Factory Radio plugs

Mustang parts unlimited on eBay
 

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Not sure of the colors match up, but I think I have the pinouts for the radio plugs for each year if you need them
That would be great.

I cant seem to find a wiring diagram that matches my car. Some wires match some dont. Im starting to regret digging into this. The factory harness with the gray and black plugs have wires cut but there not tapped into?
 
Not sure how helpful this will be but maybe along with 5L5 info above this will make sense.
Color wire diagrams for all 1991 models regarding the radio.
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Hope this also helps
 

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New head unit installed and working. Only issue is when i turn key off i lose my settings? ACC yellow wire is power when ignition on and batt red is constant? What fuse has constant power?