55 Resistor Question
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Tuned
Joined: Apr 2010
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55 Resistor Question
On my stock 6-volt positive ground system, the wire from my ignition switch goes directly to the coil; is this correct or should there be a resistor? Then again, the coil my have an internal resistor. I'm just not sure. Thanks. Steve
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does your distributor require a ballast resistor in line from ignition switch ---> coil? If your engine has been running fine, then no you do not require a resistor. otherwise your ignition module would've eventually destructed by now...
Also, check your starter solenoid, you may actually have a resistor bypass wire, running to the coil, meaning you'd also have a loom resistance wire from switch to coil. so no, probably not.
Also, check your starter solenoid, you may actually have a resistor bypass wire, running to the coil, meaning you'd also have a loom resistance wire from switch to coil. so no, probably not.
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From: NM
I don't think you can say whether one is needed or not unless you know what coil is in it. Some 6v Fords used resistors, trucks generally did not. But the chances it has an original coil are slim. If you aren't having problems, leave it alone.
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From: Rimrock AZ
Steve, if someone mistakenly installed a 3 volt coil (unlikely), the best course would be to install the correct 6 volt such as this one from NAPA. You will not need a resistor with a original or correct replacement coil.
NAPA AUTO PARTS
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Tuned
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Thanks however I do have a 6-volt coil that I purchased at Auto Zone. Cold starts are quick but sometimes it takes several engine rotations before firing-up when it is hot. The main reason I was asking about the resistor was that if there was a resistor in the circuit, I was thinking about running a bypass from the starter cable connection on the starter solenoid to the coil with a diode in between. This way the coil would be receiving a full 6 volts during warm start-ups and may improve quicker starts. Hopefully I'm making sense.
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Fleet Owner
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From: NM
I've heard of people doing that, but that ignores that diodes have a forward voltage drop of about 0.5 - 1.2 volts. Not much gain there.
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From: Rimrock AZ
Thanks however I do have a 6-volt coil that I purchased at Auto Zone. Cold starts are quick but sometimes it takes several engine rotations before firing-up when it is hot. The main reason I was asking about the resistor was that if there was a resistor in the circuit, I was thinking about running a bypass from the starter cable connection on the starter solenoid to the coil with a diode in between. This way the coil would be receiving a full 6 volts during warm start-ups and may improve quicker starts. Hopefully I'm making sense.
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