ground problem

[project_tenkill]

I have an older coachman camper,31' im pretty sure i have a ground problem as my trailer lights do not work. But im not sure where it grounds because the wiring harness goes up the front wall. Any body have any ideas, i think its s coachman crown deluxe about a 78 model.

[enblethen]

Should use electrical grease (de-oxidation) between the lug, bolt, frame and nut. Use a star washer between nut and frame.
This is of course after cleaning frame to bare metal on both sides. Do not use tapped hole in frame or self tapping bolt/screw.
You can use the same electrical grease on the ground mounting screw in the lights.

[Lynnmor]

Chuck_thehammer wrote:


all bolted to the FRAME... remove / clean / sand/ install star washers/ reinstall

I would add; spray the connection with corrosion proofing when done.

[project_tenkill]

Ok thank you guys i will look at it tonight.

[Chuck_thehammer]

what year...?

I have a 2005 Coachmen Cascade.... NON metal skin..

on mine.. 3 ground points at lower front..
1 near the slide motor
2 under the area of fuse panel..

all bolted to the FRAME... remove / clean / sand/ install star washers/ reinstall

I know as I just did all of mine 3 weeks ago.

also check the mini circuit breakers bolted to the frame near the front grounds.
my 50 amp mini breaker had resistance...

[kayakcrazy]

Enblethen is correct in that the outside metal skin is used a ground wire. We had 1984 Travelaire 5er and it was the same way. Every spring I had the job of tightening every screw. Sometimes I had to get creative and had to build up the screw hole, change screw sizes and add wire.

[enblethen]

Older rigs that used metal siding used the skin as the ground return path for the exterior lights.

[project_tenkill]

Outside like the tow lights.i changed the 7 way connector still no lights. I get power on other trailers i dont have a voltmeter right now. Ill see if i can get one tomorrow. I wanted to check the ground but cant find it.

[Itchey_Feet]

Are you having problems with the outside 12v lights, or the interior 12v lights? If outside ones, could be in the plug that hooks to tow vehicle, start there -- find the one that is the ground wire and start the check to all the outer wires and see if you are getting current flow thru any of them.