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Running lights on trailer wont work - 2004 Ford Explorer

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Always check the ground wire, connections, and grounding bolt by cleaning and coating with di-electric grease. The harness plugs also get dirt and bug larva in them. on the vehicle the ground wire is the exposed terminal then next t-l-r as in trailer! t-tail lites, l-left brake, r-right brake. The running light use less electric and if the ground is weak you will get no lite. sometimes the brakes will work some what as they will backfeed or get some juice.

Posted on Apr 03, 2015

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Check your ground , may need cleaning

Posted on Apr 03, 2015

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Fuse 27 in the underhood fusebox is for trailer park lights

Posted on Apr 03, 2015

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2 Answers

Where is the trailer lamp fuse on a 2007 dodge ram?


check the wiring in both plugs as it may be a wire for the lights is loose or broken in one of them

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92 Jeep Cherokee trailer running lights wont work


there are 2 systems. you mixed them, (bad_)
that takes a special adapter.
if in USA, ask the Uhaul shop for where to get the correct adapter.

your trailer is wired, old fashion, with separated wire to each function.
the car is not. (wired like 60 chevy)

option 2, is go to jeep and get the trailer kit. bingo.

option 3.?

http://www.etrailer.com/t1-1992_Jeep_Cherokee.htm

some walfarts sell em , too.
random look, you must do your homework there, car, year, etc
hopkins.
http://www.walmart.com/search/search-ng.do?search_constraint=91083&Find=Find&_ta=1&search_query=hopkins%20trailer%20wiring&_tt=hopkins

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Trailer wiring problem. Tow vehicle is a 2008 Grand Caravan with 4 wire plug. Double checked, plug function works fine. When trailer is plugged to tow vehicle with tow vehicle lights OFF the trailer...


Most likely the brown wire from the trailer connector is connected to a constant battery voltage source, and it should be connected to the vehicle running light circuit, however someone might have wired the trailer connector up that way on purpose so that the trailer does not draw power from the vehicle running lights and possibly damage the vehicle running light circuit. (Dodge/Chrysler vehicles do have delicate lighting systems) Here are some images to help assist you, and the 4 way connector is the same as the 5 way connector just without the blue wire for the trailer brakes.


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Jul 06, 2010 | 2008 Dodge Grand Caravan

2 Answers

Running trailer lights not working, but brake


Did you check the fuse for the trailer tow adapter paring lamps ? This is a separate fuse powered by a relay, it is not the same circuit as the truck's parking lamps.
This is fuse # F10 & The half size ISO relay, R201 in the fuse panel in the passenger side kick panel.
This is based upon being a new body style 2004, not the 2004 Heritage or Lightning models, those are different fuse & relay locations.

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I tried to connect a utility trailer but the lights wont work


most trailers don't have fuses, but rely on the car fuses, and if the car lights go on, that can't be it.
You need a test light.
Check if the current is getting to the trailer connection, then check at the trailer bulbs.
But the ground connection is the most likely if none work.
The trailer itself is the ground for the lights, but you need a brown wire from the trailer frame to car frame/ground.

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1 Answer

05' Sierra 1500 trailer break lights


try http://www.etrailer.com/faq-wiring.aspx. This should help. Make sure the lights and trailer are grounded. Especially with a tilt trailer. The tilt pins carry the ground. Run a ground strap from the frame to the bed.

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Trailer running lights


check trailer ground

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