Hooked up a new hoppy 7 pin tow plug to my 2000 f150.Inially everything went well until I discovered I had hooked up the ground to the taillight (black/white) truck lead.Fixed this ,(ground is white on the truck pigtail)Now I have no power at all to the plug.I think its a fuse but all fuses for trailer under the dash and under the hood check out good.What am I missing? there must be another fuse somewhere thats blown and I'm just missing it.All lights on the truck are working,I just am getting nothing to the tow plug.Its wired right now but my test light gives me nothing Is there is a fuse in the factory wiring harness,surely not???????

White -ground
black and white- tail
green rt
yellow left
black and green- reverse light
blue- battery power
orange -electric brakes

 

You have some of your wiring crossed ( blue & orange ), and the black w/ white stripe is brown w/ white stripe.



Where did you wire this in ?

What are you using as ground for testing ?
Considering you changed the ground splice, might want to test to another ground / verify the ground connection. Test for resistance between the ground and the ground on the tail lamp bulb socket.

 

Well heres one for you,after switching things around orange -12 volt aux and blue brake got out my trusty test light and..nothing again,then grounded to a good known ground and still nothing.At this point I was about to give up Then I realized i was looking in the wrong place,I have a old test light that uses a buss fuse with a filament that glows.sure enough the fuse filament had burned out.Checked everything out with my 12 volt tester and it all was working. All is well now,,tossed the old test lamp bought a new one (10 bucks) and learned a lesson,test your test equipment when things don't seem to be doing what they should LOL

 

Should have spent that money on a meter instead of a test light.

 

I have two,just didn't use it initially.Figured the trusty? test light would serve my purposes.Guess not.leason learned LOL