Two problems related to starter have been reported for the 1998 Ford Expedition. The most recently reported issues are listed below.
My 1998 Ford Expedition began having severe electrical problems after heavy rains. The starter will cycle when the key is not even in the ignition, the ac blower remains on when truck is shut off, speedometer fails to work, transmission shifts roughly, interior lights come on, truck shuts off unexpectedly. Researched on internet and apparently many Ford trucks made in 1998 have similar problems due to leaky windshields, allowing water to enter fuse boxes. This problem could be very dangerous particularly the constant cycling of the starter in an unattended truck, and shutting off while driving. I would imagine engine fires are also a possibility given the range of electrical issues this is causing. Repairs include a new windshield and gem box, running approximately $1,000.
I have a 98 Expedition, windows roll down, stereo come on heat turns on, all dash panel warning lights come on and off,the air bag light go on and off,and the wipers and overdrive go on and off ,the starter tries to start while running it started few years ago on occasion when it would rain now everytime ,found out the windshield leaks water on the fuse box and some other generic box, I feel Ford should fix the Expedition its there default look on the internet ,there are lots of other people with the exact same prob. Please help.