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Joe's ammeter problem could be due to several things. First, is the ammeter
sensing current from the alternator to the battery or from the battery to
the aircraft. In the first case the problem is in the current sensor or more
likely the sensor to DPU wiring. If the latter is the case then the problem
could also be in the alternator, likely the regulator or regulator to
alternator field wiring.

What are the particulars of the alternator and regulator? Where is the
sensor?

His oil temperature could be a sensor problem. The wiring could be flaky or
the sensor calibration could be off.

Recommended action:

 If you have any connectors, particularly the "Faston" spade crimp type,
replace them with soldered splices where possible. At the very least, solder
the faston to the wire. Check that the connections on the DPU are solid.

Check the calibration of the oil sensor by removing it and placing it in
boiling water or hot water with a known good thermometer. If you use boiling
water remember to correct for altitude.

Regards
Brent

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Please send your photos and drawings to marvkaye@olsusa.com.
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