Engine started earlier in the day. Then it wouldnt turn over at all. ONly a buzzing sound when turning key. Battery checked and full charge, Wondering if the starter could have a bad spot in it?
Engine wont turn over
- Thread starter danaher103
- Start date
North Idaho Wolfman
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While a bad spot on the starter, or more commonly a bad solenoid, might be the cause it's more likely a bad connection on one of the cables or safety switch not making good connection.
Remove both ends of both cables and clean.
Remove both ends of both cables and clean.
Are you referring to battery cables or starter cables? Both are tight. The safety switches have been removed.
If there is 12v on the starter while trying to crank then it is in the starter.
Otherwise it is one of the connections.
Ray
Otherwise it is one of the connections.
Ray
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I once had a battery cable corrode almost in two under the insulation. Same symptoms as yours. Changed the starter twice before I found it, I know dumb me. joe
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As Wolfman mentioned, clean both ends of both battery cables. Even if the battery cables don't look corroded they could still have a bad connection causing the problem.
Also, if you have used any kind of corrosion inhibitor on the cables in the past, a glaze can build up between the battery posts and the connectors. The connectors may look clean but that glaze would prevent a good battery connection and cause a battery to discharge over time.
Battery assumed good may not be the case. One of the most common failures is an internal break inside battery. Will show 12 volts but craps out as soon as a load is applied. Digital testers dont always catch this kind of failure. Best test is a carbon pile load tester. Or swap it for a known good battery. Clean and shiny where BOTH ends of BOTH cables connect. One bad end on one bad cable will bring the whole operation to a halt.
North Idaho Wolfman
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torch
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Do you have a volt meter? Even a cheap $5 one? Hold the leads directly on the battery terminals while an assistant attempts to crank the engine over. The voltage should drop 2-3 volts.
If it doesn't, then you have a bad cable connection, bad solenoid contacts or bad brushes in the starter motor. If you see more than 4 volts drop, then you likely have a dying battery with insufficient amperage or a shorted starter motor. Try boosting it with another vehicle or load-testing the battery at the local auto parts store.
Next, meter between the starter motor terminal and the battery + terminal and have the assistant try again. If you see more than 1v when cranking, then there is excessive resistance -- you have corroded cable connections or dirty solenoid contacts.
Finally, meter between the starter motor terminal and the battery -. If you have full battery voltage (or nearly so) then the starter motor brushes are not making contact. Try rapping the starter with a hammer, sometimes this vibrates the brushes into contact for one more start, which would confirm the diagnosis.
If it doesn't, then you have a bad cable connection, bad solenoid contacts or bad brushes in the starter motor. If you see more than 4 volts drop, then you likely have a dying battery with insufficient amperage or a shorted starter motor. Try boosting it with another vehicle or load-testing the battery at the local auto parts store.
Next, meter between the starter motor terminal and the battery + terminal and have the assistant try again. If you see more than 1v when cranking, then there is excessive resistance -- you have corroded cable connections or dirty solenoid contacts.
Finally, meter between the starter motor terminal and the battery -. If you have full battery voltage (or nearly so) then the starter motor brushes are not making contact. Try rapping the starter with a hammer, sometimes this vibrates the brushes into contact for one more start, which would confirm the diagnosis.