Wiring an aftermarket radio?

[jmbass98]

Picked up an aftermarket radio unit from RetroSound.

https://www.crutchfield.com/p_068REDONRS/RetroSound-Redondo-RS-M4-Chassis-Only.html

Manual calls for yellow wire to constant 12v source. What is the best way to do this?

'66 Charger. New to electrical stuff so I want to make sure I get this right.

 

[493 Mike]

Tap into a wire from the fuse box, one that is hot with the key off, and add a additional fuse of the size recommended by RetroSound in the yellow circuit.
Mike

 

[bee71]

When I did my RetroSound unit for my 71Bee I just used one of these and put a line fuse on that yellow wire. Simple.
Standard Motor Products HP3020 Standard Motor Fuse Taps | Summit Racing

 

[Ron H]

Yep - that's how I tapped it in to block...power source for radio with key on. If you haven't looked at the fuse block, this is a good time to take a good look at it. I had some aged-corroded connections and a cross contact occurring (sometime before I installed the radio). The old blocks were small, smaller than they needed to be with clearance available; but was what it was. Not the first time either when installing radios or gauges where came across crap wiring done for radios, cassette players, speakers etc. Better yet a modern block harness; but haven't needed to cross that bridge yet.

 

[451Mopar]

Use a piggy-back spade connector at the back of the fuse block.

Something like this:
https://www.amazon.com/PONFY-140PCS...gyback+spade+connectors&qid=1625928405&sr=8-8

 

[diesel_lv]

An easy "constant on" wire to tap into is your cigarette lighter wire or the lighter fuse at the fuse block.