my generator light stays on - Team Camaro Tech
Electrical & Wiring Troubleshooting electrical.

 
LinkBack Thread Tools Display Modes
post #1 of 10 (permalink) Old May 28th, 04, 10:57 AM Thread Starter
Senior Tech
Tom
 
Join Date: May 2001
Location: Socorro, New Mexico, USA
Posts: 574
Send a message via MSN to kausboy
Post

I have been pouring over the old posts and reading MAD electric's web site and I am not finding what I need. I upgraded my alt. to an internally regulated "Si" and I used a "conversion kit" from D&R that you simply plug into the the exsisting wireing. Once the enging starts the gen. light comes on. It gets brighter and flickers at times but it stays on. I checked it with a volt meter and it seems to be charging just fine. I read something about rewiring the bulb (???). I looked at the assembly manual and am confused. I am sure the alt is good and functioning as I wish but there has to be some reason the light stays on. Suggestions?? comments?? I have serveral wire "gremlins" that I am slowly getting straighted out -this one has me pulling my hair out!!
Thanks in advance!!
kausboy is offline  
Sponsored Links
Advertisement
 
post #2 of 10 (permalink) Old May 29th, 04, 04:55 AM
Team Member
Dave
 
USN1969SS's Avatar
 
Join Date: Jul 2003
Location: Viera, FL
Posts: 301
Post

Not sure if your problem is the same problem as I had but...when my camaro did this I took the wireing harness out where the warning bulbs are and cleaned all the contacts. Problem fixed. They use a series type wiring so any type of poor connection can simulate a "load" and cause a light to come on.

1969, 350 "Beast", M20, Nothing Fancy, Nothing Pretty, But Sure is Fun!

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
USN1969SS is offline  
post #3 of 10 (permalink) Old May 29th, 04, 05:50 AM
Senior Tech
Mark
 
Join Date: Feb 2002
Location: LR AR
Posts: 2,372
Post

I vote for a bad diode trio. There is a small integrated circuit looking device inside the internaly regulated alternator that has no function except for to light the bulb if the alternator is not working. The bulb will glow if one of the diodes (diode trio) is popped even if the alternator is charging correctly.

You can check it out fairly easily if you can get the alternator apart. It has 3 sheet metal connections inside where it hooks up to the 3 field windings. Unscrew the nuts and pop it out. You can test it with an ohm meter. The juice runs only one way if the diodes are good.

That would be my guess. [img]smile.gif[/img]

-Mark.
stingr69 is offline  
 
post #4 of 10 (permalink) Old Jun 1st, 04, 10:11 AM Thread Starter
Senior Tech
Tom
 
Join Date: May 2001
Location: Socorro, New Mexico, USA
Posts: 574
Send a message via MSN to kausboy
Post

I guess I will open up the alt and check the diod trio. I have rebuilt a number of alternators over the years but since I converted from external to internally regulated I thought I may have a wiring problem. The alt I installed is a reman but SHOULD have had the trio replaced. I was just wondering if would matter if I just removed the bulb!

Thanks for the replies!!! I will try and get back with whatever I find.
kausboy is offline  
post #5 of 10 (permalink) Old Jun 2nd, 04, 09:03 AM
Gold Lifetime Member
Paul
 
PDQUICK's Avatar
 
Join Date: Oct 2001
Location: Londonderry, NH
Posts: 1,010
Post

The diode trio also provides primary excitation for the internal voltage regulator. That's the EE way of saying it turns on the voltage regulator as well as turning out the idiot light!!

[ 06-02-2004, 12:21 PM: Message edited by: PDQUICK ]
PDQUICK is offline  
post #6 of 10 (permalink) Old Jun 2nd, 04, 01:42 PM Thread Starter
Senior Tech
Tom
 
Join Date: May 2001
Location: Socorro, New Mexico, USA
Posts: 574
Send a message via MSN to kausboy
Post

Quote:
Originally posted by PDQUICK:
The diode trio also provides primary excitation for the internal voltage regulator. That's the EE way of saying it turns on the voltage regulator as well as turning out the idiot light!!
I thought the diode trio was used as part of the alternating to direct current rectification process. Guess that is the sole purpose of the rectifier bridge??!! Been too long since tech school!! I remember that when a car came in with the GEN light on it was usually a bad diode trio or a bad diode in the rectifier bridge. This is a brand new (reman) alt that I got. It is a 94 amp for a caprice (I think) and the light has been on since I installed it and the "conversion kit". I was just wondering if the circuit for an intrenally regulated as opposed to an externally regulated GEN light was the same?? I have read where people have installed resistors in line with the bulb??? what does that do?? Read one where the bulb was rewired?? What will happen if I just remove the bulb?? It seems to be charging -hasn't left me stranded or failed to start -I don't have any way to measure the amps output (no carbon pile) but the volts read good and my electric fan spins great. -It is just annoying to know the bulb is there and may or may NOT be functioning as it should! -Thanks everyone!!!
kausboy is offline  
post #7 of 10 (permalink) Old Jun 2nd, 04, 06:25 PM
Senior Tech
Kevin
 
Join Date: Feb 2003
Location: Beverly Hills Fl.
Posts: 587
Post

You may not have a problem. I think it is normal for the generator light to stay on when switching from an externally regulated alternator to an internal one. My light has been on for about 6000 miles. I havn't had any problems. I made a harness to get the light to go out, but then my gas gage stopped working, so I removed the harness and am living with the light. Good Luck Kevin
KRhat is offline  
post #8 of 10 (permalink) Old Jun 3rd, 04, 05:12 AM Thread Starter
Senior Tech
Tom
 
Join Date: May 2001
Location: Socorro, New Mexico, USA
Posts: 574
Send a message via MSN to kausboy
Post

Ok, just for the heck of it I tore down my alt. last night and sure enough -one of the diodes in the trio is bad. I will try and get a new one today and get it reinstalled. Thanks agian!!
kausboy is offline  
post #9 of 10 (permalink) Old Jun 3rd, 04, 06:35 AM Thread Starter
Senior Tech
Tom
 
Join Date: May 2001
Location: Socorro, New Mexico, USA
Posts: 574
Send a message via MSN to kausboy
Post

Just thought I would update this. It is always nice to know how a problem came out. I went to the parts store and got a new diode trio (story of it's own there!!), took it home and put the alt back together -problem solved! It was a bad trio in a NEW (reamn) alt.!! Thanks all!!
kausboy is offline  
post #10 of 10 (permalink) Old Jun 3rd, 04, 02:11 PM
Senior Tech
Kevin
 
Join Date: Feb 2003
Location: Beverly Hills Fl.
Posts: 587
Post

That's intresting! You never know anymore what you're going to get when you buy parts. Glad it's working. Kevin
KRhat is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Team Camaro Tech forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address.
NOTE we receive a lot of registrations with bad email addresses. IF you do not receive your confirmation email you will not be able to post. contact support and we will try and help.
Be sure you enter a valid email address and check your spam folder as well.



Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome