Lost oil pressure indication in flight.
Replaced Honeywell with new unit, same part #– still 0 lbs pressure indicated on the D120.
Removed and tested sender using bench pressure and got current on white wire varying with pressure (didn’t note exact values but it seemed to be behaving).
Continuity on red 12v (pin 15) wire checked from 37 pin head to connection at sender. 0 ohms resistance (good).
Measured 12v on same with switches on.
Resistance on white wire from pin 6 at 37 pin head to connection at sender is about 150 ohms.
----
So- sender testing OK; wiring testing OK.
Is there a chance that the D120 could have an internal failure for oil pressure only?
Is there a way I can test that (i.e. what voltage should I apply to pin 6 at run time to see any pressure reading > 0?
Thanks!
Replaced Honeywell with new unit, same part #– still 0 lbs pressure indicated on the D120.
Removed and tested sender using bench pressure and got current on white wire varying with pressure (didn’t note exact values but it seemed to be behaving).
Continuity on red 12v (pin 15) wire checked from 37 pin head to connection at sender. 0 ohms resistance (good).
Measured 12v on same with switches on.
Resistance on white wire from pin 6 at 37 pin head to connection at sender is about 150 ohms.
----
So- sender testing OK; wiring testing OK.
Is there a chance that the D120 could have an internal failure for oil pressure only?
Is there a way I can test that (i.e. what voltage should I apply to pin 6 at run time to see any pressure reading > 0?
Thanks!