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a-marshal Samba Member
Joined: March 21, 2009 Posts: 270 Location: Toronto
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Posted: Mon Jul 17, 2017 3:15 pm Post subject: I think my Alternator wants to drive me crazy.. |
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A couple weeks ago as we tried to leave the cottage the generator light on our Westy refused to light. I cleaned the contacts on the starter motor and on the battery terminals and tried again.. it worked fine.. drove home. The next morning it would not light..checked a bunch over the week and it would light maybe 10% of the time (usually first thing in the morning). Next step was to replace the voltage regulator, so bought and installed one something like 10 days ago.. all seems well and light comes on every time I check, until today No light...
For whatever it may be worth the Battery is a 3 year old Optima Red Top and starts like a dream. When the light comes on it charges fine, without the light obviously nothing...
Before I go and invest in a new alternator is there something else I should look at?
If I have to replace the alternator is there any good guide to doing it with the engine still in the vehicle? I've got nowhere to drop the engine. _________________ -Ob. vehicle info....
1973 Westy w/ '74 1.8 liter / PDSI (type3?) carbs / 009 distributor / pertronix |
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Wasted youth Samba Member
Joined: July 06, 2012 Posts: 5134 Location: California's Hot and Smoggy Central Valley
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Posted: Mon Jul 17, 2017 5:42 pm Post subject: Re: I think my Alternator wants to drive me crazy.. |
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Check your transmission ground strap and negative battery connection on body. |
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a-marshal Samba Member
Joined: March 21, 2009 Posts: 270 Location: Toronto
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Posted: Mon Jul 17, 2017 6:14 pm Post subject: Re: I think my Alternator wants to drive me crazy.. |
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Wasted youth wrote: |
Check your transmission ground strap and negative battery connection on body. |
They appear to be good, tomorrow morning I'll try a jumper cable from the negative terminal to the engine case just to make sure. _________________ -Ob. vehicle info....
1973 Westy w/ '74 1.8 liter / PDSI (type3?) carbs / 009 distributor / pertronix |
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TDCTDI Samba Advocatus Diaboli
Joined: August 31, 2013 Posts: 12860 Location: North Carolina
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Posted: Mon Jul 17, 2017 9:18 pm Post subject: Re: I think my Alternator wants to drive me crazy.. |
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Broken filiment in the bulb making intermittent contact? _________________ Everybody born before 1975 has a story, good, bad, or indifferent, about a VW.
GOFUNDYOURSELF, quit asking everyone to do it for you!
An air cooled VW will make you a hoarder.
Do something, anything, to your project every day, and you will eventually complete it. |
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telford dorr Samba Member
Joined: March 11, 2009 Posts: 3555 Location: San Diego (Encinitas)
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Posted: Tue Jul 18, 2017 12:15 am Post subject: Re: I think my Alternator wants to drive me crazy.. |
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Disconnect the blue wire at the regulator and ground it. Turn the key on. The GEN light should be lit. If it isn't check the GEN bulb and holder, and the 12 volt feeder to the GEN light mounting plate. _________________ '71 panel, now with FI
'Experience' is the ability to recognize a mistake when you're making it again - Franklin P. Jones
In theory, theory works in practice; in practice, it doesn't - William T. Harbaugh
When you're dead, you don't know you're dead. The pain is only felt by others.
Same thing happens when you're stupid. - Philippe Geluck
More VW electrical at http://telforddorr.com/ (available 9am to 9pm PST) |
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a-marshal Samba Member
Joined: March 21, 2009 Posts: 270 Location: Toronto
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Posted: Tue Jul 18, 2017 6:22 am Post subject: Re: I think my Alternator wants to drive me crazy.. |
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Well this morning it lights every time*.. so if I am understanding things correctly the next time it refuses to light I'll perform Telford's test bellow..
telford dorr wrote: |
Disconnect the blue wire at the regulator and ground it. Turn the key on. The GEN light should be lit. If it isn't check the GEN bulb and holder, and the 12 volt feeder to the GEN light mounting plate. |
if the light stays out then the problem is likely in the bulb, socket or connection in the dash, if however the light goes on at that point I would have to look at the problem being inside the alternator..
*(I]m not going to suggest that the timing to these failures seems to be when it is the most inconvenient but it seems like if I have a bunch of time to work on things the light works perfectly...) _________________ -Ob. vehicle info....
1973 Westy w/ '74 1.8 liter / PDSI (type3?) carbs / 009 distributor / pertronix |
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telford dorr Samba Member
Joined: March 11, 2009 Posts: 3555 Location: San Diego (Encinitas)
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Posted: Tue Jul 18, 2017 10:28 am Post subject: Re: I think my Alternator wants to drive me crazy.. |
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a-marshal wrote: |
I]m not going to suggest that the timing to these failures seems to be when it is the most inconvenient but it seems like if I have a bunch of time to work on things the light works perfectly... |
But isn't that the way things always are??? _________________ '71 panel, now with FI
'Experience' is the ability to recognize a mistake when you're making it again - Franklin P. Jones
In theory, theory works in practice; in practice, it doesn't - William T. Harbaugh
When you're dead, you don't know you're dead. The pain is only felt by others.
Same thing happens when you're stupid. - Philippe Geluck
More VW electrical at http://telforddorr.com/ (available 9am to 9pm PST) |
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