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Message: [QUOTE="bismic, post: 1451681, member: 1537"] This is from Ed at FICMrepair.com - when asked how often does he see issues with the FICM logic board: [I]The answer is 'surprisingly often'. [/I] [I]Logic board issues range from the widely publicized 'no start' with solid voltage, to 'no start' with 0 volts, to missing horribly, to missing sporadically with temperature, to shutting the truck off due to lost communication with FICM (U0105) codes, sure, but...[/I] [I]what is actually FAR more common that people seemingly don't even realize is that low voltage conditions (low FICM Main Power) can also result from logic side issues that may or may not manifest themselves in lower than stellar FICM logic power numbers.[/I] [I]Depending on HOW a logic board fails, in fact, there are even a relative myriad of cases where a damaged logic board can CAUSE a perfectly awesome power board to BECOME bad.[/I] [I]It's kind of crazy, in fact.[/I] Ed sees a lot of boards and no doubt has a good "data set" to speak from. That said, 10:1 or even 100:1 is too frequent for my comfort level ....... that is if a person doesn't want to have to put up with unexpected failures. We get enough of that as it is. This is on his web site: [I]If your alternator is putting out the right voltage, but you are still concerned and just want a reason to move into a new alternator...we can help there too. We've seen many a FICM's logic board get completely fried by a bad voltage regulator - a common failure in any alternator even IF the voltage output measures within spec during your voltage test. It's a sad little reality.[/I] From the CBM web site: [B][I]What is the cause of failure on a FICM, and will it need to be repaired again in the future?[/I][/B] [I]We repair both the power side as well as the logic side that fail due to faulty components. Since we address the ROOT CAUSE of this failure, we can stand behind our FICM repairs with confidence by offering a 5 year warranty.[/I] [/QUOTE]