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Painless TBI Harness
This harness is designed for 1986-1993 4.3L, 5.0L, 5.7L, and 7.4L throttle body injection engines. These harnesses will not work with a '94 or '95 ECM and will not operate a 4L60E transmission. These engines were factory equipped in GM full-size trucks, vans, and SUV's, S-10/S-15 trucks & SUV's, Oldsmobile Bravadas, Chevy Astro vans, and Camaro/Firebird platforms. Harnesses do not include all the original connections for the original emissions but are available separately.
This harness also requires the following matching parts: ECM #1227747, #16121154, or #88999146, Calpack # 16060836, and a prom to match your engine. (4.3L) # 16082087, (5.0L) #16139492, (5.7L) #16139566, (7.4L) #16128359. This Prom does not control any transmission or torque converter functions
Note: This harness is stand alone and is not intended to replace the OEM engine wiring. Stand alone harnesses are intended to run the designated engine & transmission only, generally when swapped into another vehicle.
Harness Length: 4ft. Between Engine and ECM
Fuse Type: Blade
Firewall Passthrough: Grommet
Color Code Based: 1990 GM Truck
Circuit Designations: Printed Wire Tags on all Connectors and Open Ended Wires
Connections Included:
All connections for fuel injection operation: ECM, MAP, O2, TPS, ESC, IAT, CTS, Knock, Injectors, Distributor, OBD1 w/ SES light, VSS and TCC solenoid.
Includes Connections for the Following Components:
- AC Power
- Brake Switch
- Data Link Connector
- Distributor
- ECM
- EGR Valve
- Electronic Spark Control Module
- Engine Coolant Temperature
- Fuel Pump
- Fuel Pump Relay
- Fused System Power
- Grounds
- Idle Air Control
- Ignition Switch Signal (Fused)
- Ignition Timing Settings
- Injectors
- Knock Sensor
- Malfunction Indicator Lamp
- MAP Sensor
- O2 Sensor
- Oil Pressure
- Park /Neutral Indicator Switch
- Starter
- Throttle Position Sensor
- Torque Converter Clutch
- VSS
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