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    Antique Charlie's Avatar
    Antique Charlie Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Jan 15, 2008, 08:51 AM
    Ford Truck Clutch Interlock Switch
    On a 1987 Ford F-150 standard shift truck the clutch interlock switch is apparently used to simply close the circuit for the starter switch when the clutch is fully depressed - in order to prevent starting without depressing the clutch.

    When it no longer works - i.e. : the starter will not work when the clutch is fully depressed -
    It's time to replace it... right?

    Is there a way to bypass it conveniently by simply installing a jumper from one connector to another to check out the function of the rest of the circuit?

    A. Charlie
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
    Uber Member
    		  
    #2

    Jan 15, 2008, 09:06 AM
    I would remove and check the continuity of the switch. The switch may also be out of adjustment. Try spraying the switch with WD-40, first.
    CaptainRich's Avatar
    CaptainRich Posts: 4,492, Reputation: 537
    Cars & Trucks Expert
    		  
    #3

    Jan 15, 2008, 03:37 PM
    The switch is likely worn or broken and is in need of replacment.

    Yes, the switch can be by-passed temporarily for diagnostic purposes only.

    But the by-pass needs to be removed as soon as the remainder of the starting circuit has been verified as functional.
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