My 88 1/2 Sammi just started having a strange electrical problem. At first it acted like the alternator was bad; running off the battery. I checked the alternator's output and found about 1 volt. So I replaced it and all seemed fine for a day or two. Then the problem happened again. I noticed, too, that when things weren't running right, if I turned on the headlights or the blower, the radio quit working. Turn off the lights or blower, radio came back on. Had the battery checked and found 3 weak cells, so bought new battery. All seemed fine even though the battery should not have caused the problem. Then today on the way to work, all seemed fine and then I switched on the heater blower and the radio quit. Turned blower off, radio came back on. Then the radio started going on and off, on and off, etc. Finally all dash warning lights came on and the engine stalled. Trying to start it was like having a near-dead battery; hardly would crank the engine. I had to push the Sammi to the curb. After a few more minutes, it cranked and started like nothing ever happened! I drove the last mile to work and all was fine. Any ideas??????????????