Question about 1999 Mercury Grand Marquis

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Want to add wiring for small trailer - 1999 Mercury Grand Marquis

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Try this site. http://www.etrailer.com/faq-wiring.aspx. They give color codes and detailed info. If you have one bulb that does both, running and stop lights, then simple wiring to colors should work. If you have two bulbs, one for brake and one for turn signal, you must use a converter. Otherwise, it feeds back to whatever you are wired to. Good luck

Posted on Dec 16, 2010

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Posted on Jan 02, 2017

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1 Answer

Where does the trailer 5 pin blue wire go to and from


The blue wire is assigned to electric trailer brakes, if fitted. On small box trailers it is therefore unused.
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Jun 19, 2016 | Cars & Trucks

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How can i hook it up? I have a 4 wire trailer wiring diagram


I am really not sure what you are asking for, but guessing you need to add a trailer 4 wire plug. The best way is to see if they make a wiring T ! Then you find the wire connector for your tail lights. This T is made to fit between your wire connection! Easiest and best way to wire in trailer wires.

Jun 08, 2014 | 2007 Ford Explorer Sport Trac

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Can't figure out how to wire up my trailer


You will need a ground wire first.
If you have a car built in the USA since about 1985, you have separate ground wires all over the car to each electrical component. You will need to find one and add a wire for the trailer so the trailer electric will be grounded to the car.
The ground wires on 4 prong flat plugs are white in color.
If your car is older than that, you can drill a hole in the metal frame and attach the ground wire to the frame at the rear of the car.
Next do the taillights.
Find the hot wire to the taillight on either side or to the license plate light and add a wire to that one to go to the trailer.
This wire is usually brown if you are using a flat 4 wire plug set up.
The next wire is the left turn signal, that wire is usually yellow in color, Finally, the right turn signal wire is green.
Understand you can have a real conflict if the trailer light do not match the car lights.
In that case, you may need to buy an adapter to make them work. What I mean is, if you have a separate bulb on the car for the turn signal and for the brake light, that will not match most trailers, and you will need to buy an electronic adapter.
God bless your efforts.

Nov 11, 2017 | Cars & Trucks

1 Answer

Installed a brake controller and the green light won't go on. I am told I need to add a fuse where is the fuse box to add the fuse so that the system recognizes the brake controller in a 2002 Eddie...


Hi, this may true if you connected the trailer brake to the connector on the factory wiring harness. There are several fuses that are needed for trailer towing. In the box by the battery, fuses 13, 25, 27, 53, and 54 are needed. You will need a relay in relay slot 19 for the trailer running lights, a relay in relay slot 20 to charge the trailer emergency battery; and, if your trailer has backup lights (6 or 7 wire connector), you will also need a relay in the relay slot 15. If you did not use the factory connector for your trailer brake controller, check to make sure you have connected the controller to an appropriate power source in the truck. Please let me know if you have questions, and thanks for using FixYa.

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Instructions for wiring a moving trailer connector


accessconnect_logo.jpg


Trailer Wiring Diagrams 4 Way Systems

4 way flat molded connectors allow basic hookup for three lighting functions; right turn signal / stop light (green), left turn signal / stop light (yellow), taillight / license / side marker (brown) and a ground (white).

4%20way%20wiring.jpg 4way_vehicle.jpg 4 way tow vehicle side.
4way_trailer.jpg 4 way trailer side.
5 Way Systems

Same as 4 way system listed above but adds a extra blue wire for brake signal or auxiliary power. Used on pop up camper trailers or utility / boat trailers.
5way_vehicle.jpg 5 way tow vehicle side.
5way_trailer.jpg 5 way trailer side.
6 Way System, Rectangle Plug 3/4 inch by 1 inch 6 way rectangle connectors right turn signal (green), left turn signal (yellow), taillight (brown), ground (white). The red and blue wire can be used for brake control or auxiliary. Use on a small motorcycle trailer, snowmobile trailer or utility trailer. Can also be used as custom wiring on trailers with 3 light/wire systems. See "Tow Vehicle Taillight Wiring" below.
6way_rectangle_1.jpg 6 way tow vehicle side.
6way_rectangle_2.jpg 6 way trailer side.
6 Way Systems, Round Plug

Round 1 1/4" diameter metal connector allows 1 or 2 additional wiring and lighting functions such as back up lights, auxiliary 12v power or electric brakes. Note: The black (sometimes red) 12v and blue electric brakes wire may need to be reversed to suit the trailer. Check with a test light or VOM. Uses: horse trailer, travel trailers, landscaping trailer, car trailer, etc.


6way_vehicle.jpg 6 way tow vehicle side.
6way_trailer.jpg 6 way trailer side.
7 Way Systems

Round 2" diameter connector allows additional pin for auxiliary 12 volt power or backup lights. Uses: heavy duty landscaping trailer, car trailer, boat trailers, horse trailer, travel trailer, construction trailer, etc. Check with a test light or VOM.


7way_vehicle.jpg 7 way RV flat blade tow vehicle side.
7way_trailer.jpg 7 way RV flat blade trailer side.

Jan 01, 2011 | 2001 Pontiac Montana

3 Answers

We have recently acquired a 2010 Fort Ranger, which have a 4 wires connection, but our trailer Venture 1080 have 6 wires with surge brake system. We want to know how to do this connection?


Is your trailer within the tow limit or your Ranger? If it is within the limit ... go to the auto parts store and get the proper plug that should plug directly into your Ranger to provide the signal you need. You will probably have to add a brake controller and find the wire for the brkes under the dash ... presuming your ranger is so wired.

Sep 25, 2010 | Ford Ranger Cars & Trucks

1 Answer

Wiring diagram to add trailer connectionTrailer


http://www.youtube.com/watch?v=EgajKpMgZpE
He installs it in the video.

Jul 17, 2010 | 2001 Toyota Tacoma

1 Answer

Want to add wiring for small trailer


easy.. just buy the wiring at a walmart .. the wiring just attaches to your wiring to the back lites.. easy to do home project

Mar 20, 2010 | 1999 Mercury Grand Marquis

1 Answer

Trailer Lighting Kit


Do u have a 4,5,6,or 7 way (wire) system? If it's 4 way it allows basic hookup for 3 lighting functions:
GREEN is right turn signal and stop light, YELLOW is left turn signal and stop light, BROWN is license, and side marker lights, WHITE is ground.

5way is same as above, but adds a BLUE wire for brake signal or aux. power. Its used on pop up campers, utility and boat trailers.

6way (rectangle plug) green=right turn signal, yellow=left turn signal, brown=taillight, white=ground, red and blue can be used for brake control or auxilary. Used on small motorcycle trailers, snowmobile trailers, utility trailers.

6way Round Plug, same as above, but blue is electric brakes, and black (sometimes red,) 12v; note:sometimes red/black need to be reversed w/ blue to suit the trailer.

7way adds an additional pin at plug in for 12volt power or back up lights. Whoa! hope that answers your question w/out confusing u. Let me know if u need more info.

Oct 27, 2008 | 1997 Mitsubishi Montero Sport

1 Answer

I need to add a trailer light plug to my truck. i need the tail light wiring diagram for a 2005 toyota tacoma pickup.


The diagram will do you no good it you do not have amber turn signals on your trailer. What you need is a "black box" that, when wired correctly, interprets the amber turn signal on the truck into a pulsed flash to the red brake lamp on the trailer. If the trailer does not have amber turn signals, it is impossible to wire a harness with a diagram. Sorry.

Aug 08, 2008 | 1995 Toyota Tacoma

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