Question about 2001 Ford Super Duty F 450

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When battery is connected the starter engages

The key is off when we hook the battery up and the starter engages. we changed the cylnoid and the starter

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  • Anonymous Mar 15, 2014

    starter will engage when battery is hooked up

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You have 2 wires touching somewere.  Possable burnt together. Check the wires at the soleniod one is ground one is hot from the switch. remove the wires hook up battery with a 12vdc test light or volt/ohm meter ck for voltage on the wires. find the hot one and trace it thru the harness cut any ties or remove and coil like cover you should find the spot where it is burnt together or just rubbing. 

Posted on Jul 28, 2009

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Sounds like you've managed to hot wire your own car by cross wiring.

It's easily corrected but it requires you to go back under and disconnect the wiring and ensure you've connected the wiring to their proper connections.

It could be that you're allowing wiring to touch and it's leaving the starter powered / activated as soon as the battery is connected.

You're commended for disconnecting the battery before you worked with it. But I'd strongly suggest next time you also mark the wires and ensure they don't cross or touch when securing your work.

Posted on Jul 28, 2009

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