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Discussion Starter #1
I am about to install a Mallory Unilite in a
70 SS. The manual says I need to ensure there is a Ballast resistor or Loom Resistance Wire
between the Ignition Switch and the coil + terminal.
How can I determine if the above exists?
 

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The wire that your car had to the original coil positive terminal has "loom resistance" which is provided by a high resistance wire in the wiring harness.
 

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Check the voltage at the connector for the + dist connection. It should be about 8-9 volts. In 70 the stock resistance wire dropped the voltage to a safe working level. So if no one has changed the wire, you hould be OK.

------------------
Rick
72 El Camino
TPI350/700r4
TC#00038
ACES#00140
 

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The only way you will be able to check the voltage and see if the resistor is in place, is if current is flowing. Take a testlight, connect the aligator clip to ground. Touch the tip to the wire on the positive side of the coil. Check the voltage between the testlight tip and ground. If you have 9v the resistor is there. If you have battery volts, the resistor is not there.

HTH
 
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