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Old 01-16-2012, 04:16 PM   #1
jgh
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shore power and engine

Can you run engine while hooked to shore power or will it short electrical system. Not sure what happened. I cleaned cac with gunk, hosed it down. I had shore power hooked up for 110 lights. when I started engine volt meter went dead, tach isn't woking and speedo reads 35 miles per hr. Shut engine off disconected shore power everything is still screwed up. when I turn key off all guages have little bounce. I unhooked the batteries while I look for answers. 1999 discovery 37v
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Old 01-16-2012, 04:19 PM   #2
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Can you run engine while hooked to shore power or will it short electrical system. Not sure what happened. I cleaned cac with gunk, hosed it down. I had shore power hooked up for 110 lights. when I started engine volt meter went dead, tach isn't woking and speedo reads 35 miles per hr. Shut engine off disconected shore power everything is still screwed up. when I turn key off all guages have little bounce. I unhooked the batteries while I look for answers.
I have run my engine on my DP while hooked to shore power with no problems.
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Old 01-16-2012, 04:28 PM   #3
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I've never had a problem running my engine while hooked up either. If anything would blow while doing that I would think it might be the transfer switch (BIRD) but your symptoms don't sound like that is the issue.

Good luck and keep us posted.

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Old 01-16-2012, 04:31 PM   #4
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Sounds to me likem you got the engine alternator good and wet when you hosed down the CAC. The speedo on most DP's is run off of the alternator. Assuming you are talking about the volt meter on the dash. All symptoms point to a wet alternator.
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Old 01-16-2012, 04:35 PM   #5
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alternator

had it covered with plastic bag, maybe not good enough. yes I was talking about in dash volt meter, new 3 days ago.
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Old 01-16-2012, 04:47 PM   #6
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Not a problem on mine. Would be no different than running generator while driving.
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Old 01-17-2012, 02:09 PM   #7
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OK

let batteries disconnected over night, blew off everything in engine compartment, including alternator then hooked up batteries. Looks like everything is working now. Guess I was lucky this tiime.
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Old 01-17-2012, 02:17 PM   #8
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Sounds like water
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Old 01-20-2012, 07:18 PM   #9
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Quote:
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I've never had a problem running my engine while hooked up either. If anything would blow while doing that I would think it might be the transfer switch (BIRD) but your symptoms don't sound like that is the issue.

Good luck and keep us posted.

Rick
Since when is the Transfer Switch and teh BIRD, the same thing. They are not related in the least.
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Old 01-20-2012, 07:45 PM   #10
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Since when is the Transfer Switch and teh BIRD, the same thing. They are not related in the least.
I guess my ignorance has shown through. I thought the solenoid which controlled the selection of AC power source was called a transfer switch (and in some cases BIRD) but clearly I was wrong. I defer to your superior knowledge.

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Old 01-20-2012, 07:46 PM   #11
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let batteries disconnected over night, blew off everything in engine compartment, including alternator then hooked up batteries. Looks like everything is working now. Guess I was lucky this tiime.
Glad it worked out for you. Thanks for letting us know how you 'fixed it' - it may come in handy some day.
As a guess as to why - I don't recall the details, but a generator (and alternator) generates an electric field around the area of the windings. Just a guess but I think water may have got to it and shorted it out. When you disconnected all power sources overnight everything went back to 'zero' or any residual electric fields died. Then when you hooked up/restarted it, all was re-established just as when you installing a new alternator. Of course this may be all BS and who cares as long as it keeps working - It was a very long time ago that I studied basic electronics and there were no such things as alternators back then.
Thanks again for sharing the information.
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