<VV> Fwd: Resistor Wire Question/answer
Sethracer at aol.com
Sethracer at aol.com
Sat Nov 5 20:14:35 EDT 2011
Bill - I will attempt an explanation. The coil need 12 volts while cranking
- trying to start - but only about 9 volts to run, once it is running. But
Chevy decided to save money and only run one wire to the "Hot" side of the
coil. What voltage feeds the other end of that wire is what sends either
12 volts or 9 volts from the system. The starter solenoid, when activated by
the ignition switch does three things. First, and most importantly, it
rams the gear on the end of the starter into the ring gear - That's the click
you hear - independent of the cranking - when the battery has just enough
juice to engage the starter, but not enough to crank the motor over. The
second thing the solenoid does is connect the thick lead from the battery to
the crank terminal on the starter motor, that is what turns the starter and
cranks the now engaged flywheel. The third thing the solenoid does is to
connect that same HD battery cable 12V power to the hot side of the ignition
coil. That wire to the coil's hot side comes from the terminal on the
starter feed terminal, on the left side of the engine compartment. It is easy to
spot, even inside the connector, because it also has a second wire crimped
to it. This second wire is the resistance wire that will supply the 9
volts, when the engine stops cranking. Since the solenoid is now deactivated,
the wire is now feeding the coil only this voltage, the 9V coming through
the resistance wire. The resistance wire, a braided fabric coated wire,
travels about half the way toward the coils location, makes a U-turn (inside the
harness) and comes out of the harness to plug into the engine harness
connector, where it feeds into main body harness.
So when the engine is running the, 12 Volts from the ignition switch
travels to the back of the car, through the resistance wire, to the crimped wire
on the starter connector, and up the copper wire there to the coil hot
side. While it is cranking, the solenoid feeds a full 12 Volts to that same
terminal, to give the coil a bit more juice.
Is that better Bill? - The resistance wire is mostly hidden from view,
wrapped up inside the engine harness.
Questions? - Seth
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