tom its mainly down to fault finding technique and a few years of experience from the electrical trade
then applying it to the car electrics
you need to gather all the info before jumping in with both feet
i knew he had changed stuff
checked all the explosives
remade seat plugs
buypassed all the explosives
ask him to check if the new Ecu had a passenger bag?? he phoned someone
bingo! remove glovebox find connector and link
at the end its only wire's and explosives
then applying it to the car electrics
you need to gather all the info before jumping in with both feet
i knew he had changed stuff
checked all the explosives
remade seat plugs
buypassed all the explosives
ask him to check if the new Ecu had a passenger bag?? he phoned someone
bingo! remove glovebox find connector and link
at the end its only wire's and explosives