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03-03-2015, 11:29 PM
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#1 |
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Registered User
Join Date: Apr 2014
Location: Birmingham, AL
Posts: 560
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4 pin trailer harness
Ok, tomorrow morning I need to be on the road to pickup a 30 ft trailer. I won't have time to purchase the plug-and-play trailer harness. Can someone please help me with which wires should be spliced into the tail harness? Again, no time to get the plug and play. Your help will be appreciated. Thanks
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03-04-2015, 12:22 AM
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#2 |
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Senior Member
 
Join Date: May 2010
Location: Wisconsin & Arizona
Posts: 4,852
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Re: 4 pin trailer harness
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03-04-2015, 01:11 AM
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#3 |
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Senior Member
Join Date: Feb 2010
Location: Falls City, Nebraska "100 Miles From Nowhere"
Posts: 2,219
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Re: 4 pin trailer harness
From the left frame rail... http://en.wikipedia.org/wiki/Trailer.../North_America
__________________
Michael of the clan Hill, "Two Seventy Two's" 71 1-ton Dually 350 4-Speed 71 C/50 Grain Truck, 350 Split-Axle 4-Speed 02 3/4 ton Express 14 Indian Chief Vintage 1952 Ford 8N, "Only Ford Allowed On The Property"  "Be American, Buy American" 
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03-04-2015, 01:16 AM
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#4 |
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Senior Member
Join Date: May 2010
Location: Wisconsin & Arizona
Posts: 4,852
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Re: 4 pin trailer harness
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03-04-2015, 01:04 AM
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#5 |
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Registered User
Join Date: Apr 2014
Location: Birmingham, AL
Posts: 560
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Re: 4 pin trailer harness
Yes, so our tail harness is basically the same colors as the 4 pin flat connector?
Our tail light vs 4 pin Right turn: Dark Green - Green Left turn: Yellow - Yellow Tail (park light): Brown - Brown Ground: white |
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03-04-2015, 03:00 AM
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#6 |
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Old member
Join Date: Jan 2002
Location: Liberty, & Garden City S.C. , U.S.
Posts: 19,945
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Re: 4 pin trailer harness
The easiest way I have found is disconnect the plug right after the rear end. Stick the test light on each wire and have some one work each one. Write them down as you go. Takes 15 minutes maybe. Color codes don't mean a whole lot on a 40 year old truck that you have no idea what has been done to it.
Make sure the trailer wires match the truck and that the trailer grounds good to the truck. 
__________________
1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs. |
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03-04-2015, 09:50 PM
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#7 |
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Registered User
Join Date: Apr 2014
Location: Birmingham, AL
Posts: 560
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Re: 4 pin trailer harness
Good idea, did that and got it hooked up. Thanks all.
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03-04-2015, 10:18 PM
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#8 |
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Registered User
Join Date: Jun 2010
Location: San Diego Co.
Posts: 1,179
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Re: 4 pin trailer harness
sub'd!
__________________
1972 Chevy C-10, SWB, Fleet, 350/350, PS, PB, HEI, mostly stock, Survivor.
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