Peterbilt 520 intake heater relay location

Discussion in 'Waste Removal and Garbage Truck Driver Forum' started by barcelonaleo, Jun 18, 2023.

  1. barcelonaleo

    barcelonaleo Bobtail Member

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    Feb 22, 2023
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    Have been working on a Peterbilt 520 refuse truck with the cummins L9 360 engine and have had a active code for engine intake air heater 1 circuit. I'm trying to diagnosis it but i am having trouble locating the possible location of the relay and/or fuse that may come in these trucks. Because from my knowledge peterbilt and other brands all put them in different locations. Would anyone know where this relay be located?
     
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