running lights on trailer wont work

jstill

Cadet
Joined
Oct 18, 2008
Messages
12
my brake lights and blinkers work but no running lights. same thing on both of my trailers which tells me its the truck. i have a chevy 2500hd with a 7 or 8 pin wiring harness. i use an adaptor for one trailer wich has your regular 4 prong harness. dont know where to start. thanks for any help
 

ne7800

Lieutenant Junior Grade
Joined
Jul 10, 2008
Messages
1,195
Re: running lights on trailer wont work

Get a test light check the plug on the back of the truck, if no power there open up the harness and start working your way forward till you do find power
 

jstill

Cadet
Joined
Oct 18, 2008
Messages
12
Re: running lights on trailer wont work

nevermind, it was just a fuse. thanks . dont know why i didnt check that first.
 

ne7800

Lieutenant Junior Grade
Joined
Jul 10, 2008
Messages
1,195
Re: running lights on trailer wont work

nevermind, it was just a fuse. thanks . dont know why i didnt check that first.

:DLMAO i was going to say fuse but i thought "nah if he is asking here he has already checked that:eek:" glad it was somthing simple
 

Specialk1302

Cadet
Joined
Jun 1, 2008
Messages
11
Re: running lights on trailer wont work

i have been struggling with the same problem except with a 08 gmc pickup. was it a truck fuse that blew?
 

tashasdaddy

Honorary Moderator Emeritus
Joined
Nov 11, 2005
Messages
51,019
Re: running lights on trailer wont work

that is what has fuses in it. trailers do not have fuses.
 
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