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Re: Freightliner MT45 No Start
Posted to HD/Fleet Forum on 1/8/2020

I see a 20 amp fuse in the "fuse box" that supplies constant power on circuit 439C, which goes to a Power Distribution Unit. There is also a 5 amp fuse and relay that supplies key switch power on circuit 439A. Circuit 439A goes directly to the VCU but it also ... Login to read more.