Join Date: Apr 2006
Thanked 170 Times in 167 Posts
Rep Power: 12
Re: Electrical Mystery. Need help.
"since the PO bought the boat"
I'd agree with checking the wiring first. Check battery voltage, and using a known good voltmeter, compare that battery voltage to the voltage available AT each instrument and at the breaker panel.
I suspect that you are going to find the voltage is OK, even if the wiring could use some cleanup. And what this is going to be, is a bad capacitor IN one of the instruments, that is leaky and "eating" the initial charge from the circuit, so that instead of that capacitor charging up in a second or less, it is taking ten seconds to charge up and actiung something like a dead short, pulling the voltage down to nothing, until it has charged up.
The way to confirm that is to disconnect half the instruments, power up, see if the rest come up normally. If they don't come up normally, disconnect half of what's left, see what comes up normally. Repeat and swap (these on, those off, vice versa) until you pinpoint the one bad instrument.
You could do that one at a time--but cutting things in half usually makes the process faster overall. Either way works.
If you DO find that disconnecting one particular instrument solves the problem, either send that one out for repair, or open it up and look for an electrolytic capacitor that is swollen or leaking. That's often a simple eyeball job.
Seatalk: You know the best thing about cheap cellphones? You can call Rayma-whoits tech support, right from the boat, and run some ideas past them. They may have some specific ideas, having met this exact problem before.