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JOHN
JOHN 1/20/2012
1988 Dodge D100 Custom 8Cyl5.2L - Engine
HEAD LIGHTS FADE IN AND OUT WHEN DRIVING
HAPPENS ALL THE TIME
3 Answers
  • mopar
    mopar 1/20/2012
    wiggle your head lamp switch..gets bright and dim?....replace switch
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  • rick
    rick 1/21/2012
    How old is your altanater ? The voltage regulater is built in and most likely going bad . When it kicks in and charges the lights are bright . Then it stops charging and everything is running on the battery only . So all the lights go dim . Sounds like time for a new one before dead on side of road . Take it off and most auto parts stores can check it for you for free . Make a call or two some can check it why still in your truck . That way you got something to drive to pick up a new one .
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  • mike
    mike 1/21/2012
    if your previous answers not helping check alternator belt for slippage or alternator itself. if under load (radio, blower , GPS ) could possibly be battery
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