ha ha, im not sure, this seems a seperate fault to that of the engine management. try checking fuses or relays. have you got the original hand book to the mondeo? this wil help locate fuses etc.
oh just 1 more thing i had on a focus tdci, under the passenger footwell theirs the fuse box with wire multiplugs, a pasenger caught his foon on a wire and unplugged it slightly, this took heater blower, windows, mirrors etc.
its worth having a general look around for any obvious wireing/electrical faults.
good look
mart