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valleybusman
Top Member

USA
814 Posts
Posted - 12/16/2022 :  10:47:42 AM  Show Profile  Send valleybusman an AOL message  Reply with Quote
I have a 2018 All American with DEF heater issues. Can't detect any heater 3525 I believe. Are there any easy items it might be stopping it from working? I contacted a guy at the dealership and he had me check resistance at the diodes which I did. They checked out fine along with resistance.

1Dieselman
Active Member

28 Posts
Posted - 01/04/2023 :  09:50:02 AM  Show Profile  Visit 1Dieselman's Homepage  Reply with Quote
Check relays and I have seen several melt the wiring near the head unit
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