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Comments about BWD Voltage Regulator:
This was a simple fix for a problem that was just weird. My battery would some times go dead and was not charging and sometimes would charge. When testing the alternator first time around it showed good, and after several more checks it was good and bad. Took less than 15mins to replace.
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Q:WHAT IS THE DIFFERENCE BETWEEN P/N # R731 AND R731P VOLTAGE REGULATOR , PICTURE PARTS LOOK IDENTICAL EXCEPT IN PRICE .
A:The Voltage Regulator by BWD Fuel Injection Electronics - Part No. R731 have a riveted circuit board for long life and reliable performance. They also have a clear finish on the cover and base to resist corrosion build-up, for long life compared to the R731P. The image displayed on both the parts represents only the R731 and not the R731P. With respect to the other issues I would recommend that you check the alternator as well. As the battery is new in your 1988 Ford Aerostar 3.0, it should be an issue with the voltage regulator or the alternator. For any further assistance please feel free to call us at: 1-877-238-2623 or visit the nearest Advance Auto store and one of our representatives will gladly assist you with any questions or concerns you may have.
Q:does the factory tach come off of the alternator or off something other.
A:To help you in a better manner, Please be more specific on your query and we would be better able to assist you.
Q:how do u test the voltage regulator
A:You just need an accurate voltage meter. Connect the meter to the poles of the battery. Start the engine and avoid spinning her up, even not for a short moment. The reading of the meter now can be anything; a reading lower than 12.6 volt indicates a weak battery. Slowly increase the engine speed. The meter reading should increase too, but will get "catched" at an engine speed somewhere at 1000 rpm. From then on the reading will stay "locked". It should be 13.8V; 0.5V higher or lower is the limit of what is acceptable. A voltage too high is NOT good: it will ruin your battery and wear out bulbs and other equipment. A voltage regulator is good when the reading hardly reacts to change of engine speed or to adding power consumers like electric window heaters or main headlights.
Q:My system is charging and keeping my battery charged though my guage flickers and the head lights surge would this be the regulator.
A:I would suggest taking your vehicle to a certified mechanic for a proper diagnosis before buying and having parts installed that may not (solve/be) the problem.