Hey John T.-truck tail lights

redtom · May 10, 2020

Care to provide any insight into my "truck tailight mayday" post from a couple days ago? Mot just because you're an experienced electrician but I know you have a lot of RV experience. Thanks

used red MN · May 10, 2020

In the link is what he is talking about, he has quite conundrum. My long distance side line opinion is that he does not have the proper unit for the conversion he is doing.
Post in question

John T · May 10, 2020

I missed out on that thread, but having ran RV's for years along with using later model 4 wire trucks to pull the older 3 wire trailers etc I HAVE USED 3 TO 4 AND 4 TO 3 SOLID STATE BLACK BOX ADAPTERS AND THEY ALL WORKED.... Get this I have used my 3 wire RV to tow a 4 wire car and on the back of it I towed a 3 wire golf cart trailer AND THEY ALL WORKED..

From 3 wire RV to the 4 wire Pontiac I used a 3 to 4 adapter and then out the back of the Pontiac I used a 4 to 3. YOU HAVE TO GET THE RIGHT ADAPTER DIRECTION like FROM my RV 3 TO THE 4 wire Pontiac and on back of it a 4 to 3 for the trailer...

THEY WONT WORK IN REVERSE On my triple tow in the picture I of course had to use BOTH 3 to 4 then 4 to 3

One things I learned THE GROUNDS HAVE TO BE PERFECT+++++++++++++

I don't know what else to tell you other then you need EXCELLENT GROUNDS RV to car and Car to trailer and they don't work in reverse.

Soooooooo what exactly was your question and what is it thats not working ????

John T

redtom · May 10, 2020

I have a lot of data in my original post but to condense it: 5 wire truck to 4 wire trailer through converter. After much struggle, Everything works on trailer wire except brake lights.

Janicholson · May 10, 2020

The last info I had was that there was too much current draw for the converters. I suggested LED tail lamp repalcement. Jim

Pete in Holland MI · May 10, 2020

I didn't think you could do a double ball hitch pull like that. A 5th wheel with a ball hitch set up was acceptable.

John T · May 11, 2020

Sorry Tom, I have no idea why yours doesn't work??? All I can say is I used a black box adapter several times to tow an old style trailer using a modern vehicle and they all worked ???? The only things I see are maybe Jim's advice of converting to LED and/or a bad ground??

John T

John T · May 11, 2020

I think its illegal in several states. I towed from Indiana to Florida several years that way and got passed by cops in all states never had a problem. BUT I STOPPED DOING IT AND NEVER WILL AGAIN its just not as safe as I prefer and sooooooooooooo hard to pull in and get out of a gas station lol

John T

Duster1147 · May 11, 2020

John T you are correct, you can tow doubles only if first unit is a fifth wheel hitch, then second unit can be draw bar hitch.

Hey John T.-truck tail lights

redtom

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used red MN

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John T

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redtom

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