As a starting point I recommend checking the integrity of the wire terminations including the battery cables, positive and ground for tightness. Please try to resist guessing and instead apply good troubleshooting technique and logic. With a good tester, trace where the power is good starting at the battery and follow the circuit downstream up to where the power is not good. The problem will be right there.
Based on your description I'll be interested to hear if the power is getting to - and through - the ignition switch.
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Neil
1977 Catalina 30
San Pedro, California
prior boats 1987 Westsail 32, 1970 Catalina 22
Had my hands in a few others
Last edited by ndutton; 11-30-2022 at 09:04 AM.
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