SoCal Jet Boats
Tech Talk => Jet Pumps => Topic started by: 77spectra on February 23, 2009, 06:21:34 AM
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Just wondering if anyone has any ideas. I just bought a 77 spectra 18. The voltmeter on the dash stays right at 12 volts when the boat is running. I checked it with my voltmeter at the batteries and 12 volts also. I also checked it at the alternator and it shows nothing. The wire that is conected to the alternator (bat) should show 12 volts, right. It shows nothing. That wire runs to a breaker switch and then to the wire block that says ALT. Is there anywhere I can look at a wiring diagram for this boat? I think the problem is with the wiring because the wire running to the alternator should be hot (12 volts) and it is not. Any ideas?
Thanks,
Keith
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did you check the breaker ???
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I think most systems run more like 14 volts don't they? Most alternators you can tell if they're charging, the back side in the center will be magnatized(sp?), or just run it to checker and have it tested. Just read your post again, and it reads zero???
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did you check the breaker ???
The guy I bought the boat from just replaced the breaker. How do I tell if it is bad?
Also, I just dropped the alternator off, He said it wasnt working right so I am having it rebuilt. Does anyone know if the breaker acts like a diode and stops current from traveling back to the alternator? I am trying to figure out why I have know reading on the wire that conects to the alt.
Thanks,
Keith
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my experiences, the battery should be right around 12 volts when the engine is off. when the engines running you should seeing between 12 and 14.5ish, depending on RPM's and load. if u are not getting above 12 with the engine are chances are your alternator is toast. if your below 12 with the engine off with a battery that is charged then your battery is toast(or u have lost 1 or more cells).
hope that helps
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Thanks for all of the help. I got it figuered out ;D
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So are you gonna tell us what the problem was or not :screwy:
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So are you gonna tell us what the problem was or not :screwy:
That was a hit and run. :mad:
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Not on purpose 8)
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So are you gonna tell us what the problem was or not :screwy:
Sure.. The ALT was hooked up wrong. The charge wire hooked through the breaker switch and then to a wire that was labeled ALT. That wire ran to the underside of the dash board and was not conected to anything. It looked like the wiring was not completeed after the ALT and gauges were switched. I ended up just running the charge wire to the battery side of the starter selinoid.
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Sure.. The ALT was hooked up wrong. The charge wire hooked through the breaker switch and then to a wire that was labeled ALT. That wire ran to the underside of the dash board and was not conected to anything. It looked like the wiring was not completeed after the ALT and gauges were switched. I ended up just running the charge wire to the battery side of the starter selinoid.
Sounds to me the boat used to have an ammeter... :sly: Good find bro ;)
GT
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Thanks, it wasnt all me Brian at Rex Marine helped out too. I am glad it is working now ;D