Fiat Kobelco E135 Kept Killing Stop Solenoids: Alternator Ripple Was the Cause

See why a Fiat Kobelco E135 kept damaging stop solenoids until alternator ripple was measured and repaired.

See why a Fiat Kobelco E135 kept damaging stop solenoids until alternator ripple was measured and repaired.

Normal average charging voltage can hide an AC disturbance. Capture alternator ripple by waveform, load, rpm, and test point, then separate source, connection, battery, control, and local-circuit faults.