What is it called?
CF Veteran
Joined: Nov 2011
Posts: 2,322
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From: Edmonton
Year: 1990
Model: Cherokee
Engine: 4.0
Originally Posted by 1991Jeep_Man
After more research though, I think mine is the vacuum switch. Appariently it's located on the t-case and supplies various directions of vacuum to control the shift fork. All so ignorant in design.
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CF Veteran
Joined: Oct 2009
Posts: 2,867
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From: Fauquier County, Virginia
Year: 1991
Model: Cherokee
Engine: I-6 4.0 HO
Ok... so wait. And please PLEASE forgive my running in circles... Im desperately trying to understand.
So my NP231 has BOTH switches, correct? One activates the vacuum motor for the CAD (the vacuum switch), and the other is the electronic one that simply illuminates the light?
So my NP231 has BOTH switches, correct? One activates the vacuum motor for the CAD (the vacuum switch), and the other is the electronic one that simply illuminates the light?
CF Veteran
Joined: Nov 2011
Posts: 2,322
Likes: 1
From: Edmonton
Year: 1990
Model: Cherokee
Engine: 4.0
The light comes on because of the vacuum present after you shift into 4hi or 4lo. If you know your CAD works, but don't have a light, just trace it.
Soon I will try to get rid of the CAD harness, and use maybe a 3way valve and new hoses to keep it vacuum operated, or do a homebrew posi-loc and just be done with it. Then I can have 2lo!
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