I know that your not trying to start an argument GP ? and I feel your frustration believe me.. I was going through it for almost a year and took my car to 3 different dealerships who tested everything from the shaker 500 Amp, to the active alarm and every fuse in the engine bay and the only conclusion the field service engineer was able to pinpoint to was the K.A.M ? does this mean that I'm satisfied ?? hell no I'm not and I still don't understand why I have to keep my Stang Plugged into an automatic tender charger in order to prevent their crappy Motorcraft batteries from going dead from sitting anywhere from just 7-10 days as it still doesn't make any sense to me at all..As for why the K.A.M doesn't drain all the S-197 Stangs ? I honestly don't know and if I did ? you would be the very first to know about it but I can tell you that I've noticed quite a few members not only from this forum but also from other Mustang forums, who've complained their batteries have also gone completely dead in the very same 7-10 day period as mine has and it seems very strange when you end up finding out how so many hundreds of other S-197 owners would complain about the very same problem as you have to the point where something like this has to be far more than just a coincidence wouldn't you think ? Now let me ask you this ? what is the longest period you've let your Stang sit since you replaced your Motorcraft battery with your Optima ? and have you experienced any further battery failures since ? anyway when you get a chance could you let me know because I'm extremely very interested and curious...
Longest sit time so far with the Optima is 6 days. I have not turned off any of the accessories before shutdown and I have not experienced any issues.