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| twase |
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Just replaced an alternator on BA and at idle I am getting over 15V (15.3V) across the battery terminals. I was expecting around 13.8V is the new one a dud?
_________________ BF Fairmont Ghia Series II update. |
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| 79 raven |
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{USERNAME} wrote: Just replaced an alternator on BA and at idle I am getting over 15V (15.3V) across the battery terminals. I was expecting around 13.8V is the new one a dud? I thought it should be 14.4 not 13.8? |
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| snap0964 |
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Bit high I think Tony.
New or used alternator ?? What's the voltage when you put lights on ??
_________________ 96 XH Longreach 'S': LPG, Alarm, 3.23:1 LSD, Cruise, Trip Comp, ABS, Power Windows, Mid Series Dome Lt, Climate Ctrl |
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| twase |
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New, well its recoed but new everything except the case according to the ebay listing.
The terminal voltage is constant from idle to 3000rpm with the lights on or off. {DESCRIPTION}
_________________ BF Fairmont Ghia Series II update. |
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| snap0964 |
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Be wise to message the seller, IMO voltage is too high.
_________________ 96 XH Longreach 'S': LPG, Alarm, 3.23:1 LSD, Cruise, Trip Comp, ABS, Power Windows, Mid Series Dome Lt, Climate Ctrl |
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| twase |
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We agree, in my opinion it is too high as well. Today I got some new brushes and installed them in the old alternator, put it in and tested it and it runs 14.4V with a partially discharged battery , perfect except for the noisy bearings. With the packing that came with the new one it had the test results printout and it indicates 14.4V. I will give them a call tomorrow.
_________________ BF Fairmont Ghia Series II update. |
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| 66 coupe |
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ba alternators have a sense wire that links back to the battery, if the wire has a bad connection or is broken, the alternator can overcharge, best thing to do it disconnect the grey plug off the alternator and measure the voltage on the two pins with the key on, and compare with the battery voltage
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