Hey im wanting to install a led strip as i have the back panel removed for weight.
I have a white led steip to install i would like to attach it to the orgin wiring. Do i put the red wire to 421 and the black ground to 422?
Its abit strange as when i close the door the meter shows 12v on the 422 when i have my black grounded from the meter. Just wanted to see if anyone else has succussfully replaced their interior light
Ive tried pinning a wiring diagram for you but forum wont allow me to upload an iphone pic 
Regards lee