cedgo, You can check the bridge with a simple meter, as it is only made up of diodes. If it is a full wave, there will be 4 hook up points in a square. One of the points will have a dot, flat spot, or other identifying mark, that the others do not have. The one with the mark will be the D/C +, the one in the opposite 45* corner will be the D/C -, the other two will be A/C inputs. All A/C power flows to the D/C + only. Any reverse reading an the bridge is defective. If it's static, you can replace it easily. If it's rotating you will have to dig deep an try to locate one that is about the same size, an mounting style. If you do a search on, Bridge rectifiers, you can find a suitable replacement most every time. Case in point Generac, they will tell you some parts are not serviceable or sold for repair ie, Automatic Transfer Switch, coil clearing contacts. They will sell you the hole mechanism, which is more money than a complete new switch. A customer had some fail on his 400amp ATS, I dug around an found the replacement micro switch's for 98 cents each. Customer total bill was $265.00 (travel, labor an parts)New replacement ATS installed at the site would have been, $4800.00. Some manufacturers, are only in the making an selling business, with planned obsolescence as their driving goal.
Last edited by KRE; 12-01-2011 at 08:45 AM.