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rjames |
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I'm made of metal ![]() ![]() ![]() ![]() Group: Members Posts: 3,996 Joined: 24-July 05 From: Shoreline, WA Member No.: 4,467 Region Association: Pacific Northwest ![]() ![]() |
I installed a brand new battery and a new voltage regulater last week in the car. My volt meter is showing 12.5 volts at the terminals. With the car running and the lights and fan on my volt meter fluctuates between 12.7 and 12.9, then slowly starts to dip, getting as low as 12.5 before I decided to shut the engine off because I could see that the battery was slowly draining.
Would it be logical that the alternator might need replacing? The alt. belt also seemed tight (not sure exactly how tight it should feel though.) I can check the electrical connections (have to find them first though.) The connections at the battery all look good though. It doesn't look like a fun job to replace the alternator, but I'm up for the challenge. Anything else I should look for before I go this route?? Thanks! PS: Forgot to add that the alternator light on the dash comes on when starting the car, but goes off right away once it's started and doesn't come back on at all when driving. |
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Dr. Roger |
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A bat out of hell. ![]() ![]() ![]() ![]() Group: Members Posts: 3,944 Joined: 31-January 05 From: Hercules, California Member No.: 3,533 Region Association: Northern California ![]() |
(IMG:http://www.toolweb.com/pics/LIS11120.jpg)
lead is shiny when clean, dull grey when oxidized and resisting conductivity. first things first. clean the battery cables with this handy little wire brush cleaner. then ensure you've good good ground from the batt to the body. Zero ohms resistance. charging systems sense low voltage. below a certain point the voltage regulator clicks "on" and charges until a max voltage is reached. usually 13.6 to 14.2V. the way i check a charging system is to load the battery on purpose by grounding the coil and turning over the engine for 5-7 seconds. this will ensure that the charging system will be "triggered" on when you start the engine. reconnect the coil, then hook-up you volt/ohm meter and start the car. you should see the charging system voltage rise to about 13.6V to 14.2V. the charging system naturally fluxuates.......... hope this helps. |
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