There is a YES/NO for each lamp: tail lights, indicatorrs, fogs. Nothing for a trailer though so I'll have to check it.

Update- I changed the tow electrics to 13 pin and took the car back to the Swift dealer. This time, the A3 module worked on their test rig. I had my A3 module in the boot so I got them to test that one as well and that worked fine.

So this morning I fitted the Module to the caravan.
Switched on the ignition and everything worked fine. Then I started the car. When the engine runs, the brake lights flash on and off slowly. If I press the brakes, they stay on as they should. Everything else is still working.

So there’s a feed going to the brake lights when the engine runs causing them to flash on and off roughly every two seconds.
Can anyone suggest a fix for this before I take a hammer to the lights?

found this a few threads down i this section, hope it helps,

http://www.fullfatrr.com/forum/topic42959.html

Thanks Stan. Looks like the exact same issue I have. I’ve messaged him

another thread andy,

http://www.fullfatrr.com/forum/topic38077.html

All sorted now. Used the mod in one of the threads above which has resolved the problem!