Subjects>Auto>Auto Parts

Can't get my new alternator to charge on my 1984 pickup 22R?

Anonymous

∙ 15y ago

Updated: 10/24/2022

Still Won't Charge After Installing a New Alternator

Usually this is an indication that the wiring system is "screwed up." Either it was that way before, leading to the need to replace the alternator, OR whoever changed the alternator screwed the wiring up during the replacement process.

You need a Professional to properly troubleshoot the system and make proper repairs.

Wiki User

∙ 15y ago

What else can I help you with?

Getting enough amps from the alternator but not enough to the battery?

depends on what way you are testing it but you either have a bad connection between the alternator and the battery or your battery is bad and cant hold the charge what voltage are you getting

How do you tell if the alternator or the battery is bad?

any auto parts store cant test both of those for free You can also test them yourself if you have a digital multi-meter. The battery will read 12.6 volts when fully charged. 12.4 at 75% charge, 12.2 at 50% charge, and 12.0 at 25% charge. With the engine at idle you should read from 13.5 to 15.5 volts at the battery if the alternator is good.

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The bearings on one of the pulley driven accessories on the engine are probably bad, or the belt is just loose and the alternator cant charge the battery. When the battery is very low on charge the alternator has to put a heavy load on the engine to produce power and a loose belt might not even turn it fast enough to generate any power.

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