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Electrical 2nd Gen Dodge Ram Electrical Problems and Questions.


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  #1  
Old 10-30-2009, 11:09 AM
oh58pilot oh58pilot is offline
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Question Guage/charging/Electrical

Hello all. I'm new here and it looks like we have a lot of experienced folks here. Hope someone knows how to help me with my prob...Here it is:

First guage to go was the voltage meter..only when cold, and it would start working again when key turned off, then restarted. Started working again when weather was warm. When I was driving it yesterday in the freezing snow storm here in Denver, the volt meter again went to 0, with a corresponding "check guages" light, followed shortly by radio failure and a "air bag" light, which was then followed with all guages in cluster intermittantly going to zero, followed shortly thereafter with engine stoppage and dead battery. I jumped the battery, and it started...all guages working, then guages stopped working, and engine failure. I'm afraid to start it again, because it appears that the lift pump may be failing due to electrical failure, and I am concerned with the injector pump. I'm thinking loose connection at the cluster..?? Any ideas on where to start. My truck just turned 200,000, and Ive never had any problems with it except for valve body problems. New lift pump about a year ago (3000 mi).
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Old 10-30-2009, 11:17 AM
erm
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It may be an intermittent main electrical short somewhere. Check all main battery connections and grounds. Clean the terminals including the main positive lead to the starter.

Also check your alternator for output. It may have failed and you are under spec in available voltage.

Lastly, it may be a main board to the instrument cluster but I doubt that very much, seeings how the battery went dead.

How old was the battery, anyway?
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Old 10-30-2009, 11:33 AM
oh58pilot oh58pilot is offline
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Thanks Michael, two brand new batteries about a month ago, and a new starter. I checked connections at starter, and batteries.
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Old 10-30-2009, 11:40 AM
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Did you replace the cables? Sometimes they get corroded and start shorting, causing this problem. I still think there is a main electrical connection problem here. You said you think the injector pump is going bad. Is that electrically driven? If so, that may be the culprit causing the short.

And you're welcome! I'm sure there's someone else here who's run into this and hopefully they will chime in.
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Old 10-30-2009, 03:21 PM
oh58pilot oh58pilot is offline
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Actually, I didn't say the injector pump is going bad, it's just that I know when lift pumps fail, it's hard on the injector pumps. thanks for the tip. i'm thinking I'm going to start by having the alternator tested. Every thing seems to work fine after having a battery charger on the battery for an hour. I'll let you know what I find.
DM
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Old 10-30-2009, 03:30 PM
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OK, give that a try and let us know how it goes.
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Old 10-30-2009, 04:15 PM
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I am curious as too the outcome as well. As a mechanic myself it sounds like an alternator problem cuz all sorts of wierd stuff happens when battery voltage gets too low. The engine computer bases its commands on voltage and when it drops too much it gets incorrect info and then makes funny things happen.
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Old 10-30-2009, 04:29 PM
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Have heard of some dash failures here . Still may want to have the alternator checked . Just don't check that it is putting out voltage , make sure that is putting out the correct amount of amperage . I have seen cars putting out 14.0 volts but no amps . I had a fwd mopar that had 200,000 miles on it when I let it go . Still had the original stater and alternator . Impressive . Anyways if you have any questions let me know . Let us know how you make out . Tom
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Old 10-31-2009, 11:26 AM
oh58pilot oh58pilot is offline
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OK everyone. Thanks for all your input. I had the alternator checked and it did indeed have NO output. I replaced it and all seems to be back to normal. It is correct that the fuel control depends on voltage, and if there is not enough it will make all sorts or weird things happen and eventually shut the engine down. I think I am fixed. Thanks for the help.
DM
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Old 10-31-2009, 01:30 PM
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Great to hear .
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