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Showing results for tags '231 davtron jpi'.
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Hi folks, Became the owner of a '85 231 last week. As is normally the case a couple of things got missed in the prebuy and I'm going through those now. My Davtron M303 reads voltage at 28.3V while my JPI indicates it at 12.1V. This is a 231 so it's a 12V system and battery so a read of 28.3V just shouldn't happen. So I figure: 1) The voltage read circuit is INOP (OAT looks fine), or 2) It is wired incorrectly somehow. As an electronics engineer I've learned that even though this might be minor, squawks like these often lead to bigger faults somewhere, so I'm keen to figure this out. I'm also not trusting the OAT (which is critical), if the unit is reading voltage that far off. I'm replacing my INOP clock with a Davtron M800, so if that panel is going to come off we might as well fix everything. Any input would be welcome!
