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502 MPI Audio Warning Wiring

Old 07-19-2017, 04:57 PM
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Default 502 MPI Audio Warning Wiring

My 311 has Gen VI 502 MPI's, and I'd like to get the audio warning systems working so that they can give warnings for oil pressure/engine temperature/trans temperature faults as well as ECM faults.

At the moment only the original HP420 alarm is hooked up (old style buzzer hooked to tan/blue sensor wiring). It is working properly.

In the MPI wiring diagrams, I see that there are connections from the ECM that should be hooked to a buzzer (tan/blue to buzzer for coolant over-temp and low oil pressure/low gear lube, and a blue/tan to audio warning switches again for low oil pressure/gear lube/trans temp).

How do you hook this all up? Has anyone done this?
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