With the key on the coil - and the wire connection at the points should both read battery voltage if the points are open and zero volts if the points are closed. Sounds like defective points to me.

Last edited by Bill Hanlon; 04/25/2025 2:34 AM.

'57 GMC 102, Original 347 V8, HydraMatic, 3.08 rear gear, added A/C, disk front brakes, HEI, AFB carb, '98 Honda Black Currant paint. T-boned and totaled 10/12
'52 GMC 152 Stake Bed, Original 228, SM420, added A/C, HEI, disk front brakes, '67 Chev 3.55 rear gear. Gets used as a real truck.