Installation Instructions for GM 4L60E Transmission Harness

EPC (FORCE MOTOR) WHITE CONNECTOR PURPLE/BLUE WIRES

SHIFT SOLENOID A GREEN CONNECTOR RED/GREEN WIRES

SHIFT SOLENOID B GREEN CONNECTOR RED/YELLOW WIRES

1995-on PWM LOCK-UP BLUE CONNECTOR RED/BROWN WIRES

PRESSURE SWITCH WHITE FIVE-PIN CONNECTOR

BROWN/GRAY/PURPLE/ ORANGE/BLUE WIRES

1996-on 3/2 DOWNSHIFT GRAY CONNECTOR RED/WHITE WIRES

1993-1995 3/2 DOWNSHIFT BLUE CONNECTOR RED/WHITE WIRES

ON/OFF LOCK-UP RED/BLACK WIRES Harness # 350-0020 – Standard LU Sol

Harness # 350-0025 – Anti-Bleed LU Sol*

INSULATED COVER INSTALL ON ALL UNUSED

CONNECTORS AS ILLUSTRATED (SEE CAUTION NOTE)

www.rostra.com 1-800-782-3379

1. Remove old wire harness from valve body. 2. Install new Rostra wire harness.

Note: Bolt locations may differ from old harness. 3. Plug-in connectors as shown in figure below.

Note: Shift solenoid connectors might be white.

Form #4147, Rev. G, 12-03-10

CAUTION: Insert insulated cover(s) on unused connectors to prevent possible electrical short.

* The Rostra Anti-Bleed Lock-Up Solenoid prevents torque converter drain-back after engine shut-off. Torque converter drain-back can cause delayed gear engagement on initial vehicle startup. GM introduced the Anti-Bleed solenoid starting in MY 1995, however both Rostra Part #s 350-0020 and 350-0025 may be used in all 4L60Es from 1993-2002. For 2003 and newer models, use Rostra Part # 350-0061.