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66-96 Ford Broncos - Early & Full Size
Jeff Ogden

trailer light wiring

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Should my 88 Eddie Bauer have a extra plugs for the trailer lights since it came with a hitch,the 87 f150 I had years ago that had the towing package did have extra plus for lights and trailer brakes. I removed two trailer light connectors plus wires run up to the brake light switch so who knows what previous owners had done.

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yo,

It may have had it if equipped w/Optional (on All trim levels) Trailer Towing Package; but many have been hacked by prev owners or "mechanics" when things went south;

In your 88, Trailer Towing Package consisted of;

wiring harness, HD batty, super eng cooling, aux tranny cooler, HD flasher, handling package

see Option list that shows this info here (I believe I gave you the entire 88 Brochure Links in another thread a few months ago)

post-3816-0-93575700-1337698346_thumb.jpg

 

 

Look for a connector under bumper that has these wire colors in bold

TSB 89-14-17 Trailer Wiring Colors

Publication Date: JULY 14, 1989

 

LIGHT TRUCK: 1990 BRONCO, F-150, F-250, F-350

 

ISSUE: Trailer tow wire harness color codes have been revised to be compatible with SAE color code standards. When hooking up a vehicle to a trailer that has been wired according to the SAE standard, the wire color/circuits will match.

 

ACTION: Refer to the following Circuit Color Code Chart for the correct color/circuit usage.

 

CIRCUIT COLOR CODE CHART

CIRCUIT FUNCTION - OLD COLOR* - SAE COLOR*

Trailer LH Turn/Stop - LG/O - Y

Trailer RH Turn/Stop - O/LB - DG

Trailer Brake Lamp From Controller - R/LG - R/LG

Trailer Electric Brakes Solenoid - BL/BR - DB

Trailer Back Up - BK/PK - R/Y

Trailer Ground - W - W

Trailer Running/Tail - W/R - BR/W

Trailer Power (Battery Charge) - Y - O

Trailer Brake Control Feed - R - R

 

Color Key - Color Abbreviations

BL-Blue

BK-Black

BR-Brown

DB-Dark Blue

DG-Dark Green

LB-Light Blue

LG-Light Green

O-Orange

P-Pink

R-Red

W-White

Y-Yellow

 

 

 

1988 Ford Bronco Trailer Wiring Harness

Curt T-Connector Vehicle Wiring Harness with 4 Pole Trailer Connector

http://www.etrailer.com/t1-1988_Ford_Bronco.htm

$19.95

 

•Installs quickly and easily - simply plugs in to factory connectors

◦Does not require cutting or splicing

•Includes installation instructions

Can be used with 5-pole, 6-pole or 7-pole adapters.

 

Tech Tip: It is always a good idea to apply a small amount of ELECTRICAL grease to all electrical connections to help prevent corrosion.

 

the white wire from the Curt T-Connector Vehicle Wiring Harness # 55302 is supposed to be grounded to a clean metal surface on the body of your vehicle

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I looked today and found 3 wires togather that probably had a connector but no power from any,my 87 F150 had two extra connectors so I will look again for another to see if its shoved out of sight. I might just buy one of those wiring kits that plugs into the harness if I cant find any more wires.

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This my be an old topic but this is relevant to me atm. Prev owner of my Bco spliced in his own wires to the plugs under the rear bumper but the plugs are still good. the only thing that I can find for those plugs is this : ( _LINK_ )

 

s-l1600.jpg

 

@miesk5

 

CIRCUIT COLOR CODE CHART
CIRCUIT FUNCTION - OLD COLOR* - SAE COLOR*
Trailer LH Turn/Stop - LG/O - Y
Trailer RH Turn/Stop - O/LB - DG
Trailer Brake Lamp From Controller - R/LG - R/LG
Trailer Electric Brakes Solenoid - BL/BR - DB
Trailer Back Up - BK/PK - R/Y
Trailer Ground - W - W
Trailer Running/Tail - W/R - BR/W
Trailer Power (Battery Charge) - Y - O
Trailer Brake Control Feed - R - R

 

    If I don't buy the ebay kit can I use the color code chart to splice in my own wires?

