Second, I am sure this subject has been asked/covered many times, but I couldn't find a specific answer to my question.
I wired in a 7 pin socket to our hatchback and after a couple of boobies (I shorted the tail lights and a red herring was one of the 301 bulbs had actually died of old age, but it confuddled me for a bit


Now I knew the car had can bus and wasn't particularly concerned, after all I was simply adding tails to the loom. Everything works beautifully while pulling our 29yo Swift.
My question is, should I really have to install a smart relay? I have wired it correctly (I detest these sorts who put left/right tail lights onto one side so if the fuse goes you are left with no side lights on your trailer...) and the car does everything it should.
However, I can't tell if out car has a dash warning for a trailer being plugged in (you know the indicator flashes fast if a bulb is blown on the trailer) and such.
Anyhoo, any advice will be gladly taken on board.
I have ordered an automatic split charge relay (self switching) for the caravan battery & fridge. Looking for a pointer as to should I wire the main + to the alternator output or just onto the battery + terminal as I am unsure if this car has a smart alternator or a standard one!
So many questions

Thanks all
