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Home >> Isuzu >> 2007 >> i-290 LS, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 85 (Transfer Case - ISUZU T150) >> Diagnostic Information and Procedures >> Accessory Switch Transfer Case Mode Indicator Flashes in 4WD High or 4WD Low Mode >> Circuit Description

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 2WD/4WD switch, which is supplied battery voltage by the transfer case shift control module. When the transfer case mode selection is in either 4WD low or 4WD high the 2WD/4WD switch provides a path to ground, pulling the 2WD/4WD 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 4WD low or 4WD high mode indicators to flash. A fault in the front axle actuator or the corresponding front axle actuator circuits can also cause the 4WD low or 4WD high mode indicators to flash.

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