Battery problems of the 1998 Ford Expedition

First, the interior lights and running lights would not power off while all doors were closed, door ajar indicator was on. Took to dealer problem resolved for a month or so. Now need to spray wd40 on latches religiously. Dealer also replaced cruise control harness at this time. Then came the radio and heater running with the key out of the ignition. Beeps and clicks and bad smells coming from under dash. Again to the dealer, no codes found for the issues I was having. Battery draining occurring frequently now and no resolution. I now have to disconnect the battery everynight. Now when I drive down the road I get the many failure lights flashing on the dash, the windows won't work, speedometer fails, truck loses power and the transmisson shifts strangely. I was hours from home and doing 70mph on the highway when evidencing decided to not work at the same time. Then I realize that this is occurring only when it rains or is very wet out. And I was truly afraid for my life and the others that were on the road with me. I had to drift across a lane of traffic with no power to get to the side of the road. I put the truck in park and put my head down, whew, and the motor powered back up and all the failure lights were off. Only after investigating on the internet today do I find out this is a common problem. And the fix. . . Replace the windshield seal! and possible damaged fuse box and gem! now why didn't the Ford dealer help remedy this problem one of the many times I was in? this problem has been occurring for several years. New windshield $165 and they come to the house. I paid big money for "no codes match your issues, miss. ".

Gem module/ecu failed - corosion found on ba box fuse assembly - progressive and randon symtoms over period of time prior to complete failure - Ford looked at problems previously and never corrected(replaced batery worn out from repeated drains). Caused electrical backflows into various systems when power off such as ac, radio, engine etc. . . Draining battery numerous times and causing a potential fire hazard. . . . Caused airbags to become disabled. . . Compromised abs braking randomly. . . These sysmptoms occurred many months prior to total failure at which time many really weird sysmptoms made the car virtually undriveable at speed. . . Transmission changing gears erradically. . . Speedometer works off and on. . . Engine cycle thru startup cycle over and over while driving.