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fuel pump relay issue

  1. Hum from Fuel Pump Relay

    Electrical & Computer Systems
    I have a 2001 Tundra SR5 with almost 300k!! its my baby. A quirky problem started recently I can not figure out. There is a hum or beep sound coming from the fuel pump relay. I replaced the relay thinking it was bad but the sound started up with the new relay. Any one know what could be...