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?