alternator circuit question

Citroen (SP?) did well lasted a long time, have a reno now, exloded last
week, ah off topic again....

Chris

 

Pondering, it could be a form of temperature compensation. In a
Citroen, who knows ;-)

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice480)460-2350 | |
| E-mail Address at Website Fax480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.

 

The engine control computer has the regulator built in, and an
external regulator CAN be installed.

 

Hi D.S.,

We rigged it up like you said, and the thing works! I got a
voltage regulator at Advance Auto from off your list, wired
everything, and now there's 14 volts of charge on the battery.

Thank you for your help. It saved me from having to get another
computer.

Regards,

Jon

 

Once again the forces of goodness and light triumph over the forces of
rottenness and dark.

Which one did you wind up getting?

Did you have to put a resistor across the original field wires to keep the
Check Engine light from coming on?

N/P, glad to help.

DS (Those who said this wouldn't work: Neener-neener-neener.)

 

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, Surf back a few weeks, this problem has been addressed recently.

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice480)460-2350 | |
| E-mail Address at Website Fax480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.

 

How about going to the local salvage yard and buying a used computer instead
of putting yourself through all that other crap?

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Works great if you do it right.

Sounds a lot like you did it wrong. I bet I know exactly which step you
skipped 'cause you figured it was unnecessary. But there's a reason it was
written specifically into the procedure!

Quit fuckin' around with resistors. Put the external regulator in
correctly and it'll do just fine for you, as it's done just fine for many
others before you and will do fine for many others after you.

 

*snip stupid ideas about TV resistors*

It's also quite possible that you installed the external regulators
correctly, but your alternator's rotor is drawing excessive current, which
fried the ECM's voltage regulator and has fried your two externals. Parts
store alternator "testers" are very crude devices. I'd post the rotor
current draw spec, but the manuals are in my office.

DS

 

Of course it WORKS, but only if a bad regulator was the original problem.

You've most likely got a bad alternator rotor (shorting to ground) which
causes an over-charge condition. The regulator is on the GROUND side of
the rotor, so if the rotor is shorted to ground the regulator has
absolutely zero effect on the charge current.

 

The fellow who gave me this advice could rattle off several
voltage regulator models, but he was in it to "close the hood"
on more than a supposed fixit. He knows enough to be dangerous,
and is convincing enough to come across as someone who knows
what he's talking about. I'd advise anyone to steer clear of
him. Below is his reply to my previous post:

=====

The regulator is a part of the Single Board Engine Controller, yes.

What you are calling "logic" wires are the field wires.

<etc>

The way you plan to do it will not work.

Here is a fix that *will* work, without replacing the engine
computer and
without causing any additional problems:

First, pick one of the following regulators:

Regular normal electromechanical regulator:
NAPA Echlin VR32

Extra heavy duty electromechanical regulator w/vibrationproof mount:
NAPA Echlin VR34

Extra heavy duty electromechanical regulator w/vibrationproof
mount and
convenient external voltage adjustment screw:
NAPA Echlin VR35, Standard-Bluestreak VR106

Transistorized regulator with no moving parts (no adjusting screw):
Standard-Bluestreak VR101, Wells VR706 (the wells item is very
inexpensive; it works but Wells doesn't make my favourite stuff)

Waterproof potted IC regulator with no moving parts (no
adjusting screw):
NAPA Echlin VR1001, Standard-Bluestreak VR128


Any of these regulators will have two terminals on it, one
marked "IGN"
and the other marked "FLD". (the VR1001 and VR128 have the "fld"
terminal
on the end of a short wire lead). The alternator gets the
original C1 and
C2 wires removed from its two field terminals (right next to
each other,
small studs with nuts retaining the two flag terminals).

The regulator IGN terminal gets 12V via the ignition switch, and
the "FLD"
terminal gets connected via a wire to one (either) of the field
terminals
on the alternator. The other field terminal on the alternator gets
connected via a wire to ground. Run a ground wire -- 16ga is
plenty --
between the regulator base and the battery negative terminal,
and mount
the regulator such that it won't rock 'n' roll around. At this
point, your
charging system will once again work fine. If you got the adjustable
regulator, set it for 14.2v across the battery with the engine fully
warmed up and ambient temperature above 50F.

