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Originally Posted by ShinyC10
Thanks again for responding,
I took the alt to orielly's to have it tested but they didn't know how to test it. The alt is a 140a Summitracing brand and it has no part number on it so they didn't know how to run the test. he said that since it didn't come with the truck that the system wouldn't know how to test it. That's what he told me.
As for the diodes, I know they sell rebuild kits for alts but where would I get one for a 140amp? On another thread someone listed a link in their post but it was for like a 60 and 90 amp alt
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I'm not sure that Autozone or any of the other auto parts stores could test it and determine that it was bad. It should show up as overcharging or shorting with their equipment and the test is free so it might be worth the effort. Quoted myself
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Point, set, match.
How long have you had the alternator? Maybe you could get Summit to exchange it for you. If not you might find a shop in your area that rebuilds them. If it were me I think I would go with a CS 144, and wire in a resistor in the exciter wire. How much amperage do you need? 90 amps would be a good swap in test alternator, to see if the problem persists. Then if it runs OK, then you could upgrade to the CS or replace the summit 140 amp. Course if it's chromed then you have to have the bling.
Is that the one for $250?
Summit lists repair kits for powermaster 140 amp alternators.
https://www.summitracing.com/search?...0repair%20kits.
I did a little googling for you.
https://www.google.com/webhp?sourcei...,lf:1,lf_ui:10