Looked on cwd’s that came inside top cover and determined the intermediate switch may be the issue since the dish and lite are controlled by the same switch. Ordered a switch and new holder as I broke the holder removing the switch taking it apart. Parts cost me $27 with shipping and I got them in 2 days. The switch fixed the problem. The switch cost $13. Had I not broken the holder the repair would have cost around $15. I tried to order the switch from Whirlpool but they don't sell the parts to the public. AppliancePartsPros.com saved me a possible service call of a few $100 or a replacement unit for much more all for a simple micro switch that cost me around $15 to fix.
Just consider that for a moment. We are so glad to have our microwave back and the best part is we didn't have the expense of having to replace it.