Hi guys. I can add to this as I too have a '93 Dynasty. Did you turn on the ignition switch while something in the air bag circuit was disconnected? That would set a code that does not reset on its own like engine codes. To read and reset them, the connector is on the side of the module. I just looked at mine and can't see how to remove the center console but as I recall, that connector is on the right side. I can't tell from the line drawing in the service manual either but in that it appears to be on the back side closest to the passengers.
You'll need the Chrysler DRB2 scanner or the newer DRB3 with a plug-in card for older cars to access that computer and reset the light. (If you're near central Wisconsin, I have both). The cable is different than the square 6-pin cable under the hood for the engine. The air bag cable is a smaller 6-pin rectangular one. The same cable is used to access the Body, ABS, and Transmission Computers from a different connector. That one is blue and is clipped to the left side of the dash just a couple of inches from the "A" pillar above the parking brake pedal.
There really isn't much to these systems other than wiring and sensors. I can answer questions that aren't in the service manual. I've been to a number of Chrysler classes but there isn't enough information on this subject to fill an entire class so they just add it to other classes. The service manual I have is part number 81-270-3102. That covers Electrical, Fuel, and Emissions for '93 Front-Wheel-Drive cars. That's diagnostic and repair information only for those systems. For wiring diagrams you have to use the regular service manual. That is a set of three books. I have them too someplace still in the wrapper. You might still be able to get them through the dealer. You used to visit the parts department or the office girls for the trifold brochure listing the books that were still available, then you could order them directly. They would be shipped from the nearest training center. Haven't ordered any books for many years but for the last ones I did, they cost $90.00 for the set of one, two, or three books, and $53.00 if they were more than five years old. In addition, there are dozens of specialty service and diagnostic manuals that go into much greater depth. Those are for ABS, Air Bag, Transmission, Engine Performance, Body Communication, etc. With all of those service manuals and specialty books, we had about 300 books on the shelf to cover every system of every Chrysler model for a five year period.
You can find these books on eBay too. I've ordered a lot of books from a "lorieandjeff" out of Westmoreland, TN. I think they might be using a different name now. They will have thousands of service manuals and dealer's specialty tools listed. If you type in the part number in the advanced search box and check "title and description", four listings will come up.
If all you need is the wiring diagram for that one system, I think I can find the "Notes Page" I developed as a handout for my students. I can add the wire colors to it and post that. I also have the general description of system operation that explains how the system works and what it takes to set the various codes. It's rather basic but it's better than nothing.
Saturday, June 4th, 2011 AT 8:55 PM