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How to Install 7 Way Trailer Wiring on a 1997 Ford F-150

Question:

THE 118242 DOESNT LOOK LIKE THE ONE UNDER MY TRUCK. I HAVE A 1997 F150 IT HAS A GRAY CONNECTOR WITH 4 WIRES AT BOTH ENDS and A BLACK CONNECTOR WITH 2 WIRES THAT ARE ORANGE and BLUE THAT ARE SEPERATE.DO I JUST SPLICE INTO THESE? ALL ADVISE IS GREATLY APPRECIATED.THANKS

asked by: Kenny


Expert Reply:

It sounds like your 1997 F-150 does not have the tow package wiring so the wiring harness # 118242 will not work on your truck.

To install a 7-Way trailer connector at the back of your truck, you will need to start with a working 4-Way connector, # 18252 , or # 118344 if you have a stepside. If you need to splice to connect the 4-Way, use a circuit tester to splice to the appropriate wires you found at the connector on the frame rail. If you have a 4-Way connector at the rear of your truck you will not need those items.

Next, test the orange wire that you found. If it has 12 volt constant power you can use this wire for your 12 volt connection to the 7-Way connector. Now check under the dash of your 1997 Ford. If you find a female brake controller connection port that matches the connector on the brake controller wiring harness, # 20260 , you can do a continuity test on the blue wire at the connector and the back of the vehicle to be sure it is the electric brake output wire. If these tests prove out, you can use the 4 Pole to 7 Pole adapter, # 37185 , and splice the wires at the rear without running additional wires to the front. We have a video showing this type of installation on a 1999 model, see link.

If the wires do not test properly or you do not have a brake controller connection port under the dash, you will need to use the brake controller installation kit, # ETBC7 , to complete the wiring for the 7-Way connector at the rear of your truck. We have detailed instructions, see link, for wiring the brake controller installation kit, and I linked a video installation that should be helpful also.

expert reply by: Bob G




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Products Referenced in This Question

T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector


T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

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47 reviews

118344

Retail: $27.86

Price:  $22.95

Product Summary:

Trailer Hitch Wiring
No Converter
Custom Fit

Product Specs:

4 Flat


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4-Pole Hardwire Kit Including Circuit Tester


4-Pole Hardwire Kit Including Circuit Tester

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59 reviews

18252

Retail: $16.61

Price:  $15.44

Product Summary:

Trailer Connectors
Vehicle End Connector
2 Wire System
6 Feet Long

Product Specs:

Plug and Lead
4 Flat


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Tow Ready Wiring Adapter for Electric Brake Controllers - Ford, Land Rover, Lincoln, Mercury


Tow Ready Wiring Adapter for Electric Brake Controllers - Ford, Land Rover, Lincoln, Mercury

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9 reviews

20260

Retail: $13.88

Price:  $12.99

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Brake Controller
Accessories

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Adapter
Brake Controller Wiring
Wired to Brake Controller


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Adapter 4-Pole to 7-Pole and 4-Pole


Adapter 4-Pole to 7-Pole and 4-Pole

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128 reviews

37185

Price:  $23.95

Product Summary:

Wiring Adapters
Multi-Function Adapter

Product Specs:

Plug and Lead
4 Flat
7 Blade
4 Flat


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Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires


Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires

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424 reviews

ETBC7

Retail: $86.73

Price:  $66.20

Product Summary:

Brake Controller
Accessories
2 - 8 Brakes
10 Gauge Wire

Product Specs:

Connector
Brake Controller Wiring
Wired to Brake Controller


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Product Page this Question was Asked From

Ford Replacement OEM Tow Package Wiring Harness, 7-Way


Ford Replacement OEM Tow Package Wiring Harness, 7-Way

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105 reviews

118242

Retail: $83.82

Price:  $63.95

Product Summary:

Trailer Hitch Wiring
No Converter
Custom Fit

Product Specs:

7 Blade
For Vehicle w Factory Tow Package


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