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Old 03-04-2014, 02:55 PM   #1
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Question Green Lights. What are they?

I have 3208 T/As in my Camarque. On the dash there are two green square lights under the RPM gage. I was thing they were sych lights, but I have a sych gage.

What are these lights?
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Old 03-04-2014, 03:19 PM   #2
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Do they go on and off? If so, does the pattern seem to change as the engines are synced? They might be fast/slow engine indicators.
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Old 03-04-2014, 03:23 PM   #3
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Do they go on and off? If so, does the pattern change as the engines are synced? They might be fast/slow engine indicators.
Yeah, they come on, but not sure if they go off. Will have to monitor more closly. My guess is cheap sync lights, but my Cat manual doesn't address them.
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Old 03-04-2014, 06:45 PM   #4
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I would get behind the panel and see what they are hooked to. Sounds more like an engine "good" light if they are always on with the engine running. What happens when you start one engine? Does the light come on when the low oil pressure alarm clears?
Never heard of "cheap" sync lights. They would have to be driven by a synchronizer or a sync tach.
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Old 03-04-2014, 07:40 PM   #5
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breathalyzer?
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Old 03-04-2014, 07:54 PM   #6
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They may have nothing to do with Cat. They may well have been installed by the P.O

Yes, take a look in the manual.
Maybe there is a name somewhere.
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Old 03-04-2014, 09:34 PM   #7
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They indicate when the alternators are charging.
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Old 03-05-2014, 08:17 AM   #8
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Peter is spot on. I have them on my boat as well at both helms.
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Old 03-05-2014, 04:59 PM   #9
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I always thought that if the alternator was spinning, it was charging. Learned something new today, thanks.
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Old 03-05-2014, 05:03 PM   #10
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I always thought that if the alternator was spinning, it was charging. Learned something new today, thanks.
It can spin at lower RPMs without charging till the field is excited- as soon as the alt starts charging, the light comes on.
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Old 03-06-2014, 05:47 PM   #11
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Thanks Peter!! It was good meeting you at the boat show!
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