Posted by clint s on September 08, 2014 at 14:31:45 from (67.242.45.169):
In Reply to: Hot Coil and voltage posted by John T on September 08, 2014 at 14:19:22:
John T said: (quoted from post at 14:19:22 09/08/14) "At battery 14.9"
[color=red]Yes 14.9 volts between positive and negative battery posts
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?????????
Yes when the tractor is running I have 14.9 volts at the small (negative??) post that runs from ignition switch to coil not running battery voltage is present
"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.
When the tractor is running there is 6.9 volts at the post on the distributor, when not running and points closed there is 0 plus or minus volts.
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.
12 volt coil no external resistor needed
If theres no load on an alternator its voltage can rise too high DO NOT DO THAT!!!!!!!!!!!
Thanks won't do that again😓😓😓
We need more info
John T
[color=red:25109c1b5a][/color:25109c1b5a][/color]
Trying to figure out if I do have increased voltage and if I do is it making my coil hotter than it should be.
This post was edited by clint s at 14:40:47 09/08/14.
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