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If you have a bosch alternator, before you replace it, keep in mind, the brushes are usually what goes bad, you can purchse the voltage regulator, with the brushes for around $20 and change it with a screwdriver quicker than I can type this, after the alternator has been removed.
The good news is there is not much to the charging system. Alternator/with built in voltage regulator on most models. Battery, and associated cables. That's about it.
Check and re-check your connections. if they are good, and the alternator is good, assuming no undue voltage drains, it only leaves the battery.
Most auto parts stores will diagnose the system for free, but beware of the new kid on the job.
They will even bench test your alternator if you remove it and take it to them.
You should also check for some undue voltage drain.
A grounded wire in the harness will drive you bonkers, if it is an intemittant ground you will need therapy.
A bad battery will fool you also. It will start the car but not run the car, and it will sometimes cause such a load on the alternator that it can't run the car. But the battery will still charge with a battery charger and start the car, then just deteriorate as you drive.
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74 911 targa blk on blk, Carrera fend., tires & whls. gone, missed
85 325e bought new, totaled after 20 years & 465K miles, trouble free service.
01 Ford Ranger 4dr stpsd 4wd. I drive,here
88 325i convert. only 98k miles,gone, sold
93 325i.here, 98 Z-3 roadster. gone, 08 128 cabro gone
Last edited by coolbear1; 01-23-2010 at 08:57 PM..
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