The trucks that came with that wiring from the factory used some relays a splicing up front. The AAW kits dont have provisions for trailer wiring. Do I need the old style 'trailer brake control' module in the cab wiring? Sorry for my inept confusion!īut thanks for your patience!Yeah, sounds like you're in over your head a little. I like the 7- and 4-Pole Trailer Connector Socket w/ Mounting Bracket - Vehicle EndItem # HM40975,Īs that is what I want to have in the end product! But the actual connections to my '78 F250 wiring system is unclear to me. Okay gentlepersons, but how do I go about wiring it into my '78 F250 wiring harness? That looks like you would have a 7 blade already on the truck and plug this into it to have both a 4 flat pin & 7 blade at the rear at the same time?ĭave -The TEE harness to the 7 blade socket and the adapter from 7 blade to flat 4 To tell the truth I have never used the adapter but maybe my son has only last year when he used the truck to pull a Uhaul trailer. Now if I have the need to pull a flat 4 pin trailer I have adapter to go from the trucks 7 blade to flat 4 I keep behind the seat storage.īTW my 02 Durango has the factory tow package and only had the 7 blade connector out back but the factory also gave a 7 blade to flat 4 adapter in the glove box. I also ran 10 ga wire for trailer brakes & 12 volt power into the connector socket with fuses. I cut the flat 4 pin off and wired this into the 7 blade connector socket. On my 81 I use a trailer wiring harness Tee that fits between the frame rail harness and tail light harness. looks like you would have a 7 blade already on the truck and plug this into it to have both a 4 flat pin & 7 blade at the rear at the same time? Just buy one of these with both options in the same housing and wire it up. I was only hauling a couple of hundred pounds in addition to the trailer itself, so risked foregoing the need for trailer brakes but it obviously got me to thinking ahead to when I wire my F250!Īny experience/expertise/advice is appreciated, as I obviously know enough to be 'dangerous' about this stuff. So I improvised & bought a wiring connection kit with the 7 pin female side & a 4 pin plug on the other end with a couple of other wires which I suspect were for the trailer brakes which I did not use. Will I have to make my own adapter to house both connectors at the bumper? Is it possible to wire it for both, & what will I need to know/do? Obviously I am in way over my head with this idea which came to me last weekend when I borrowed a friend's trailer with it's 7 pin round connector & my vehicle only had a 4 pin straight connection. I have a new wiring system/set from American AutoWire. Please note that the tool that you receive after placing an online order may be in a used but operable condition due to the nature of the Loan-A-Tool® program.I want to wire my '78 F250 Ranger XLT for a 7 pin trailer connection, as well as a 4 pin straight connection if I can figure out how to do so. Do not wear ties or loose clothing when working on your vehicle.įREE Loan-A-Tool® program requires returnable deposit. Should electrolyte get on your body or clothing, neutralize it immediately with a solution of baking soda and water. Always wear gloves and safety glasses and other personal protection equipment, and work in a well-ventilated area. Sulfuric acid is caustic and can burn clothing and skin or cause blindness. Use caution when working with automotive batteries. Always disconnect the negative battery cable before servicing an electrical application on the vehicle to protect its electrical circuits in the event that a wire is accidentally pierced or grounded. Always chock your wheels prior to lifting a vehicle. Refer to the service manual for specific diagnostic, repair and tool information for your particular vehicle. Information is accurate and true to the best of AutoZone’s knowledge, however, there may be omissions, errors or mistakes.īe sure to consult your owner’s manual, a repair guide, an AutoZoner at a store near you, or a licensed, professional mechanic for vehicle-specific repair information. Advice, how-to guides, and car care information featured on and AutoZone Advice & How-To’s are presented as helpful resources for general maintenance and automotive repairs from a general perspective only and should be used at your own risk.
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