The harness contains all TCU connections from the 8 Way Connector for most transmission combinations.
Products that can use this harness
Download this PDF version of the T03-P3 – TCU Harness Overview
T03-P3 – TCU Output Harness Drawing
· This old style Level 1 harness was part of the economy series for Mercury and some people still prefer them today to save on expenses. The harness contains all TCU connections from the 8 Way Connector for most transmission combinations.
·This harness was for a specific transmission like the A650E Aisin box. It has the negative driver diode board installed in the harness.
Design Points to take Notice of.
·This harness has 6 negative drivers used for 3x PWM Solenoids, 2x LED’s and 1 for other features.
· It has the Speed Output for speedometers.
· It has GP1 output for general purpose features.
· It contains the Lockup and Mode LED’s for user interfacing.
Wire Names and connections on this harness:
6x Negative outputs (Various Colours)
Speed Output (Green)
GP1 Output (Blue/Orange)
See the design drawing for thickness and lengths or wires. See the connection drawings in the specific product manual on how to connect the harness to each item it was designed for.
NB! Wires that are not connected must be isolated to prevent shorts or interference.