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Old 12-10-2013, 10:39 AM   #1
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1990 36' Land Yacht
San Antonio , Texas
Join Date: Nov 2013
Posts: 27
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Voltage Regulator and Oil Dipstick?

Greetings all,

Recently I discovered on my newly purchased 1990 Land Yacht that the battery cables (none of them) were properly tightened. This aided in or lead to the destruction of my alternator which I promptly replaced along with the battery cables/connections. Now the voltage reads as it should on the dash gauge and putting out 13+ volts at the alternator, and battery isolator. Rig starts right up but sputters which is an indication of a bad voltage regulator, however I am unable to locate said component. Can anyone provide any guidance? And if you would be so kind as to tell me where the oil dip stick is as well it would be greatly appreciated.

1990 Airstream Land Yacht
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Old 12-10-2013, 10:42 AM   #2
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2012 Interstate Coach
Metairie , Louisiana
Join Date: Dec 2011
Posts: 9,085
Voltage regulator should look something like this:

You can probably find it by starting at the positive battery terminal, and tracing the wire back toward the alternator. The regulator should be somewhere between the two.

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Engineering: Finding complex solutions to simple problems you didn't even know you had.
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Old 12-10-2013, 11:12 AM   #3
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1990 36' Land Yacht
San Antonio , Texas
Join Date: Nov 2013
Posts: 27
Images: 1

Thanks for the quick response. The positive cable is attached to a component that is used to connect the coach batteries to and then connects to what appears to be a starter relay (see attachment) I have been unable to locate any component to resembles the example you attached.
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1990 Airstream Land Yacht
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Old 12-10-2013, 12:02 PM   #4
Rivet Master
2005 19' Safari
Phoenix , Arizona
Join Date: Aug 2004
Posts: 2,358
A rough running engine could be caused by many things, and one of the last things I would suspect would be a voltage regulator.

If you just purchased this vehicle, I'd suspect fuel problems first, unless the engine was running smoothly just prior to the alternator problems or during your test drive.

If you have a Chevy 454 V8, check the link below to see if the symptoms sound familiar:

1990 Chevy 454 TBI (RV)
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Old 12-10-2013, 03:40 PM   #5
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1988 32' Excella
Robbinsville , New Jersey
Join Date: May 2012
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With many Chevy/GM engines the voltage regulator is built into the alternator.
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