Flash old ecm to new ECM
Yesterday, (Subject: Flash old ecm to new ECM ) 
Post: #3
RE: Flash old ecm to new ECM
(Yesterday )tree98 Wrote:  A fan circuit code wouldn't keep the truck from starting.

If you end up buying an ECM make sure they pre flash it with the stock file at the dealer before you put your hands on it.

So what happened was i arrived at the receiver with zero problems. Shut the truck off, unload, go to start, nothing when i hit the key. I end up tapping the ecm. Still nothing. I find a wire corroded at the starter pull the wires off splice and repair the wire. Put all wires back on. Truck no cranks again. But no start and i have this new 0245 code (fan control circuit - voltage below normal or shorted to low source) amber active.

I am no a crank no start with a fan code that showed up out of no where. Absolutely zero problems until i tapped on the ecm (its factory 2010 ecm)

I have no other codes. Lift pump buzzes. ECM communicates with caltherm and Insite 100%. My best guess at this point is i jarred the ECM internally. But im open to other suggestions.
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RE: Flash old ecm to new ECM - Chamberpains - Yesterday



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