Edited by Skitter302

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Yo Skitter,

Yes the chart is by Ford.

Here are the partial Ford Bronco, 91, trailer wiring diagrams

 

Trailer Power (Battery Charge) is O

Next diagram:

 

Trailer Running/Tail is B/W


Next diagram:

 

Trailer Back Up is  R/Y

 

See more diagrams and TSBs   @ http://www.revbase.com/BBBMotor/Wd

 

I have severe Concast lag issues so I get timed out while trying to download more.

post-3816-0-18834900-1504530578_thumb.png

post-3816-0-49382500-1504531520_thumb.png

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Thanks for the info! After doing some more looking under things I found my pigtail for the trailer brake, and my relays under the hood are good to go so I'm thinking I'll pay the Big $$$ and get the factory wiring for the 7pin plug.

 

Any tips for finding a plug for the trailer brake wires on the floor by the Brake?

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Yo,

YW!

See https://www.etrailer.com/p-ETBC7.html

If this isn't what you need, call them. 

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

Item # ETBC7

etrailer.gif

Retail:$86.43

Our Price: $60.90

 

If your vehicle already has a 4-way flat, this kit includes everything you need to install an electric trailer brake controller and 7-way connector. If there's not an existing 4-way flat on your vehicle, you can purchase one separately.


Features:

  • Kit includes wiring and accessories required for installation of a trailer brake controller (sold separately) in your vehicle
    • Designed for use on a vehicle with an existing 4-way flat trailer connector
  • 25' Long, 10-gauge duplex wire is wrapped in an abrasion-resistant cover
    • Connect one wire to the blue wire on the brake controller
    • Connect one wire to the positive post on the vehicle's battery via the included 40-amp circuit breaker
  • Pre-wired 7- and 4-way trailer connector mounts easily at rear of vehicle with included bracket
    • Plugs into existing 4-way trailer connector on vehicle
  • Heavy-duty circuit breakers - (1) 20 amp, (1) 30 amp, and (1) 40 amp
  • Circuit tester helps you find the stoplight switch wire above the brake pedal
  • Also includes hardware for installation:
    • Ring terminals for battery and breaker hookup
    • Quick-splice wiring connectors
    • Self-tapping screws
    • Zip-ties
    • Wire loom for a professionally installed appearance


Note:

  • No existing 4-pole connector: If your vehicle does not already have a 4-pole flat trailer connector installed, the etrailer.com application guide can be used to find the easy-to-install connector made specifically for your vehicle.
  • Extra-long vehicles: If you drive a crew cab, extended cab with long bed, cargo van, minivan, or extended-length SUV, 10' of extra wire (ETBCXW - sold separately) will make installation much easier.

7-Way and 4-Way Trailer Connector

Wiring Diagram for Trailer Brake Controller InstallationSee it at the site because our site's programming issues error message You are not allowed to use that image extension on this community.

ETBC7 Universal Installation Kit for Electric Trailer Brake Control - 7-Way Blade and 4-Pole Flat - 10 Gauge Wires
Installation Details 

Related Products... see site.

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According to Ford, the part I need is FOTZ-13A576-A any idea if the Plugs on F6TZ-13A576-BA are the same?

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Yo,

I can't find a plug diagram of FOTZ-13A576-A  that is shown as available @ 

http://www.boballenford.com 

Call and ask if they can compare to

F6TZ-13A576-BA

  • 7 Pin Trailer Towing Connector Wiring Harness
  • Bronco F-150 F-250 F-350 F Super Duty
  • 1994 1995 1996 1997

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I did, they can't.

 

I will be buying some wire to extend the existing wiring and attach that to a 7pin connector. That will allow me to use as much of the factory wiring as possible.

 

thanks for the Help!

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Yo,

YW!

Thats a good alternative!

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