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Old 08-25-2009, 09:17 PM
Senior Member
Join Date: Dec 2006
Location: dallas, TEXAS
Vehicle: 2006 Ford F-150
Posts: 848
what do i need to know to install a 7 pin wiring harness?

hey i just bought a new 6x12 trailer and it came with a 7 pin harness and i only have a 4 pin. i realize i can get an adapter but i want to utilize the brakes so i am planning on installing the new wiring tonight if i can get some help from you guys. other than running the wire to the rear of the truck what else to i need to know? where should i plug it in to? thanks for all the help i appreciate it
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Old 08-25-2009, 09:45 PM
Senior Member
Join Date: Jul 2008
Location: San Diego CA
Vehicle: 2007 Ford F150
Posts: 640
you can get the 4 pin 7 pin plug combo from ford the single 4 pin unplugs from a harness located under the truck if i recall in two places and is grounded above the spare tire

the plugs should be located on the left side of the frame rail located near the spare tire
if you pick one up from Ford there will be directions with on how to install it

hope this helps u out some

i would go out and takes pics but my truck is a the dealership right now

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Old 08-25-2009, 10:32 PM
Technical Article Contributor
Join Date: Sep 2006
Location: Hattiesburg, MS
Vehicle: 2008 Ford F150
Posts: 889
u need this part number if you dont have reverse sensors: 8L3Z-15A416-A
change the "A" to a "B" if you have the reverse sensors.

then you will need this for the bracket to hold the connector since ford doesnt make one: http://store.uhaul.com/Wiring__light...lat_Connectors

it will give you an extra connector, but u will need the bracket unless you can make one yourself.

hope this helps!!!
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Old 08-26-2009, 12:54 AM
Senior Member
Join Date: Dec 2006
Location: dallas, TEXAS
Vehicle: 2006 Ford F-150
Posts: 848
thanks guys for the help! got a 7 pin connector that plugged into my 4 pin and just had to wire up my other 3 cables into the wires that ford provided. and i just used the bracket that was provided with the harness

2006 f-150
Fabtech 6 inch with front coil-overs + 2.5 AS, fabtech dual steering stabilizers, 20x10 951, 38x13.50r20 Toyo MT's, Banks Monster Exhaust and K&N intake
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Old 08-26-2009, 12:54 AM


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