[Vwdiesel] charging issues
rgreeley2 at hotmail.com
Mon May 26 20:11:13 PDT 2008
I check voltage before start up, immediatly after start up and after it has run for say 10 min. when i do this on a second
vehical i get 14+ volts after start up. this makes sense. On the jetta I expect the alt to kick out 14+ after start up,I don't get more that pre start up (12+) battery voltage for the jetta. I don't think the jetta's battery is fully charged after start up and the alt has reduced it's charge as a result. this jetta has had a long history of charging issues, i thought when i found the starter to have a badly worn bearing this was going to change start up issues.
I have it wired from the alt to the battery, like many i have seen. with the engine running and the stator energized when i remove the cable to the battery
the connection does spark, when the cable is reattached it sparks and the engine slows and the alt squeeks alittle. the belt is snug, not over tightened or slipping. I am going to set up a second battery with ground and positive from the alt (on the jetta) and see what i get. I am missing something here and feel it is the wiring harness. ray> From: mark at shepher.fsnet.co.uk> To: Vwdiesel at vwfans.com; rgreeley2 at hotmail.com> Subject: Re: [Vwdiesel] charging issues> Date: Mon, 26 May 2008 23:00:52 +0100> > How long do you give your setup to raise the battery voltage? Remember you > may be pushing max amps through the battery in an effort to raise it's > voltage...> Mark> ----- Original Message ----- > From: "raymond greeley" <rgreeley2 at hotmail.com>> To: "Vwdiesel at vwfans.com" <vwdiesel at vwfans.com>> Sent: Monday, May 26, 2008 10:54 PM> Subject: [Vwdiesel] charging issues> > > > I found what i thought was a faulty alt, charging at approx12.5 volts +/-, > battery consistantly would be low. the car has been parked for the better > part of the year while i waited for time to fuss with it. Now that the > replacement 91 jetta lost a clutch I am back to noodling through the > charging issue. I swapped in a proven battery, an alt that puts out 14 + > volts on a homemade bench tester (spinning the alt with an elec motor and > giving the stator 12 volts ).> with this alt on the car it will put out 14 + volts until attach the wire > from the alt pos terminal to the battery upon which it drops the voltage to > battery> voltage, in my case 12.5 +/-. Is this typical and if not where might i look > for the culprit. Is there too much resistance in the cable from alt to > battery or incomplete grounding of the alt or something in the cars wiring > that is causing this issue. I am hoping for help here as i need to get this > issue resolved soon to have this car available for commuting. thanks, ray> _________________________________________________________________> Make every e-mail and IM count. Join the i’m Initiative from Microsoft.> http://im.live.com/Messenger/IM/Join/Default.aspx?source=EML_WL_ MakeCount> _______________________________________________> Vwdiesel mailing list> Vwdiesel at vwfans.com> http://www.audifans.com/mailman/listinfo/vwdiesel> > > > -- > No virus found in this incoming message.> Checked by AVG.> Version: 7.5.524 / Virus Database: 269.24.1/1468 - Release Date: 26/05/2008 > 15:23> > > > > -- > No virus found in this outgoing message.> Checked by AVG. > Version: 7.5.524 / Virus Database: 269.24.1/1468 - Release Date: 26/05/2008 15:23> >
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