I have an EP16KT s/n ETB4B01613 that has a code 33. Conditions: key on, seat switch closed, left and right drive function normally. Steering pump motor functions normally. If any hydraulic lever is actuated, line contactor will open and a code 33 is set. I removed one cable from hyd motor to simulate open motor circuit and when hyd lever was actuated still set code 33. I pulled head cap and buss assembly and took T1P and D1P out of circuit. I tested both and both tested bad. I also tested pump motor for short to case and resistance as compared to a known good motor. No short and resistance for both motors was around.07. (out of circuit) on my DMM. I installed new t1p transistor and d1p diode. Drive and sreering still functioning normally. Still sets code 33 if any hyd lever is actuated. I once again pulled motor cable
And actuated hyd lever. It set code 49 that time which i think is p motor open circuit. I pulled G and E wires off of new t1p and code 33 is set as soon as key switch is turned on. I did visual inspection and smell test of driver board no obvious damage and no burned smell. Ihave verified wiring continuity from t1p to driver board. I disconected cs3 conector and turned on key it set another code but not a 33. I don't remember the code. Battery voltage is good. And display indicates full charge. 36V lift by the way.
Where do I go from here?