my 98 4.6 gems is driving me nuts with its intermittent fault of alarm fault ,engine disabled and jumping locks ,not locking or un locking on key fob some times it will except the eka after several attempts .I was wondering is it time to replace the drivers door lock/ micro switches ? its had new batteries in key fob and new one under the bonnet up graded the rf receiver and replaced passenger door look as it supper locked its self resoldered corroded wires on big white plug in passenger foot well. Any advice would be welcome.