Wiring SPDT Relay with Two Sources

I actually worked for Radio Shack for several years, and although we carried diodes, relays, and switches, I never knew anything about them. After the info in this thread, it's easy to see how they all work together and the reasons for using them, would have been nice to know that back then. The LED reverse lights are a spot pattern, so there is a dim spot in the middle. I plan to switch them out for the same lights in a flood pattern (flood wasn't available when I ordered). I'm in love with the LED's, the amount of light they throw is unbelievable. That's only the rear, the view from the front is even better.

arkansas_mystic wrote: I actually worked for Radio Shack for several years, and although we carried diodes, relays, and switches, I never knew anything about them. After the info in this thread, it's easy to see how they all work together and the reasons for using them, would have been nice to know that back then. The LED reverse lights are a spot pattern, so there is a dim spot in the middle. I plan to switch them out for the same lights in a flood pattern (flood wasn't available when I ordered). I'm in love with the LED's, the amount of light they throw is unbelievable. That's only the rear, the view from the front is even better.

Not sure why that pic didn't work. As a noob, I can't edit my post so I'll try again. It's a 30" double row LED bar on the front.