Posted by Bob on August 09, 2010 at 13:06:12 from (69.178.228.68):
In Reply to: Resistor Block posted by farmall706 on August 09, 2010 at 12:04:02:
If you are referring to the one used in the ignition system, it adds resistance to the primary circuit, limiting current to a level that's safe for the points and coil.
Also, it can be bypassed by a connection to a special terminal on the starter solenoid to give a hotter spark during cranking when the starter is pulling down the battery voltage.
The other option is to use a "true" 12 Volt coil which has more primary windings to accept the full battery voltage without excessive current draw.
These usually work pretty well, but DO prevent the use of the starting bypass circuit previously described.
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