Transmission/Transfer Box Oil Temperature Warning Light

The transmission/transfer box oil temperature warning light is grounded by the automatic transmission oil temperature switch (X108) when the temperature of the transmission fluid exceeds 130°C (266°F). The warning light is also grounded by the transfer box oil temperature switch (X174) when the temperature of the transfer box fluid exceeds 145°C (293°F). The bulb check relay (K173) will illuminate the warning light when the vehicle is first started to test the bulb.