I've got zero experience with van modifications but I am about to purchase a Transit Connect (2019), I'm having a leisure battery and split relay installed in the rear of the van.
I've been told the CAN Bus network can be complex but I would like to run an additional switch to power the wipers and the fans/heaters from the leisure battery whilst the ignition is turned off. To clarify I want to be able to turn the wipers/blowers on and off from a switch in the rear of the vehicle and I want this to be powered from the leisure battery whilst the vehicle ignition is completely off.
Does anybody have any experience running separate or additional switches to power equipment from alternate power sources? Would be keen to know if anybody has any advice, knowledge of problems I need to be aware of or equipment I should look out for?
