jjrbus Posted July 28, 2016 Share Posted July 28, 2016 I am working on my generator box and want to add taillights to it. I purchased a set of LED lights online and of course have an issue. The first thing I find out is they do not have a DOT # on them and will not pass an inspection, we don't have inspections in Florida so should be OK there.. I started out and nothing would work, turns out the ground wire had been broken at the frame, I would expect no less, at least the rest of the wires work. These are LED and this is how I wired them. The running lights and left and right turn signals work but not the brake lights and yes the brake lights on the Toy are coming on. These lights have 5 wires Blk is Gnd Green is running light Red is stop White is back up and Yellow is turn. I am 99% sure on this. I have a four prong flat connector and am not concerned about using the back up lights and believe that I cannot use the yellow tun lights with a 4 prong plug. I am hoping I have done something wrong and it is not an LED issue. Any suggestions greatly appreciated. Jim Left click on photo to enlarge. Quote Link to comment Share on other sites More sharing options...
WME Posted July 28, 2016 Share Posted July 28, 2016 INFO https://en.wikipedia.org/wiki/Trailer_connectors_in_North_America Quote Link to comment Share on other sites More sharing options...
jjrbus Posted July 28, 2016 Author Share Posted July 28, 2016 1st addendum to original post, I tried these lights hooked up the way they are on my 2008 Ford Ranger with a 4 prong plug and the brake lights work? Jim Quote Link to comment Share on other sites More sharing options...
Back East Don Posted July 28, 2016 Share Posted July 28, 2016 41 minutes ago, jjrbus said: I tried these lights hooked up the way they are on my 2008 Ford Ranger with a 4 prong plug and the brake lights work? So you know it's not the lights. Got a test light? Use a stick to hold the brake pedal down and use the test light connected to the plug ground to see if the plug is getting brake light voltage. Quote Link to comment Share on other sites More sharing options...
Back East Don Posted July 28, 2016 Share Posted July 28, 2016 (edited) A quick thought. Does the Ford have an electronic trailer interface/controller for the plug? Note: I've got another meeting this afternoon and will be dutifully ignoring you. Be back later and I'll check in. Edited July 28, 2016 by Back East Don Quote Link to comment Share on other sites More sharing options...
jjrbus Posted July 28, 2016 Author Share Posted July 28, 2016 (edited) I asked Bubba about the interface/controller and he said "Say What?" Then I asked Google and got 2 million hits, it looks like a factory install. I checked voltage and there is not brake light voltage going to the plug. Jim Edited July 28, 2016 by jjrbus Quote Link to comment Share on other sites More sharing options...
Back East Don Posted July 28, 2016 Share Posted July 28, 2016 Meaning a factory installed interface. You'll either need a interface or you'll need to change from a 4 pin plug to 5, adding the brake wire. Right now you have ground, left, right and running lights. That is your 4 wire connections that combines turn and braking lamps Quote Link to comment Share on other sites More sharing options...
jjrbus Posted July 28, 2016 Author Share Posted July 28, 2016 Thanks Don, let me chew on that for a bit. Going to a 5 pin should be fast and cheap, no more than 3 weeks and one trip to the emergency room so let's say $2000. So to go to 5 pin I would need 4 wires going to each light? I looked at the schematic that National supplied and it is not color coded only states they added a 48" harness. Jim Quote Link to comment Share on other sites More sharing options...
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