Question about Dodge Ram 1500

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What fuse goes to the 7-way trailer plug that charges the trailer batteries for a 2012 RAM 4X4

Circuit tested the factory-installed 7-way trailer plug. All terminals have power as necessary EXCEPT for the one that charges the trailer batteries when it is being towed.

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  • Dodge Master
  • 3,679 Answers

The power for the battery charging usually goes directly to vehicle battery with an inline fuse , hope this helps

Posted on Nov 22, 2014

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: 2005 2500hd silverado 4x4 factory

you have to put the fuse in to make it hot

Posted on Aug 12, 2008

  • 32 Answers

SOURCE: 1996 Dodge Ram Factory Trailer Wiring Schematic

all you need is a cheap continuity tester, any one to help tap on the brakes..7pin is just like the 4 pin w/extra power wire for acc.lites,electric brakes.when you buy the 7pin rec.,comes w/wiring schematic standard to all trailer rec.- you can do it..kev-mn.

Posted on Dec 10, 2008

  • 2 Answers

SOURCE: how do I get 12 volts at the factory installed trailer connector

You are correct. There is a fuse in the underhood fuse/relay compartment that powers up the pin. It is one of the larger fuses and should be labeled as "AUX". Also check that the power wire is connected to the AUX bolt terminal. They shipped from the factory disconnected and the cable was zip-tied to something below the fuse box.

Posted on Aug 26, 2009

Testimonial: "I knew there had to be something needed done, I'll check in the morning under the fuse panel for a wire to terminate and see what happens. sounds log"

pops296
  • 174 Answers

SOURCE: Factory Trailer tow package - fuses?

Look in the owners manual first. I have seen some of the fuse boxes under the back seat on the drivers side. Also try http://www.etrailer.com/faq-wiring.aspx. This should help. Mike

Posted on Oct 02, 2009

pops296
  • 174 Answers

SOURCE: factory trailer connecter for trailer plug in - no current

Also try http://www.etrailer.com/faq-wiring.aspx. They have a great website with lots of info. Check ground.

Posted on Oct 07, 2009

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1 Answer

2004 Chevy Express 1500 keeps blowing trailer light fuse


If you're only blowing the fuse while the trailer is plugged in, the problem is in the trailer/wiring. This takes into account that the truck has a factory installed 7 way receptacle. If that's not the case, the problem can be in the incorrectly wired truck and the trailer is ok.

On the truck, looking into the 7 way receptacle should be as follows.
Top left=Tail Lights
Top right=12v steady source/charge line
Left middle=Left turn/brake
Right middle=Right turn/brake
Left bottom=ground
Right bottom=brake controller output
Center=reverse lights if your trailer is equipped.

Your trailer plug should mirror this.

This is the standard.

Oct 25, 2013 | 2005 Chevrolet Suburban

1 Answer

Where is the trailer fuse located on a 2012 jeep grand cheroke


depends if the person , installing trailer setup
used the factory kit
or just cut in to your wiring.

my 2010 WK has a fuse.
why not say what fails.? first.
brakes
blinkers L and R
parking lights.
and if the cars lights are effected?????? or hazards.

which location, will the fuses are all under-hood.
the operators guide names them all , lost that.

the factory kit comes with trailer relays to add to system.
this protects the system best from trailers that short out.
best is to set it up like that. using real jeep kit.
but we can fix yours. as soon as you answer the questions.
im not posted all fuses for all 4 circuits,

fess up and get free answers.

Jan 15, 2012 | 2012 Jeep Grand Cherokee

1 Answer

Have no power out of the trailer plug 4or 7 prong,where should i look for the trouble?


Not sure which part you mean no power.

For the New Body style 2004 ( not a Heritage or Lightning model )

If both Stop / Turn pins & the parking lamps, might want to check the ground pin to make sure it is good ( or what you are using for ground on the test light / meter ).

The trailer tow parking lamp circuit is fuse #10 to the parking lamp relay

The stop / turn circuits also have fuses on each one, Fuse #36 & Fuse # 42 ( R & L ).

The 7 pin has fuses for the battery charge pin ( hot in run position ) and the reverse circuit ( hot in run & when in reverse ), Reverse is also fuse # 10 to the trailer tow reversing lamp relay & the battery charge pin is fuse # 106 to the trailer tow battery charge relay.

Could be all the fuses are blown, or what you are using for ground on the meter / test light is not a good ground.

Mar 16, 2011 | 2004 Ford F150

1 Answer

I have a 2003 ford F150 and I bought a factory plug in trailer harnes but the only light that work now is the running light I got back under truck and tried the harnes with a tester and it seem the trailer...


The fuses for the trailer tow adapter are in the normal fuse panels.

Engine Compartment fuse panel
101 - Is the battery charge circuit ( hot in run position )
20 - Left Stop / Turn fuse
19 - Right Stop / Turn
5 - Trailer tow reversing lamps & Trailer Tow parking lamps

Cab Fuse Panel
23 - fuse for the relay for the trailer tow battery charge circuit

All of these are in the owners manual

If you did not get an owners manual with your truck ( purchased used ), you can download one from Ford :
https://www.fleet.ford.com/maintenance/owners_manuals/default.asp

Oct 04, 2010 | 2005 Ford F-150

1 Answer

2009 Silverado 4x4 pickup with towing package and factory installed Trailer Brake controler installed at factory. The system has worked in past. I had my Stock trailer rewired and things tested out fine...


It sounds like you lost a ground.
check traier hookup first.
Probably not the controller.
P.S. There are multiple fuses for this setup. check all ! ! !

Aug 19, 2010 | 1999 Chevrolet Silverado 1500

1 Answer

Why isn't my trailer connector charging the RV battery? I placed a fuse in slot 106, but it still doesn't appear to be working at the factory installed pigtail.


Might want to bench test the trailer tow battery charge relay.

You can also jumper this with a wire in the relay socket, to test the wiring to the trailer tow adapter. This is relay R05

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Apr 20, 2010 | 2004 Ford F150

1 Answer

Batt wont charge on my trailer from my 2009 f-150


Here's a wiring diagram

If you look at the illustration, it shows the center is an auxiliary power source. If there's nothing hooked on the tow vehicle's plug, you may need to run a wire to the switched side of the starter solenoid. Make sure you fuse it with an inline fuse. Make sure your wire in sufficient gauge and your fuse is ample to protect all your circuitry. you may even want to put a 20a circuit breaker inline and then run from cable that at least matches or is a gauge size higher than the trailer's aux power cabling size..



Oct 25, 2009 | 2009 Ford F-150

1 Answer

R.h trailer plug has no out put? checked all fuses, all the signals on the truck are fine? just the trailer plug


Take the plug apart (small set screw on the side) and make sure one of the wires hasn't popped out. Take out the screw and slide off the cover to see.
You will need a mini screwdriver to re-tighten the brass terminal if its the case.
Have you tested this with a test lite?
Good luck.....

May 28, 2009 | 2004 Chevrolet Silverado 1500 Crew Cab

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