No Running Lights on Trailer

ElLobo888 · 05-16-2009, 07:19 PM

Hey

I am in need of some help. I am getting ready to move and I need to trailer some motorcycles but the my 99 Explorer Sport does not have any running lights on the trailer. If I hook the trailer to a different SUV it works fine so I am pretty sure it is not the trailer.

The SUV running lights still work fine so it is somewhere in the trailer lights but I am not sure. I have tried tracing it back and just can't figure it out. Is there an inline fuse somewhere?

Any Suggestions?

Thanks in advance

GreenMando · 05-16-2009, 08:41 PM

I use a tester that verifies proper wire placement on the outlet and plug.
You may need to use a test light and check them one by one.
You don't mention if it is 4 wire or 7 pin.

RichCresci · 06-21-2009, 09:43 AM

Check The fuse under the hood, that was my issue.

SLVRTRC · 07-14-2009, 08:25 AM

Quote:

Originally Posted by RichCresci

Check The fuse under the hood, that was my issue.

recently this weekend i experienced the same problem what fuse would this be?

SLVRTRC · 07-15-2009, 02:18 PM

Quote:

Originally Posted by SLVRTRC

recently this weekend i experienced the same problem what fuse would this be?

fixed mine... was the #25 fuse under the dash

prince402 · 07-05-2012, 11:47 AM

I've got no running lights and no brake lights. The turn signals and flashers work. 94 EX EB. Plugged into trailer harness round-7 terminal inboard of bumper, passenger side.

Checked fuses under dash and under hood, i.e. fuse box and distribution box. They are OK.

See another thread on this: http://www.explorerforum.com/forums/...d.php?t=320430

Please post any solution for this you may know.

stoffer · 07-07-2012, 01:45 PM

it's probably the ground...

try adding a groud wire (on the tow rig, from the trailer plug to the frame, if it works then use the groud you just ran and forget the stock ground wire)

prince402 · 07-08-2012, 06:09 AM

Thanks for the ground reminder. I've tried that and my running lights are still out.

I got brake lights by disconnecting the battery for ten minutes and reconnecting it. See the second link below for details. Now I have all lights except for the running lights.

The three trailer harness relays are above the driver side rear wheel in the jack compartment. I can hear the relay for the trailer running lights click. I switched in a known good relay and the lights are still out.

Very good info here including why there are multiple grounds in the Ford 7 to 4 adapter:
http://www.explorerforum.com/Singlet...lerwiring.html
More good info including battery disconnecting to reset circuits:
http://www.justanswer.com/ford/6jynz...er-wiring.html

I'm going at it again today with my test meter (vom).

prince402 · 07-08-2012, 01:35 PM

SOLVED

I now have all lights including running lights.

See my post in the other thread on the same topic:
http://www.explorerforum.com/forums/...d.php?t=320430

05-16-2009, 07:19 PM	#1
ElLobo888 Wannabe Elite Explorer Waxahachie, Tx 99, Explorer Sport Join Date: May 2009 Posts: 1 Vehicle Specs (Original Poster)	No Running Lights on Trailer Hey I am in need of some help. I am getting ready to move and I need to trailer some motorcycles but the my 99 Explorer Sport does not have any running lights on the trailer. If I hook the trailer to a different SUV it works fine so I am pretty sure it is not the trailer. The SUV running lights still work fine so it is somewhere in the trailer lights but I am not sure. I have tried tracing it back and just can't figure it out. Is there an inline fuse somewhere? Any Suggestions? Thanks in advance

07-05-2012, 11:47 AM	#6
prince402 Wannabe Elite Explorer 1994 Eddie Bauer Join Date: Dec 2011 Posts: 53 Vehicle Specs	I've got no running lights and no brake lights. The turn signals and flashers work. 94 EX EB. Plugged into trailer harness round-7 terminal inboard of bumper, passenger side. Checked fuses under dash and under hood, i.e. fuse box and distribution box. They are OK. See another thread on this: http://www.explorerforum.com/forums/...d.php?t=320430 Please post any solution for this you may know. __________________ My 1994 EB Explorer at 166K Miles: http://s629.photobucket.com/albums/u...view=slideshow Last edited by prince402; 07-05-2012 at 05:11 PM.

07-07-2012, 01:45 PM	#7
stoffer Wannabe Elite Explorer Texas a couple trucks... Join Date: Jul 2012 Posts: 3 Vehicle Specs	it's probably the ground... try adding a groud wire (on the tow rig, from the trailer plug to the frame, if it works then use the groud you just ran and forget the stock ground wire) __________________

07-08-2012, 06:09 AM	#8
prince402 Wannabe Elite Explorer 1994 Eddie Bauer Join Date: Dec 2011 Posts: 53 Vehicle Specs	Thanks for the ground reminder. I've tried that and my running lights are still out. I got brake lights by disconnecting the battery for ten minutes and reconnecting it. See the second link below for details. Now I have all lights except for the running lights. The three trailer harness relays are above the driver side rear wheel in the jack compartment. I can hear the relay for the trailer running lights click. I switched in a known good relay and the lights are still out. Very good info here including why there are multiple grounds in the Ford 7 to 4 adapter: http://www.explorerforum.com/Singlet...lerwiring.html More good info including battery disconnecting to reset circuits: http://www.justanswer.com/ford/6jynz...er-wiring.html I'm going at it again today with my test meter (vom). __________________ My 1994 EB Explorer at 166K Miles: http://s629.photobucket.com/albums/u...view=slideshow Last edited by prince402; 07-08-2012 at 06:43 AM.

07-08-2012, 01:35 PM	#9
prince402 Wannabe Elite Explorer 1994 Eddie Bauer Join Date: Dec 2011 Posts: 53 Vehicle Specs	SOLVED I now have all lights including running lights. See my post in the other thread on the same topic: http://www.explorerforum.com/forums/...d.php?t=320430 __________________ My 1994 EB Explorer at 166K Miles: http://s629.photobucket.com/albums/u...view=slideshow

05-16-2009, 08:41 PM	#2
GreenMando Wannabe Elite Explorer Columbia, CA '08 Sport Trac XLT 4x4 V8 Join Date: Dec 2007 Posts: 448 Vehicle Specs	I use a tester that verifies proper wire placement on the outlet and plug. You may need to use a test light and check them one by one. You don't mention if it is 4 wire or 7 pin.

06-21-2009, 09:43 AM	#3
RichCresci Wannabe Elite Explorer New Jersey 03 XLS Join Date: Jun 2009 Posts: 289 Vehicle Specs	Check The fuse under the hood, that was my issue.