Harness question

[AJM511 10+ year member]

Im buying a deh-p4200ub from ebay, and I'm wondering if i can use the harness already in my truck, attached to an old sony xplod head unit. Or do i have to buy one from wal mart or something? Thanks in advance

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[helotaxi 5,000+ posts]

Cut the old harness at the splices where it was joined to the radio harness and splice it to the radio harness for the new radio.