My 98 Expedition has recently developed the nasty habit of having a total electrical shutdown ( ie: driving along then dash guages stop working and all electrical systems systematically shutdown then engine quits). It has happened 2 times now - both days it was cold (-15C) . On both occasions if you took out the keys and let it sit for awhile it would behave normally again. New battery,new alternator - so power supply isn't the issue. Any insights would be welcome..

 

have the battery ground / Neg cable , checked where it hooks to the block , frame of the vechile,

Also Ive had the cables be loose where the cable end is attached