There used to be a great download
on the C27 Association homepage under Tech. Since they "improved" that website, it's disappeared! It included the four page "disclaimer" from Seaward and Catalina that it was an upgrade, not a failure-waiting-to-happen replacement, plus the wiring diagrams and the instructions you'll get with the harness.I tried a Google on Catalina Wiring Harness Upgrade, but didn't get any hits. Wiring harness gets you to lots of truck 'sites.Maybe the C30 Association website has it. You should know that website like the back of your hand by now anyway.I have a zip file of the package, so give me your email if you'd like a copy. I'll be out until Sunday (sailing) but could get it to you by email.In any event, order the harness, the instructions that come with it are very good. If you still have an ammeter in your cockpit panel, you'll need to order the package with the new voltmeter, too.Stu