Marker Light short 1974 Overlander

[AirMarkTX]

I was replacing the yellow marker lights on the front of my 74 Overlander (27', rear bath). After replacing and successfully testing the first three lights I was working on the last light. It did not work at all. I pulled the light off the rig and noticed that it was not connected to the wire. I noticed that the wire which connected to the marker light had slipped back behind the aluminum shell. I noticed that the wire was just inside the shell so I took some forceps and pulled the wire out. When I did that my forceps touched the metal wire and it sparked shorting it out. I assumed that I blew a fuse and checked the main panel. I had 2 blown fuses. I replaced them and the marker lights still did not come on when I turned on the headlights of my tow vehicle. Can anyone tell me what may be wrong? All of the marker lights are now not working. Is there another fuse panel? If so how do I get to it.

[HiJoeSilver]

There are separate fuses for the circuits coming from the tow vehicle. They can be in a few places. Does your fuse panel have a small section over to the side of the main fuses? Still on the univolt? My 74 service manual is in storage right now. Check along the forward bulkhead should be close to where the trailer connection comes in.

You're lucky you were able to get the wire back out.

[Nuvite-F]

Welcome to the forums!

Also check for a fuse in the tow vehicle, since the trailer stop/turn/tail lights are powered from there.

[HiJoeSilver]

Originally Posted by Nuvite-F

Welcome to the forums!

Also check for a fuse in the tow vehicle, since the trailer stop/turn/tail lights are powered from there.

Yep if you were still connected to tv from earlier testing.

[AirMarkTX]

Thanks for the help. I checked the shop manual and in the wiring diagram it shows a 12 volt, 25 amp circuit breaker.
See attached. I tried to find an access panel but could not find one this morning. There is a small plastic access cover behind the front couch but when I removed it I found the tow connector wiring but could not see the circuit breaker. Do I need to remove the interior front wall that is riveted on to access the breaker or is there something obvious that I am missing?

Thanks for the assistance. This is my first airstream and the first time I have used this forum. You will definitely see more posts from me in the future.

[Al Boondy]

Mark
Are you sure that the schematic shows the circuit breaker on the running light circut?
There should be a circuit breaker under access panel but it is not for running lights but for the wire that charges your house battery by tow vehicle. See photo.

[J. Morgan]

Get a test light, make sure you are getting power from the tow vehicle first. Then check the trailer system.


Gradiens super tenui glacie.

[Lumatic]

As implied in above comments the fuses in the trailer have nothing to do with the marker lights. You probably blew a fuse in the TV

[J. Morgan]

Newer vehicles often have "interesting" fuse arrangements for trailer lights scattered about in two or more fuse box locations.

Simplicity is a forgotten concept....

Modern Chrysler vehicles use a "buss" arrangement that uses no fuses for trailer light circuits... when it blows it blows....


Gradiens super tenui glacie.

[HiJoeSilver]

Originally Posted by Lumatic

As implied in above comments the fuses in the trailer have nothing to do with the marker lights. You probably blew a fuse in the TV

Some trailers have fuses in the trailer for running, brake, turn, reverse lights in addition to tv fuses. It's a matter of finding the fuse panel. It could be many places.

74 may not have had separate panel.

Definitely check the tv fuses though.

[TheGreatleys]

My 74 overlander has no fuses for running lights from the factory. That breaker you see is accessible in the access panel behind the gaucho, and it's an auto-resetting breaker on the TV positive, not the running lights.

[AirMarkTX]

Thanks. I am glad I consulted Air forums before moving forward...

[HiJoeSilver]

Originally Posted by AirMarkTX

Thanks. I am glad I consulted Air forums before moving forward...

So does that mean you got it working or that we just confised the hell out of you?

[AirMarkTX]

Marker lights working. Thanks! It was the TV.