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Ford Truck Club Forum > GARAGE TALK > Garage Talk: Towing & Hauling



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  #1  
Old July 25th, 2010, 12:54 PM
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Question Trailer wiring problem

I can not get the tail lights to work on my 4 pin flat trailer wire connector on either truck. I have brake lights, left and right turn signals, but no tail lights. Anyone have a clue as to why this is?



Also, what is the color scheme (what color wire goes to what function) of an old 6 pole round trailer connector? I need to convert my 1968 Aloha travel trailer to a flat four, or 7 round RV plug, but the colors are different.


Big T



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  #2  
Old July 25th, 2010, 01:34 PM
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Quote:
Originally Posted by BigT_2000 View Post
... what is the color scheme (what color wire goes to what function) of an old 6 pole round trailer connector?
Hope this helps dude:





  #3  
Old July 25th, 2010, 01:38 PM
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Sounds like the tail light wire is blown in two or bared on the trailer?

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Old July 25th, 2010, 01:39 PM
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Quote:
Originally Posted by BigT_2000 View Post
I need to convert my 1968 Aloha travel trailer to a flat four, or 7 round RV plug, but the colors are different.
How about this:





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Old July 25th, 2010, 01:45 PM
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Quote:
Originally Posted by BigT_2000 View Post
I can not get the tail lights to work on my 4 pin flat trailer wire connector on either truck. I have brake lights, left and right turn signals, but no tail lights. Anyone have a clue as to why this is?
Check this out:

4 way flat molded connectors allow basic hookup for three lighting functions; right turn signal / stop light (green), left turn signal / stop light (yellow), tail light / license / side marker (brown) and a ground (white).

Inspect the brown wire... see if its getting any voltage. Probably the best starting point after a complete visual inspection to make sure the line is damaged.





  #6  
Old July 25th, 2010, 06:40 PM
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very nice, Nine5 ---- looks good enough for the technical artical section
I will have to commit such to the memory bank

I have several trailers and they all seem to be tempermental

ohm the trailer to check for that bad wire, if they are concealed


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Last edited by JSoko; July 25th, 2010 at 06:43 PM.
  #7  
Old July 25th, 2010, 06:56 PM
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I just reran all the wiring on my dads flatbed, it was worth it with those LED tails, Man they are bright and no mistaking when I hit the brakes.

Let me rephrase that, did that work this year, when it was much cooler outside lol

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Last edited by Klitch; July 25th, 2010 at 07:01 PM.
  #8  
Old July 26th, 2010, 01:59 AM
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the most common thing ive came across on our 4-flat plugs is the female side of each wire gets waller'd out so the contacts arent passing the voltage along with corrosion on top of that... we replaced all the lights on my dads boat trailer with led's. boat trailer lights dont last too long down in these parts

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  #9  
Old July 26th, 2010, 12:48 PM
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Usually one of the wires gets corroded in our neck of the woods T!
We run across that all the time at work.

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  #10  
Old July 26th, 2010, 01:15 PM
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Thanks guys! I appreciate all the responses on this one. Let me put a little more info out there. First, I have rewired the truck side twice. Let me restate that: I rewired it once with a new connector and had voltage on all contacts. Then I added a convertor to allow for the round 7 RV plug -or- a flat 4. Second, I completely rewired the trailer from the lights, to the hitch. Corrosion or damage is not an issue, at least not on the trailer side. Yesterday I found a flat 4 plug that is a conversion kit for vehicles with separate bulbs for tail and brake lights and converts them to the common bulb trailer system. Do our trucks have separate bulbs?


Big T



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