Posted by John T on November 13, 2009 at 07:23:03 from (66.244.97.31):
In Reply to: Farmall 340 - No Spark posted by John Ratu on November 12, 2009 at 19:50:30:
That drop from 6 down to 4 volts worries me. If the battery and cables and grounds and starter motor and solenoid are allllllll good Id expect more like at least 4.5 to 5.5 maybe (depends on battery n starter and temperture etc) . Id have the battery load tested and then remove, clean n wire brush n reattach each n every battery n starter n ground cable and try her.
Also check the ignition switch (burned resistive contacts), try to by pass the switch by hot wiring the coil and see what the coil voltage does then????
Then use my Troubleshootign Procedure below where you place a test lamp or voltmeter on the TO DISTRIBUTOR side of the coil and look for the lamp to flash on (poinst open) then dead off (points closed)
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