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 Charging System Issues - Need Help
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| Author | Topic: Charging System Issues - Need Help |
CGD1985 Prowler Newbie From:Webster, NY USA |
posted 08-15-2019 12:21 PM
    
I've replaced my 1999's battery and alternator within the past year and still haven't figured out my issue. The voltage while idle fluctuates at 12.2/12.3, when revving the engine it can get up to high 12's. I have discounted the black alternator cable while running and the voltage does drop, and come back up when reconnected. Any help would be appreciated. I can't seem to figure out why the low voltage. This message has been edited by CGD1985 on 08-15-2019 at 12:22 PM |
Tony Goertz                    POA Site Supporter Administrating Kat Personal ScrapBook From:Lucan1, Ontario, Canada |
posted 08-15-2019 01:18 PM
Check the crimped end of the heavy power wire that connects to the alternator. I have seen a few that the connection goes bad. Look close as it is not easy to spot. |
401KAT POA Site Supporter Prowler Junkie From:dequincy, Louisiana, United States |
posted 08-15-2019 04:35 PM
Also you can go underhood with engine running...find good ground for a hookup to a digital meter(lowes has some for $30) and PROBE the connections from alternator with other lead..if connection is bad you will have a difference in reading from stud on alternator and further down on cable when you probe....Sometimes when you check these problems without alot of disturbance the problem becomes apparant... When you find it let us know...jim |
Tomcal POA Site Supporter Prowler Junkie From:Commack, NY, USA |
posted 08-16-2019 12:49 PM
Alternator voltage regulation is controlled by the PCM. |
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CGD1985 Prowler Newbie From:Webster, NY USA |
posted 08-22-2019 11:13 AM
quote: That's what I am worried about, but no codes. I currently have it at the dealership. They are saying the direct alternator output is fine. I should also note that occasionally while driving the air bag light comes on with the deck lid light, but both go away quickly. |
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Tomcal POA Site Supporter Prowler Junkie From:Commack, NY, USA |
posted 08-22-2019 11:26 AM
If it turns out to be PCM, then compare Dealer PCM repair costs with this company..... POA members have had good results from these folks. |
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