Hi all,
Sorry to be a pain and I know this is possibly one of the most talked about issues. I'm currently in the boot trying to figure out why I have no power to the sat nav unit. I've checked the connections and all seem good with no water damage. My next step was to check for power and earth, but which wires are which?? Don't want to just go poking my multimeter anywhere!!
Thanks in advance.

earth on the body look for a live in all the connectors if you find a good 12v+ it maybe the satnav drive at fault