Removed the aftermarket security system (it has about 30 wires) and took the car on a 30 mile drive today and could not replicate the problem. Stopped 4 or 5 times to check the battery voltage with the engine running, and the resistance with the batt. disconnected.

No short, and the battery voltage stayed at about 13.

Not sure if the removal of the security stuff fixed it, or it was just an intermittent fluke that will pop up again. Will check the resistance to ground on the glo plug relay if it does. Those glo plugs are such a p.i.t.a. to change, hate to be burning them up while rolling.

Thanks again for all the ideas.

ed