shaker 500
I can really relate to what you've been through Ira.. in fact just this past summer, I went through 2 batteries in less than 3 months, each from sitting no longer than 10 days, I then had the vehicle towed to my original dealer, not just once, but twice and all i got was the same excuse, they couldn't determine nor figure out why or what could be causing a drainage problem, claiming that the results from the diagnostic testing of the electrical system, were normal, so after they replaced both batteries, I decided to try a different dealer and get a second opinion... and here is what they discovered.. after doing a voltage test on every single fuse, there was a 1.4 miliamp draw on the radio and amp fuse, and also after the vehicle had been shut down after 40 min. the shaker 500 became activated and attempted to scan for CD's and both the technician and myself made certain that everything was turned off, during the 40 min. that the car was shut down. so what they did next was pull the shaker 500 out, recheck the same fuses a second time, and yet even with the shaker 500 pulled out, after another 40 min. the radio fuse was still drawing 1.4 miliamps again, so after not being able to figure out what else could be connected to that fuse...the service manager finally got a hold of a Ford engineer, and was told that the amp has to also be disconnected, otherwise there will still be current going through the radio fuse, even if its shut off, and although this did not make any sense.. it seemed that he was right, there was no current drawn after disconnecting the amp... It was then determined that it was the shaker 500 that was the cause, so they went ahead and installed a replacement shaker 500 C and needless to say, after nearly 5 months later...my car has sat for sometimes 3 weeks and haven't had any furthur battery issues...so I hope that anything I've mentioned, may be helpful and useful to you, and if you happen to have any questions, just let me know, and I'll do my best to answer them... RP