I need some help with a lock cylinder

I just went through the same thing with my '88 Grand Caravan, and I sprayed some Chrysler MP-50 in the cylinder yesterday and it's been working fine so far. That's similar to WD-40. The only other thing I can suggest right now is to be sure you're using the right key. (That was the solution twice so far so don't roll your eyes).

I have to leave for an appointment right now but when I return I'll look up the lock cylinder that I think you have. Then I might be able of offer some better ideas. In the meantime someone else is likely to reply to your original post.

I left the dealership in '99 and I see you have a different version of the cylinder than what I'm familiar with. The site owners don't like me sending you to a different web site, but in this case I'm going to do it if it will help you solve this problem. They have a video on replacing the "ignition switch actuator pin". Unfortunately they don't say what the symptom or problem is that this fixes.

Do a search for rockauto. Com, then select your year and model. After you select your engine size, click on "ignition", then "Ignition Switch Actuator Pin". There's only one vendor listed. If you click on "More Info" it will open a new tab with a seven-minute video showing how to replace the assembly.

The alternative would be to order a copy of the service manual through the dealer or you can buy a subscription from one of the online service manual companies. Independent repair shops spend thousands of dollars per year for full access but you can buy just what you need for one vehicle for somewhere around 20 to 40 bucks for a year, as I recall. There's links on this site to Mitchell On Demand. All Data is another service. Basically both of them just use copies of the manufacturer's manuals so you'll get the same information and line drawings. I prefer paper manuals from Chrysler because I can stuff sticky notes and book marks in them and stuff is a lot easier to find than when it's on a computer.

I know that All Data also has recalls and service bulletins listed. Recalls are for safety, customer satisfaction, or emissions-related things that require attention. Service bulletins are simply for information on problems with elusive solutions. They are common enough that every mechanic will run into one eventually but the information is provided because it's silly to make every mechanic struggle with the same thing. If the problem you're having is common there may be an improved part available to prevent a repeat failure, or there could be a bulletin listing the cause of the problem you're having and the solution.