Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - sbc starter selonoid "r" wire Confusion
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Old 09-18-2005, 05:39 PM
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Doc here,

If you are reading 12 volts at the Ignition Input, and only 9 volts out the "S" or start position With nothing else connected<---Read) The switch is No good..A totally dead battery reads 11 volts and below usually around 10.5

If your reading it at the wire "Ends" you may have the wrong wire hooked up to the "S" at the solenoid, the "R" or "I" wire feeding back through an ignition resistor...

If the switch input also is not dropping to 9 volts, but remaining at 12 volts, then you have confirmed the switch is bad...

be sure the "s" and "r" or "I" wires are disconnected while you test (no load).

The system itself is so simple, only a few things can go wrong...



Here is your typical wire diagram..If the wires ar as advertised and go to those specific locations, and the ground is proven good..then it can only be the switch or a mis-wire..

We know the solenoid is good as it runs fine in "Jump" mode..

We do not know the status of the neutral safety switches, reading the thread, no one checked..but for right now lets skip those...because you say you are getting 4 to 9 volts from the key...in start.

Assuming the whole starter functions properly in start mode, "jumped" we can eliminate the starter..

The only other thing it could be is a bad switch..socking the current out across bad contacts...
Doc
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Last edited by docvette; 09-18-2005 at 06:12 PM. Reason: added info
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