I replaced the head gasket on a 1996 E320 (M104 engine). I reconnected the wiring harness and now I have no ignition spark and no fuel injector pulse. What are the authority sensors necessary to get the electrons flowing properly in the PCM?

I think the bad wiring harness issue was fixed prior to 1996. I want to look at the signals from the authority sensors going to the PCM. If the inputs are good, I want to look at the outputs to the coils and injectors. My impression is that www.startekinfo.com is a reasonable source for wiring diagrams to assist in this process. Any insights into this problem would be apppreciated.