Hot Rod Forum : Hotrodders Bulletin Board

Hot Rod Forum : Hotrodders Bulletin Board (
-   Hotrodding Basics (
-   -   Alternator issue (

89silverado454 09-04-2015 02:56 AM

Alternator issue
1984 corvette crossfire 350

Alternator stopped charging the bat.
Checked voltage at back of alternator, shows 30 volts.. Not good.
Brand new alternator

What could cause this?

delawarebill 09-04-2015 06:52 AM

i'll assume u don't have a separate voltage reg then.. diodes can die giving wacko readings.. what was the voltage at the battery when all this was going on ??

89silverado454 09-04-2015 08:45 AM

so you think the alternator is bad.
hope I can find a new one, bought this one yesterday. tried 5 different parts stores and this was the only one I found in the state so far! :smash:

delawarebill 09-04-2015 10:14 AM

does it have a separate voltage reg ??? fire it up and measure the volts AT the battery. voltage at battery should be right around 14v. if reading 12v and u have a alt that has a built in reg then yes it's time to replace it.

89silverado454 09-04-2015 04:30 PM

I have no idea if this thing has a separate voltage regulator.
Tracked down a alternator in anchorage. Put it in the vet, checked the voltage at back of the alt this ones showing 54-55 volts.

89silverado454 09-04-2015 05:32 PM

Figured it out. Disconnected the bat wire from the alt, no power.
So either the wire is broke (unlikely) or a fusable link is toast (probably)

Used a jumper cable from the pos on the battery to the pos on the alt, 14.2-14.3 volts at the alt & battery.

delawarebill 09-04-2015 05:50 PM

perfect !!!!!!! that's the number i wanted.. u did good.. use a VOM meter to ck the wire and link.. see piece of cake...
now i just ask that u keep the snow up there.. that's gonna be harder..

89silverado454 09-04-2015 05:54 PM

I'll turn a wrench all day... But I absolutely hate wiring
Snow... I'm not ready! Iv only put about 20 miles on the vette sense I got it. Work out of town on a 2weeks on/2weeks off rotation. I probably only have about 4 weeks of time home to get this thing running good & enjoy it before I park it for the winter.

All times are GMT -6. The time now is 07:43 PM.

Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Copyright 1999 - 2012. All Rights Reserved.