Circuit Description
WARNING: This page is about a different car, the 2007 Isuzu i-370, 2007 GMC Canyon, and 2007 Chevrolet Colorado. However, it is still accessible from the selected car via links, so may be relevant.
The Isuzu T150 transfer case contains a neutral switch, which is supplied battery voltage by the transfer case shift control module. When the transfer case mode selection is in neutral the neutral switch provides a path to ground pulling the neutral signal circuit low. This assists the transfer case shift control module in determining the present mode. A fault in the 2WD/4WD signal circuit, or the neutral switch signal circuit will cause the neutral mode indicator to flash. A fault in the front axle actuator or the corresponding front axle actuator circuits can also cause the neutral mode indicator to flash.