blown fuse trailer reverse lights not working

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Originally Posted by coopers1969

Hi Graeme

i will check the relay next. and yes i am using the 2nd pin in the trailer plug which is there reversing pin (black wire) and the reason why i am trying to use this pin to connected to the separate LED work Lamp is so that if i am reversing at night time to a camp spot i can see better to what is happening behind me also when reversing into the yard which is tight it helps me see. As for the permanent or ignition pin wouldn't this blind people behind me while driving or can you turn it off. Can i use the white plug?
trailer wiring diagram
i have attached a link to make my self a bit clearer sorry i think i was making this harder with pin and plug terminology.
i have checked the No 6 fuse in the passenger fuse box which is the trailer reverse fuse. when you say relay is that different to Fuse? And all other lights work on the trailer.

thanks again Graeme for your help and suggestions :)

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I see the problem - you are using aus standards pin designations & wire colours. LR don't follow all of those pin designations... Ask Pete(sneigy) for a diagram (actually I think he posted one earlier) or explanation of what each pin does

thanks Graeme for the diagram, though i found the problem see photo attached. there is a fuse at the battery terminal (yellow wire) which must have been put there and connected to the rear plug at pin 2 position by the previous owner cause once i changed the fuse and put the car in reverse tested Pin 2 again WE HAVE POWER!!!
re connected and all is working rear LED spot lights and all other LED trailer lights.

thanks again Graeme

Good that you found that fuse. If the fuse is attached to the battery terminal then it must be switched by a relay operated by a reverse feed, either directly from the reverse light supply or from the trailer reverse lights supply. It seems a round-about way to get power to that trailer plug wire, being simpler to have done it in the left rear corner.

yeah couldnt agree more use a connection at the back of the car and putting the fuse down there makes a lot more sense, Oh well just another little quirk of buying a second hand Disco.

Best practice I've read is to fuse each end of long run of heavy cable - maybe the previous owner had something heavy duty he plugged in.