| Author |
Message |
JRV (Jrvall)
Intermediate Member
Username: Jrvall
Post Number: 2344
Registered: 11-2002
| | Posted on Sunday, August 31, 2003 - 8:14 pm: | |
>>The alternator excitation voltage is wired thru the idiot light on the dash...Without that voltage, the alternator won't charge. <<
yep...!
might add that the Digiplex Units aren't real fond of Low Voltage either.
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David Feinberg (Fastradio2)
Member
Username: Fastradio2
Post Number: 301
Registered: 4-2002
| | Posted on Sunday, August 31, 2003 - 7:04 pm: | |
Jim,
Likely, the BB is wired the way most cars of that era were... The alternator excitation voltage is wired thru the idiot light on the dash...Without that voltage, the alternator won't charge.
I remember vividly working with charging problems on the older British cars....with no charging occuring. Turn key on, no alternator warning light. Replace charging bulb - Charging system now functional.
I believe you'll find that to be true, after looking at the wiring diagram.
Regards,
David |
James Selevan (Jselevan)
Member
Username: Jselevan
Post Number: 734
Registered: 6-2002
| | Posted on Sunday, August 31, 2003 - 6:51 pm: | |
Breaking news - I studied the schematic once again, and found an idiot light for each alternator (left and right) located in the revolution counter. So I plugged in the rev counter (which I had not yet installed) and Low and Behold, the system is not charging! When I turned on the ignition but did not start, the 2 lights illuminated as they should. Once I started the car, the lights extinguished and the ampere meter is charging as it should.
I will have to restudy the schematic to see why the rev counter must be in the circuit to allow charging.
Jim S. |
James Selevan (Jselevan)
Member
Username: Jselevan
Post Number: 733
Registered: 6-2002
| | Posted on Sunday, August 31, 2003 - 5:54 pm: | |
Some weeks ago I raised the question of the amp meter acting as a voltmeter across a known shunt resistor.
I re-leathered my console and dash, and have completed reassembly to find my system not charging. It appears that the regulator has gone south. For several days I drove the car without an amp meter, with the ends insulated from each other. Did I fry the regulator?
I ascertain that the regulator is located in the left alternator. Is this a difficult task - to replace the regulator? Must the alternator be removed, or is the regulator a unit that can be detached from the alternator and replaced?
Help is greatly appreciated.
Jim S. |
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