Problem with 94 Supreme Tranny

Hi, i have a friend with a 94 Cutlass Supreme 24V DOHC 3.4, days ago, the car start feels like no power, the tranny was working rare, the speedometer drop to 0 and the SES Light come on, The OTC Scan tools says that is a Open circuit but no more info.. Maybe can be a bad sensor or disconnected wiring harness.

Help please


MoshimoGTP

what are your rmps doing when it cuts off and the power steering, does it go out?