Firebird V8-305 5.0L VIN E TBI (1989)
Torque Converter Clutch Solenoid: Customer Interest
A/T - TCC Wiring Shorted to Ground, Blown Fuses
Bulletin Number:
89-7-47
Reference Number:
977140
Publish Date:
9/89
Subject:
POSSIBLE BLOWN VEHICLE FUSES ON CIRCUITS 420, 422 OR 446 DUE TO SHORTED TCC WIRING
Models
Affected:
1989 SAFARI WAGON AND FIREBIRD MODELS WITH 4L60, 700R4 OR 2004R
BULLETIN COVERS:
Service and parts information for transmission Torque Converter Clutch (TCC) solenoid wiring which may exhibit a breakdown in insulation. This loss
of insulation and possible short to ground may cause conditions affecting the vehicle's transmission, electrical system and engine performance. For
example, the short may cause blown fuses and/or conditions such as loss of air conditioning, ECM, instrument cluster, etc.
Due to electrical design differences, each vehicle line may display unique conditions. It is also possible to have different conditions exhibited by each
division's vehicle within a vehicle line. A short in the TCC circuit will usually blow a fuse on the circuit containing the TCC solenoid. To help determine
which fuse may affect an individual model, refer to the "Diagnosis Information" section of this bulletin.
IMPORTANT:
Diagnosis information in this bulletin is not contained in any Service Manual.
Figure 1 - Transmission Identification Information
DATE OF PRODUCTION CHANGE:
Changes to the TCC solenoid wiring entered production effective May 17, 1989 (Julian Date 137) on all 1989 700-R4/HYDRA-MATIC 4L60 and THM
200-4R transmissions.
