**trailer brake lights not working**

[Warwick89]

If you take the cover off the plug and plug it in you can test the voltage while under load.

It's a solid metal plug so I can't just take the cover off I'd have to take the whole casing off and then I don't think I'd be able to get the plug to mate

[TPC]

Have you tried tracing the wiring on your car back to where it is connected?

[Warwick89]

Started looks like I may have to take the draws out

[mudnut]

Place your bets:

A) Loose screw behind plug?

B) Bad connection at wiring loom?

C) Crimped or squashed wire

D) Corroded connection caused by water ingress

E) One of the above plus a below average earth on the trailer or socket.

F) Wiring that has been twisted together then taped over.

[TPC]

Started looks like I may have to take the draws out

I had a look at mine and the wiring is taken from the back of the lights on the bumper, do you have a GQ or GU?

[Hodge]

Mate I went through the same dilemma 5 days ago. Whoever wired up my trailer plug originally used those wire tap connectors or whatever they call them. Water got in, they got so badly corroded there was no metal left in the connectors. Absolutely atrocious job, those things are farkin' s***. They should be banned!
I ended up going to Nissan and buying a proper Y harness, plugs straight into the lights on each side and a earth crimp to chasis, no crimping or wire cutting needed.

[lhurley]

It's a solid metal plug so I can't just take the cover off I'd have to take the whole casing off and then I don't think I'd be able to get the plug to mate

Mine used to be one of those, if you take the screw out the back it will side back along the wiring. I also had similar symptoms to you, i ended up just redoing the whole thing with a new plug. no issues now.

[threedogs]

X2 with gaddy I've had nothing but trouble with lights working and not working on my trailer
my son soldered all connections for me. still the same ,,,,,,,,,,,,,,there was one more wire with a FRICKEN scotch lok on it.
re moved and soldered that joint , now all is good . point is never trust a scotch lok, solder every joint with shrink sleeve over it

You can buy trailer plug LED test lights from SuperCheap auto
do you have electric brake controller fitted ??

[gaddy]

So what was the out come ?

[threedogs]

all joins were soldered so basically one wire from globe to the battery works like it should now properly
plus I have electric brakes, everything works fine now.