Page 1 of 1

Model 1121 - Field voltage with switch off

PostPosted: Wed Mar 28, 2012 6:29 pm
by Guenter
After being laid up for a number of years, I took my alternator off for cleaning and checking. I reinstalled it and connected the wiring. Later, I noticed that I was drawing 1.3A with everything off on the boat. Checking further, I found field voltage of 10.87V (switch off) and 11.82V (switch on), battery voltage 12.89V. Disconnecting field wire stopped the current draw.

The article "Getting Trouble Shooting Assistance" states that "With the ignition switch off, there should be little voltage at the field terminal .... a few millivolts." Is this repairable?

Re: Model 1121 - Field voltage with switch off

PostPosted: Thu Mar 29, 2012 9:17 am
by Coulomb
It may be repairable, but it was made in the1980's, so some parts may be obsolete.

Now might be a good time to upgrade to the SAR V3. There is a trade-in allowance for your old regulator.

Re: Model 1121 - Field voltage with switch off

PostPosted: Thu Mar 29, 2012 10:30 am
by Guenter
Aside from the cost, how much will I have to modify the present set-up. I have the full package with ACS1008, battery temp sensors, 160A alternator 1060 and Bank Manager II #2004?

Re: Model 1121 - Field voltage with switch off

PostPosted: Tue Apr 03, 2012 12:37 pm
by Coulomb
You can re-use the regulator/alternator wiring, just hook up to the new regulator per the drawing.