Hi guys. Sorry Jacobandnickolas for butting in again but I couldn't help myself.
If it runs for two seconds and shuts off, it's in theft mode. Unlock a front door with the key. If the truck doesn't have the factory-installed anti-theft system, the used computer had it programmed in and it taught that programming to the Body Computer. That programming can not be undone. Another used Engine Computer will learn that programming now from the Body Computer as soon as the ignition switch is turned on. You will need to replace the Engine Computer AND the Body Computer at the same time before turning on the ignition switch.
The problem is it's almost impossible to know if a salvage yard computer has that programming because those guys won't know, and there's no way to tell by looking at a vehicle. The only way to know for sure, unless you know the history of the donor vehicle, is to buy a remanufactured computer from the dealer.
This is all irrelevant if your truck came with the factory anti-theft system. Any used Engine Computer and any used Body Computer will work and will upgrade to the anti-theft programming automatically if it isn't already, but from then on those computers must only be transplanted into another vehicle with the anti-theft system.
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Saturday, March 23rd, 2013 AT 11:12 PM