Like many other posts ... my gauges are dead. They do not move, reset or shake whatsoever. I've spent hours now using the Medallion Gauge Troubleshooting guide, replaced the MDC and the wiring harness, checked all grounds and continuity before the MDC and after the MDC, checked the continuity of my ignition switch ... all readings are normal. I've unplugged/reconnected every plug, plugged in each gauge one at a time on each connector, I've read through every forum, read through the Mercruiser shop manual ... and I'll I am is left clueless.
I'm convinced the problem lies in my engine compartment because I found mold growing everywhere when I summerized. Could the ECM be the culprit? Have I possibly missed something?