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International Automotive Technicians Network
Re: 2004 IHC 4300- NO LOW BEAM HEADLIGHTS
Posted to HD/Fleet Forum on 12/13/2005

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That's because there is no fuse or relay in this system. This multiplexed truck relies on the ESC (Electrical Systems Controller) to turn on and off the lights after it sees a request from the headlig... Login to read more.