ezl, c/d box, ignition module. Whatever you want to call the silver box on the l/h fender well. I've seen them quit and restart several times then die for good. There are also several relays in the r/h kickpanel including a OVP that can cause it to quit.
The fuel pump relay is behind the glove box and those will go feet up intermitently as well.
I've found running them until they die is the best was to nail a intermitent faulure without test equipment.
Project Smoker, '87 603 powered wagon
Hauler, 96 CTD can you say torque?
Toy 73 Cougar xr7 convertible
Acme Automotive Inc.