Posted by John T on September 08, 2014 at 14:19:22 from (216.249.72.121):
In Reply to: Hot Coil and voltage posted by clint s on September 08, 2014 at 13:25:54:
"At battery 14.9"
That"s a bit on the high side, Id expect more like 14+ from an alternator at high RPM, but that"s almost 15 volts!!! Maybe a bad Voltage Regulator???
"At coil coming in from battery 14.9 volts"
It should be near battery voltage if the ignition switch is in good shape. This is for the coils small input terminal that is wired down from the ignition switch when its turned on, THAT WHAT YOU MEANT?????????
"From coil to distributor 6.9 volts"
If the points are closed (as they usually are when shes just sitting there not running) or if its an elec switch that is closed/conducting, the small coil output terminal that wires to distributor SHOULD READ NEAR ZERO VOLTS (to frame ground) as its effectively at ground potential via closed points.
If its a 6 volt coil and you have an external series voltage dropping (12 to 6) ballast resistor THAT ARE USUALLY WIRED BETWEEN IGN SWITCH AND COILS INPUT but you have it between coils output and distributor (wrong place), it would normally drop around 6 volts, but it should still be zero at the distributor if points are closed.
DO YOU HAVE A 6 OR 12 VOLT COIL??????? If you use a 6 volt on a 12 volt system and DO NOT use an external series ballast resistor the coil will get extremely hot (cant keep hand on it) and the points will burn up quickly.
If theres no load on an alternator its voltage can rise too high DO NOT DO THAT!!!!!!!!!!!
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