N400YS Posted December 26, 2016 Report Posted December 26, 2016 (edited) Hi folks My auxiliary vacuum indicator is lighting on even the auxiliary pump is off. (M20J mse 1995 with an auxiliary vac pump in the rear). It happened after the aux pump was on during a long period of avionic test. Could you tell me where I can locate the aux vac relay in order to check it, I suspect that it sticks. Thanks a lot and I wish you all a nice year end. Olivier Edited December 26, 2016 by N400YS Quote
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