installing a cd/mp3 player. for a wire controlled by terminal switch, meaning power comes on when you turn the key on.... what do ya'll use? 

Do you connect it straight to fuse block

My 71 had a three wire plug that powered the radio. It is a square plug with B, W and ? (Can’t remember) the blue will have a fuse holder. Don’t confuse it with the defroster which is similar with a red wire. If memory serve me right. 

On 10/20/2020 at 5:48 AM, Wally said:

installing a cd/mp3 player. for a wire controlled by terminal switch, meaning power comes on when you turn the key on.... what do ya'll use? 

Do you connect it straight to fuse block

I would use the wire the original radio used.

Then, for the clock memory, either find a wire that is hot all the time and splice into it, or run a wire from the battery, and be sure and use an inline fuse as close to the power source as possible.