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 Freedo
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| posted on September 18th, 2012 at 08:40 PM |
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Alternator wiring
Have had an alternator installed as part of an engine upgrade in my '69 bus. The seemingly simple connection of wires is proving difficult despite
following instructions from some relevant sources.
It appears that a second red wire from the front side of the firewall was not connected to the regulator in the previous setup. Have now connected an
additional wire from the solenoid to the front of the alternator as outlined in some resources - but the warning light remains on and the battery
doesn't hold charge.
I am looking to head for an auto electrician but thought I may be missing something glaringly obvious. Any help would be appreciated.
Cheers,
Mark
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Klaus
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| posted on September 19th, 2012 at 04:14 PM |
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you can go either way , pos from batt to alt or pos from starter to alt , the wire that goes back into the loom to the front of the car orig from the
regulater goes to the black plastic part brush holder on alt as the batt light, unless you have an older external reg alt with 3 male spade fittings
on top and the alt/power wire fitting
if you cant work out which wire for batt light look at dash lights and take out bulb n holder to see what colour the wire is , think its solid blue
for batt , blue /green for oil , blue red for ind , blue /white for high beam
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Freedo
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| posted on September 19th, 2012 at 09:52 PM |
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Ta for that. Had a discussion today with another AVD member and checked out a few things he suggested.
1. Power to light on dash when ignition on - ceases when DF connection is removed - so all good there
2. 12 volts at D+ when connected to battery - doesn't seem to get much more when engine cranked, however.
Still cannot see a second red wire coming from the loom that should have previously been attached to the regulator. This seems to be a missing link
but cannot understand how it all would have worked before without it?
Need to call an expert to take a look me thinks.
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68AutoBug
A.k.a.: Lee Noonan
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| posted on September 20th, 2012 at 02:08 PM |
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| Quote: | Originally
posted by Freedo
Ta for that. Had a discussion today with another AVD member and checked out a few things he suggested.
1. Power to light on dash when ignition on - ceases when DF connection is removed - so all good there
2. 12 volts at D+ when connected to battery - doesn't seem to get much more when engine cranked, however.
Still cannot see a second red wire coming from the loom that should have previously been attached to the regulator. This seems to be a missing link
but cannot understand how it all would have worked before without it?
Need to call an expert to take a look me thinks.
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what Do You mean doesn't get any higher when engine is cranked??
when cranking You engine [turning it over] the voltage will go down as the starter motor draws a huge amount of power from the battery
when running, the alternator should be charging about 14 volts at least...
LEE
- [size=4]Helping keep Air Cooled VWs on the road - location: SCONE in the Upper Hunter Valley - Northern NSW 320 kms NNW of SYDNEY--- [/size]
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Freedo
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| posted on September 20th, 2012 at 02:53 PM |
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Meant 'running'
Cheers
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southspark
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| posted on September 20th, 2012 at 04:45 PM |
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Is your alternator internal or external regulator.Have a look how many terminals are on the alt & what letters are marked on them ,eg B+ Df
etc.
Paul
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68AutoBug
A.k.a.: Lee Noonan
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| posted on September 20th, 2012 at 05:52 PM |
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Is it an internal regulator alternator in which case it will only have two connections
B=battery
and the smaller terminal that goes to the dash lamp..
My Bosch alternator has the screw connection to the battery
and the push on terminal goes to the dash lamp
LEE
external regulator alternators have an external regulator..
with two or three connections plus battery terminal on the alternator and cannot use a generator regulator Lee
- [size=4]Helping keep Air Cooled VWs on the road - location: SCONE in the Upper Hunter Valley - Northern NSW 320 kms NNW of SYDNEY--- [/size]
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Freedo
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| posted on September 20th, 2012 at 09:25 PM |
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Thanks to all who have responded.
To clarify - internal regulator. A few more conversations today would suggest wiring OK. I am off to the local autoelec tomorrow for an assessment -
may have jagged a faulty alternator?
Cheers
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