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starter solenoid issues


garth mc garth
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whilst changing a battery lead on the mog the other day the cap on the starter solenoid split in 2 around the terminal pole. i replaced it with another solenoid exactly the same dimensions, voltage etc but with a different part number but told was a compatible part.

now when i connect the battery terminal the starter engages on its own?? :cursing: i tried it with ignition wire disconnected and it still does it???? any ideas?

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its 2 main poles. 1st is the motor supply and the 2nd is the battery positive lead which also has the alternator output wire on and finally it has a small screw terminal at the side which the ignition wire connects to.

been checking through wiring diagrams and all i have done is correct, starting was never an issue with old solenoid but this has me baffled, i thought perhaps the contacts could be stuck inside the solenoid but if the ignition wire is disconnected then surely it wouldnt engage

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the terminals have different sized poles so will only fit the leads and wiring one way unless you took a drill to them and reamed the ring connectors out, i dont remember doing this so i decided to pull the guts out the new solenoid tonight and found the so called "new" solenoid was rusty inside and the terminals had stuck in the engaged position.

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