So the cooling fan circuit in my car decided to mysteriously short to power which melted down the ground portion in the PCM and causes the Fan to be on all the time while driving and when ever it feels like when its off. i've dealt with it for a while but i can tell the fan is now starting to crap out. checked w/ the dealer and they charge $313 for the part, $156 for the flash/repro, and $212 for labor "because they have to put it in". since i cant get my hands on a tech2 with the flash/repro software on it i was considering a used PCM. the only thing is that i cant seem to figure out if the used PCM will talk with everything else on board. i know there are different PCM part# due to select features but i had heard that they are serial number specific and may need to flashed to match. just wondering if anyone has ran into anything like this before or heard anything.
thanks.

05 LS
PCM #12597328 (12599714)