If your "Check Engine" light comes on, put a resistor across the two
original field wires C1 and C2 before securing these wires such
that they
can't ground out or get caught in any moving parts.

Close the hood; you're done.

 

Sure, fine, whatever, Jon. It didn't work for you 'cause you failed to
diagnose your problem correctly, but rather than do so, you'd rather futz
around with TV resistors and other bubblegum-and-duct-tape fixes.

I've been here in this forum for well over a decade, and have owned a
great many Mopars, and -- here's the fun part, Jon -- the external
voltage regulator fix has worked for a great many people who took the
time to diagnose their systems correctly and do the work right.

Your laziness is nobody's fault but your own.

Toodles,

DS

 

I remember this post. Did you in fact follow his advice, and it caused
problems...or did you follow his advice incorrectly and it caused problems??
I don't understand why you claim....a SCAM??? Did he in fact take money
from your wallet?? Did you send him some cash in thanks for his advice??

I'm confused. 98% of the people here either 1.) have a problem that needs
to be corrected, or 2.) give advice as to how to fix it. Arm chair
trooubleshooting is not that easy, and I do not pass out information that I
am unsure of. It is up to YOU whether or not the advice you take is sound.
Not following the whole scam thing......

Sounds to me DJS is not to blame for giving out advice on a forum that will
in fact do nothing to benefit him, but you for taking it, or taking it
wrong.

Here's something you could try. Unfasten all of the electrical terminals in
the charging system one by one, and then lick each one before reinstalling
them. This will mysteriouly solve all your problems..........

Or you could just change the computer.

jest my $.02

Eightupman

 

why don't you stop crossposting all the other groups. You got scammed when
you first bought a Chrysler, I've been there too. This is only one example
of their poor design, you will hit many more problems like this.

 

Always try to steer away from modifications and seek out the problem. By
modifing an electrical system to work may be ok, but you never no where the
broken part of the circuit is, it may be a loose or corroded wire that
could cause other problems, But how can you bad mouth/insult someone on
here that is trying to help you out, the people here can not see the
vehicle, they try to give assisitance due to past experience or because
thats the profession of the person,
Maybe Mom needs to place a Haynes manual under your tree? any way Merry Xmas
Glenn Beasley
Chysler Tech

 

More like; you haven't a clue how that charging system works.

I've been doing that repair since before your car was new, and it
-does- work. It's saved many people hundreds of dollars in
avoiding having to replace Power Modules, SMECs and SBECs because
one little internal circuit gave up the ghost.

 

Eightupman: Betchya a virtual beer that even if our cheapskate buddy Jon
goes on www.car-part.com (searchable used auto parts nationwide) and finds
a good used computer for a price he'll pay, his faulty alternator will
cook the voltage regulator inside the new used computer in short order.

DS

 

[snip]

You ignorance far exceeds the reference standard... you are hereby
presented with a Burridge Award with Gold-Leaf Cluster, and a special
addition for today, since it's Christmas, PLONK!

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice480)460-2350 | |
| E-mail Address at Website Fax480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.

 

brown,
about 6 minutes on each side.



Shish Kababes

As old as the hills, this technique has employed seafood, beef, pork, lamb,
poultry, and vegetables; just about anything can be grilled, and young humans
are no exception!

High quality marinade (Teriyaki and garlic perhaps)
1 inch cubes of tender meat, preferably from the nursery
Onions
bell peppers
Wooden or metal skewers

Marinate the meat overnight.
Get the grill good and hot while placing meat, vegetables, and
fruit such as pineapples or cherries on the skewers.
Don?t be afraid to use a variety of meats.
Grill to medium rare,
serve with garlic cous-cous and sautéed asparagus.
Coffee and sherbet for desert then walnuts, cheese, and port.
Cigars for the gentlemen (and ladies if they so desire)!



Crock-Pot Crack Baby

When the quivering, hopelessly addicted crack baby succumbs to death,
get him immediately butchered and into the crock-pot, so that any
remaining toxins will not be fatal. But don?t cook it too long,
because like Blowfish, there is a perfect medium between the poisonous
and the stimulating. Though it may not have the s