[moehoward]

Well, we don't really know the extent of damage to cars would be. We do know that there would be a distinct correlation between the amount of circuit boards, proximity to blast, and probable damage. The fewer circuit boards, the better. But without a doubt many, many vehicles would remain functional because of simply being parked in a somewhat shielded area.

Thanks for the link, I'll read it fully when I have more time. But after skimming it I'd direct you to Foreign Enemies and Traitors by our own Travis McGee. On top of being a great entertaining read, it contains IMHO an unfortunately accurate assessment of what would be going on after a sustained period without services.

[Blogatron]

An old welder told me that you have to remove the ground strap from the battery, in other words interrupt all of a vehicle’s circuitry, in order to do arc welding on it to prevent frying the alternator, regulator, or computer. Would a breaker switch for the ground cable protect you from an EMP jolt?