[Towncar]

I've read the main Electrical Distribution box, under the hood has 3 or 4 relays (about $4.00 each) that can cause these type of problems until they eventually fail completely.

I've heeded the warnings, and through everyone's advice, I too carry several of these relays as spares.

Since these relays go bad unpredictabally, they can die out in the middle of nowhere, or after hours leaving you completely stranded.

Very simple to install, just open the Electrical Distribution box under the hood, mine's on the fender, you'll see the relays, their functions are listed there on the box cover, they are also interchangable so you can move them from one position (function) to another as a diagnosis to see is moving one fixes one problem, and creates another.