starter selonoid wiring issue
Thread Starter
Cruising
Joined: Jan 2013
Posts: 10
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starter selonoid wiring issue
My 73 shows no voltage at the purple wire to the s terminal. But cranks and starts. Car has auto trans and has been converted to HEI ignition. I discovered this when I attempted to wire my new electric radiator fans through the starter. Anyone out there have an idea on the problem.
Racer
Joined: Jul 2010
Posts: 283
Likes: 1
From: The Netherlands EUR
I know this is an old topic but can someone help me with the electrical diagram above, i have a question.
My '80 Vette would not start. When i turned the key the starter motor rotates but the engine would not turn over, so i thought about a defective starter pinion. I know the solenoid has a sort of "overtake" function build in so if the solenoid does not move the main electric contacts will not touch and the starter motor will not rotate, so it must have been something mechanical.
I removed the starter and disassembled it. Found the problem quickly, the small pin which connects the solenoid anchor to the lever was fallen out so this is why the pinion did not engage.
I have studied the connectors and the "R" connector only becomes "live" if the solenoid has pulled the anchor in and connecte the main circuit to the starter. But why is this R connector feeding the coil as seen on the diagram above??? If the engine starts up en you let go of the key the solenoid returnes and the R connector looses connectivity, so no power to the coils, or am i wrong?
Thanks for explaining, Rene
My '80 Vette would not start. When i turned the key the starter motor rotates but the engine would not turn over, so i thought about a defective starter pinion. I know the solenoid has a sort of "overtake" function build in so if the solenoid does not move the main electric contacts will not touch and the starter motor will not rotate, so it must have been something mechanical.
I removed the starter and disassembled it. Found the problem quickly, the small pin which connects the solenoid anchor to the lever was fallen out so this is why the pinion did not engage.
I have studied the connectors and the "R" connector only becomes "live" if the solenoid has pulled the anchor in and connecte the main circuit to the starter. But why is this R connector feeding the coil as seen on the diagram above??? If the engine starts up en you let go of the key the solenoid returnes and the R connector looses connectivity, so no power to the coils, or am i wrong?
Thanks for explaining, Rene
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It only applies 12 volts to the "R" terminal while it is starting. It bypasses the resistor that reduces current through the points in normal operation. That's where the 2nd wire on the + side of coil is coming from.
JIM
JIM
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Racer
Joined: Jul 2010
Posts: 283
Likes: 1
From: The Netherlands EUR
Excellent explanation, thanks!
Mechanically i think i can do a lot on my Vette, but regarding electrics i have only very basic knowledge and am trying to learn here.
Thanks guys,