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No Charge with good alternator!
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Vinnysnismo
User
Nov 27, 2007, 11:07 PM
Post #1 of 1
(1493 views)
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No Charge with good alternator!
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Ok here is my problem. I'm working on a 1984 Toyota pickup with the fuel injected 22R engine. Its my neighbors truck and i have been asked to help him fix it. His battery kept dying and i told him it was the alternator(checked with a volt meter). He was getting less than 12v while running. I disconnected the battery cable and it died. we took out the alternator and had it benched tested, they said it was bad and he got a new one on warranty. We installed it and still less than 12v. I know quite a bit about mechanics but its electrical problems that stump me. I checked the power going into the alternator through the plug and there is constant power through all 3(about 10v) and it goes up to about 12v when the key is turned on. I checked the output of the alternator and it only read 2v.weird. I checked all the grounds and they are all good. We checked all the fuses(under the hood and inside the truck) and haven't found any that were bad. We changed the voltage regulator and that didn't help. I checked for power through the disconnected alternator wire and it had voltages consistent with the battery. I tried the magnetic test on the alternator(screwdriver on the back) and it wasn't magnetic when running(that means the alternator is not working right?) He replaced his battery and i made sure all his wires had a good connection(block,body,starter,etc.)We checked to make sure the belt was tight enough. Is it possible to have gotten a bad alternator or is our problem something more serious? I'm running out of ideas!!!! Help!!
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