switch manyfold wiring qiations

Good job. Let us know how it goes. Not sure on the normally open or closes state.

 

Well good luck with that, I to have real lousy grammar, and I really don't care what anyone thinks of my education, if they don't like it they don't have to read it. One more reason I drive instead of teach.

 

No, all the switches aren't the same state (NO or NC). One wire from every switch should be a ground wire (whether they'll say GND or 440G) so that should take care of half of them, haha. Knowing NO or NC is simple to figure out with a few moments and an ohm meter. I'm assuming you have the wiring info regarding wire numbers to switches, do you know the manifold layout well enough to determine what switch is what (service brake for ECM, brake light, park brake for ECM, park brake indicator for ICU, low air primary, low air secondary, etc)? I'm don't know the '99 off the top of my head but I'm very familiar w/the newer P2's and can find almost any piece of information (Daimler Trucks NA anyway).