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Originally Posted by ghilliard
50 views and only 1 reply...1 reply, I might add, which is totally irrevelant....NICE!
I know I'm a newby, so if I've done something wrong, please let me know. Otherwise I would appreciate some help. Thanks.
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Did you do a search?
Typically if your question has not been answered, there are probally a bunch of threads already started on this subject.
The switch is just a signal to the TCCM.
The New Venture Gear Model NV243 is electronically actuated. The vehicles equipped with this model have no transfer case selector lever. The operator selects 2HI, 4HI, or 4LO by pushing one of three switches mounted on the instrument panel. During normal driving the transfer case is in the 2HI mode. When the transfer case is in 2HI both the 4HI and the 4LO switch circuits are open, and both lights are OFF. When the four-wheel drive has been selected, the four-wheel drive indicator lamp on the switch turns on when the front axle has engaged. The lamp will blink while the front axle is engaging.
The TCCM performs the following functions:
- Receives input signals
- Processes the signal information
- Develops output signals
- Sends the output signal in order to control the shifting of the transfer case
The TCCM receives input signals from the following sources:
- The transfer case shift select buttons
- The NSBU switch on the vehicles with automatic transmissions
- The clutch position switch on the vehicles with manual transmissions
- The vehicle sped sensor calibrator module
- The encoder/motor range and the mode feedback signals
- The diagnostic enable
- The front axle mechanical status signal
In order to ensure the electronic shift system is operating properly, the transfer case control module (TCCM) continually performs diagnostics checks on itself and other parts of the electronic shift system when the ignition switch is in the run position.