Accesory with PROM
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From: Roscoe, IL
Car: 1991 Trans Am
Engine: LQ4
Transmission: T-56
Axle/Gears: 3.70
Accesory with PROM
My PROM is off to John Millican for reprogramming, and I want to test my new speakers. Would it be safe to turn the car to accesory with out the prom. What about disconnecting the ecm itself?
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