John, I did some voltage readings on the wire the runs to the alternator with the incandescent and the LED. Incandescent: around 12v LED: Around 8v Definitely a reduction, not enough to charge the system. When the Led light was installed it is on but very Dim. I talked to our vehicle Electrician and Engineer at work about it. I showed them Jamstraits Resistor and asked if this might solve the problem. They didn't really have an answer but said, give it a try. I went ahead and ordered one to try it out. What do you think, would this solve the problem? http://www.jamstrait.com/loadr.jpg Regards, Mike