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#1 |
3 lefts make a right
Join Date: Jun 2004
Location: Texas Hill Country
Posts: 150
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Alternater problem?
Hey y'all,
Seem to have a issue with my voltage. While driving my volt gauge is reading just over 13 (which is straight up). Just started yesterday - when I am stopped it drops down to just above the red - maybe slightly in the red. If I put it into park the volts go back up to normal. Any ideas?? A few months ago I put a new Optima battery in. If it is the alternater what do you all recomend - brand/amps? Thanks for any help. |
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#2 |
SlickSierra
Join Date: Aug 2005
Location: Keizer,Oregon
Posts: 142
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What size is in there right now? Im runnning a 70 amp with 2 high power amps and have no problem.
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#3 |
3 lefts make a right
Join Date: Jun 2004
Location: Texas Hill Country
Posts: 150
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I am not sure what is in there right now.
I dont have any extra's except a cd head unit. No extra stereo amps or anything. |
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#4 |
SlickSierra
Join Date: Aug 2005
Location: Keizer,Oregon
Posts: 142
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Get an Autolite 63 Amp that should work fine for you, they also come with a lifetime warranty.
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#5 |
Senior Member
Join Date: Jul 2003
Location: Indianapolis, IN
Posts: 1,277
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Check the voltage between the alternator output post and chassis ground at idle, it should be around 13-14v. If the voltage is low, the alternator is bad. Next check the voltage between the battery positive terminal and chassis ground at idle, it should be real close to the voltage measured at the alternator. If there is more than 1v difference, the cable is bad.
If the alternator is bad, I would replace it with a new replacement stock part. |
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#6 |
'87 V20 4x4
Join Date: Jun 2004
Location: South Western Ohio
Posts: 1,073
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easiest way to check to see if alternator is bad is to let truck idle then pull negative battery cable if truck dies then alternator is bad hope this helps Doc
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#7 |
3 lefts make a right
Join Date: Jun 2004
Location: Texas Hill Country
Posts: 150
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Thanks for the help everyone. I am going to try to find time today to check it out.
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