Daddylonglegs
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| posted on 12/9/13 at 03:49 PM |
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Charging Light
I've had another charging issue on my Pinto. Light comes on with ignition as normal, start the car, light goes dim but not out, rev the engine
and light gets brighter. The voltmeter is showing 14V off load and about 13.5 with main lights on. I've checked it against the multimeter and it
is the same as the voltmeter. If I take the revs up to around 3000 then the voltage rises to around 15V and if I ain't careful it will cook the
battery.
So......I changed the regulator as the obvious culprit, and still the same. Just on the of-chance, I had 2 new regs so I fitted the second
and......still faulty!! 
I've checked the belt several times and am happy that it is tensioned OK.
Anyone got any ideas please? I'm getting rather P'd off with alternators on this damn car 
It looks like the Midget is winning at the moment......
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russbost
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| posted on 12/9/13 at 04:07 PM |
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Are the reg & the rectifier separate? - sounds like you have a diode gone down
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NOTE:This user is registered as a LocostBuilders trader and may offer commercial services to other users
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britishtrident
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| posted on 12/9/13 at 05:46 PM |
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Only really get worried about cooking the battery if the voltage rises above 15v
I take it is a 1970s Lucas ACR17 type
The first thing to check is that the lucar connectors are making clean good firm contact.
Beyond that you would need to strip the alternator and check the diodes and brushes out but personally I would just chop it in for a rebuilt unit.
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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jacko
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| posted on 12/9/13 at 06:22 PM |
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Sounds like what happened to mine it was the diodes it was just easier for me to just get another alternator
Jacko
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