Thanks for the quick response and the photo. Where is this relay located I had read somewhere it is on an inner fender well ? I am going to replace the glow plugs anyway since I have them. Also going to rebuild the injectors and am not certain when the valves were last adjusted. My Dad had some declining health issues and is not too helpful as to when these were done. This car was meticulously maintained until 5-7 years ago and has been garage kept. It was his pride and joy and special gift he bought after retiring from the USMC after
31 years. I may pick your brain from time to time if that is okay. I noticed you live in central VA. Where ? I live in Ashburn near Dulles airport.
Alan

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92 500E Silver 66k
82 Porsche 911SC 84K
68 Cadillac ( Gone Now )
03 Suburban Z71 200K
85 300SD 217k From Original Owner ( Dad )