+- Tiara Yacht Owners Forum (https://www.tiaraownersclub.com/forum)
+-- Forum: Tiara Yachts Discussion Forum (https://www.tiaraownersclub.com/forum/forumdisplay.php?fid=6)
+--- Forum: Electrical (https://www.tiaraownersclub.com/forum/forumdisplay.php?fid=30)
+--- Thread: 1988 3300 Open - Voltage drop when lowering engine hatch or honking horn (/showthread.php?tid=9299)
1988 3300 Open - Voltage drop when lowering engine hatch or honking horn - Pluto - 03-18-2026
Hatch opens right up, but trips if I lower it for more that about 2 seconds at a time. I can see voltage drop down to like 4-6 volts when I try to lower it. The horn is the next switch over, voltage will drop to 4-6 volts if I honk it. Is there a common ground for the row of switches? Would it just be corrosion on a grownd connection? Why does the hatch not drop voltage when raised, but does when going down? I tried swapping the switch, that didn't change anything. Replaced the hatch motor as well, that didn't change anything.
RE: 1988 3300 Open - Voltage drop when lowering engine hatch or honking horn - Final Pursuit - 03-19-2026
What about other functions? Is it only the hatch down and the horn? If yes I would start checking grounds.
RE: 1988 3300 Open - Voltage drop when lowering engine hatch or honking horn - cp4000 - 03-20-2026
Mine has a remote deck switch behind the Starboard console. Does that one work ok?
RE: 1988 3300 Open - Voltage drop when lowering engine hatch or honking horn - hiccup - 03-24-2026
You say the voltage drops to 4-6V. Where and how are you measuring that voltage?
Obviously you have at least one very bad connection somewhere. The correct way to diagnose this is with a multimeter.