someone cut factory plug help

[diamondX 10+ year member]

my friend has a 90 honda accord and someone cut the factory plug for the stereo and i don't know what is what. can someone help or point me in the right direction.

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[bonesninja 5,000+ posts]

http://installdr.com/Harnesses/HA-Wiring.pdf.

 

[diamondX 10+ year member]

thanks a ton saves alot of time looking at a junk yard or with a tester