Originally Posted by DCNISMO

You have a constant power feed and a switched power feed that feeds into the connector. The constant power wire should always show power and 12 V when the battery is connected and the fuse is in place and good. The switched power should show 12 volts when you turn the key to the on position. Put a meter on the connectors and check it. I think the constant power wire is yellow and the switched is orange. My constant power wire got shorted someplace inside the wiring loom when I did my install, fuse was good, but no power. Drove me nutty till i fixed it by finding another constant 12V tap on the fuse box.