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Message: <blockquote data-quote="ORVietVet" data-source="post: 26125" data-attributes="member: 9438">You are gonna want to use a big enough gauge wire for this testing. not an 18 gauge but closer to a 10 gauge. The smaller the wire the more resistance to the current flow.You want to see at least 12 volts to the starter and any more than that is best. Then you also want to know the voltage drop in the battery feed to the starter. Get a voltage at the battery/cable connection. Then check to see what the voltage is at the cable end at the starter. This is while you are not trying to start. Then see what voltage reading you have at the battery again, while attempting to crank and then see what voltage is reaching the solenoid when attempting to crank engine. What amount of corrosion is there at the cable at the battery and inside the insulation?</blockquote>