Re: alternator circuit question
From: Jim Thompson (thegreatone_at_example.com)
Date: 12/22/04
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Date: Tue, 21 Dec 2004 18:08:26 -0700
Jon, Surf back a few weeks, this problem has been addressed recently.
On Wed, 22 Dec 2004 00:33:04 GMT, "Jon G." <jon8338@peoplepc.com>
wrote:
>This idea of installing an external voltage regulator to bypass
>a faulty computer, doesn't work. I put one on and it charged at
>14 volts for about a day, then it jumped to 18 volts. I tried a
>different brand voltage regulator, and it did the same. The
>battery is boiling and smells like sulfur, the high beams went
>out, and I'm in the hole for 2 voltage regulators that work like
>junk.
>
>I have a 7 watt 1.2 ohm ceramic resistor out of a TV set. It
>can only handle 2 amps. If I put it in series between the
>regulator and the alternator field, it should drop the voltage
>to the field by 3 volts. However, I think I need a heavier duty
>resistor.
>
>Jon
>
>Jon G. wrote:
>
>> I have a 91 Plymouth Acclaim, and the alternator doesn't charge the
>> battery. I took the alternator out and had it tested, and there's
>> nothing wrong with it. I put a new battery in it, but it still won't
>> charge. I checked the fuseable link from the alternator to the battery,
>> and there is continuity. Therefore, it must be the computer.
>>
>> there are 4 connections on the alternator
>>
>> L1: direct to battery, positive
>> L2: direct to battery, negative
>> c1: small wire, logic, to computer, activates diode
>> c2: small wire, logic, to computer, also battery ground.
>>
>> I want to activate the alternator continuously and put on an external
>> voltage regulator.
>>
>> What must the voltage (and current), to the logic inputs c1 & c2 be to
>> do so?
>>
>> I have in mind to run a potentiometer between L1 and c1, and adjust it
>> until the alternator kicks on.
>>
>> The schematic shows that c1 goes to the coil of a transformer in the
>> alternator, which then goes to one of the diodes (an SCR?)
...Jim Thompson
-- | James E.Thompson, P.E. | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona Voice:(480)460-2350 | | | E-mail Address at Website Fax:(480)460-2142 | Brass Rat | | http://www.analog-innovations.com | 1962 | I love to cook with wine. Sometimes I even put it in the food.
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