
But, H3.007, why don't you think the same thing can occur with the key ON. I've melted covers before. It get's gooey, makes a mess, cools down, hardens and then is a pain. It doesn't catch fire, it doesn't kill little children or blow up houses or even cause heart attacks. The true hazard is to your ego for being the idiot that hit the switch and melted your covers. Get over it, you are certainly not the first and most certainly won't be the last.