I feel like doing this i know it is possible, im pretty confident in doing it. But there's a few things im not sure about.
If the head unit can be wired up and all working correctly, im good to go from there with wiring up speakers and amp etc.... now i know what all the wires do for the connections on the unit. Obviously, Live would wire straight to the live terminal on the battery, and earthing to the earth on the battery.
1. what would i wire the ignition wire to, and the other wire that dims the display when the you turn the headlights on?
2. What could i use to earth the battery out to? anything at all metal?
Thanks for the help