Re: [DML] Re: Re: Alternator-wiring

[dherv10@xxxx]

Jan: See below.
John Hervey
www.specialTauto.com
The brown / yellow wire (Light wire) is energized via the main relay when the 
key is turned on and the battery light lights. If it's working. Then when the 
alternator starts turning it sends and opposing voltage back to the light and 
turns it off. 
If the battery light bulb doesn't come when you turn the key on, then there 
is something wrong in the wiring or the regulator isn't grounded properly for 
the light wire use.The bulb # ( 161 ) has the proper resistance and acts 
like a ballast resistor to keep from burning up the regulator. Hooking a 
straight brown wire or straight voltage up to the regulator will render it 
useless in about 30 seconds or less. I use # 411HD ( Heavy duty Delco type ) 
regulator and only the light wire terminal. Others wires are cut off. 
John


<< > Jan, As you may know by now the brown/yellow wire is called the light
> wire. That is the only wire used on the new GM regulators that I build.
[snip]
> If the brown wire is hooked up to most new style alternators
> it will burn up the regulator after a bit.

I was afraid of that, so I tried putting the wires from the alternator
together and then going to the light, but this didn't work; no charging,
no volt-reading on the gauge...( This could have burned it up immediately)

At Idle without any accessories running we got 13.4V at the starter-post,
revving the engine produced between 14.6 and 14.8V, dropping to 14.2V
with the lights and highbeams on.
( 13.4 long shot could have been battery voltage or a damaged regulator 
trying to hold on.) You have to have RPM's to maintain the voltage. There is 
very little to no current till the alternator reaches about 1500 RPM on the 
rpm gauge. 

> Without the brown /yellow wire hooked up the light won't come on and
> the alternator won't charge. Also, if the dash light goes out the
> alternator won't charge. Use a 161 bulb only.

Allready knew that from you ;-) Now I could REALLY use some suggestions;
without the light-wire I get no charging. ( Replace the bulb and check 
connections) without the sense-wire there's no charging either! 
But I'd hate to burn up the regulator; should I put
in a resistor of some sort? 
Any suggestions?

I didn't pay much attention to the brand of alternator, but I know it's
an aftermarkert one, no Ducellier of Motorola. The owner bought it locally.
If important I could ask him what brand/type it is...

Thanks for the help,

>>