73-87 Chevy _ GMC Trucks > Electrical

Faulty starter

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bd:
If you measured 12.4 volt drops across the wiring, either the wiring is toast or you connected your meter incorrectly.  Did you take the measurements while cranking the engine?

ackland3:
Sorry no I measured 12.4 both while cranking and not and got 0 volts on body of starter

bd:
Referring to the diagram, below, where did you connect the meter leads when you measured the voltage drop between the battery positive post and the solenoid 3/8" B+ post while attempting to crank?

With the engine off connect your voltmeter between the battery's positive and negative posts.  What is the reading?

ackland3:
I think I found it! a break in the wire from the firewall to the starter s terminal.

Chevygold:
Hi there hope you're right, sounds as if the damaged wire was allowing some voltage through to make the solenoid click but not enough to pull it all the way in to engage the starter and make contact with the contacts inside to send 12v to spin the starter.
Graham

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