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    oldwoody's Avatar
    oldwoody Posts: 1, Reputation: 1
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    #1

    Feb 25, 2010, 08:03 AM
    I have a 1990ndodge w-150,after the truck runs a while,the headlights start blinking
    When truck gets warm the headlights start blinking on and off what could cause this?also where is the headlight relay located for my 1990 dodgr w-150?
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
    Uber Member
    		  
    #2

    Feb 25, 2010, 08:18 AM

    Check your charging system:

    https://www.askmehelpdesk.com/cars-t...ml#post1973613

    There may be a problem with the alternator (worn brushes) or voltage regulator. I suspect that the alternator needs rebuilding or replacing. Disconnect the negative battery cable, prior to working on the charging system.
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