How do I hook a 3 pin connector to a 4 pin?

[calstar]

First post here! I recently purchased a small camper and the runnig lihgts(I assume thats what it is) have a 3 pin connecter, can I just plug it into the 4 pin splitter I have or do I need an adaptor?

Here it is:



thanks, Brian

[calstar]

.Get an adapter is my suggestion

You should convert the trailer to a standard four wire.

I have been unable to locate an adaptor, google searched but no luck. Don't have a clue on how to convert the camper to four wire, I'll search the net and see what I can find.

thanks, Brian

[enblethen]

Three wire as shown would normally have turn signals and brake lights but no taillights.
I would start by using a small jumper wire to see what functions are working on the trailer. Connect jumper to a good battery, use jumper cables to attach battery ground to rig. Then connect positive jumper lead to yellow and then green to see what actually works.
Follow black wire to see if it operates a function or is the ground.
You should convert the trailer to a standard four wire.

[cekkk]

Don't know if it would work, but it's not a very sanitary solution. Get an adapter is my suggestion.