I believe you both have diagnosed the problem! I took the car out last night and the circuits promptly dropped. I gave a slight wiggle to the key and they immediately came back up. They probably dropped a total of 5 times over the evening and each time the key movement corrected it.

I will proceed with the replacement of the switch. I did replace the keylock probably 3 years ago. Looks like there is a lot of documentation out there on the replacement of that part but I'm glad you verified that the electronic part can be done separately.

Also Eatont9999, this was very opportune that you posted. I've got my ************** kit to replace the injector nozzles and that is on the todo list. Your videos will be a big help.

Thank you both for the excellent guidance! I'll update once I have the ignition switch replaced.

Gib

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1983 300Dt 142K Miles

So where the hell was Biggles when you needed him last Saturday and where are all the sportsmen who always pulled you through?