1-4 Upshift Indicator Light

1-4 Upshift Light Circuit Diagram:

DESCRIPTION
The One to Four light, located in the instrument panel, provides a display to the driver, which indicates the transmission should be shifted from first gear to fourth gear for maximum fuel economy.

OPERATION
When the PCM enables the 1-4 upshift system, the PCM provides a ground which turns "ON" the One to Four light. The One to Four light will remain on until the transmission is placed into fourth gear, vehicle speed is less than 12 mph or greater than 19 mph or the PCM disables the 1-4 upshift system.