Problem with the charging system... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

70cst10 · 06-13-2005, 09:39 PM

I've just about given up here.. My blazer has been driving me nuts lately. I've had to disconnect the battery to keep it from draining overnight. It hasn't been charging the battery much (if at all) either, but it will run fine without the battery hooked up. I've noticed that when I connect the battery, it sounds like the contacts in the voltage regulator are closing. It doesn't matter if the ignition is on or off. There is a loud click coming from the reg itself. I've replaced the voltage regulator with no improvement. The new one does the same thing. Could my problem be in the guage itself? What else is there? The battery is brand new. I just replaced it last weekend. I'd appreciate any help I can get here!!!

Milan

vtblazer · 06-13-2005, 09:49 PM

Consider going with an interal regulated alt.
There's a great write up in the FAQ section on how to do it, it's very easy/quick.
You'll gain overall charging capacity and loose the old 'black box'.

Here ya go.
http://207.44.196.117/vboard/showthread.php3?t=119379

71jimmy · 06-14-2005, 01:03 AM

Possible short? To test for a short, with key off, insert a test light between the positive terminal on the battery and the disconnected positive battery terminal clamp. If the test light comes ON there is a short in the electrical system that is draining the battery.

70cst10 · 06-14-2005, 05:11 AM

there's definitely a short. What boggles me is that the VR (old one and new one) will get hot overnight if I leave the battery hooked up. Does anybody here know how this circuit actually works? What causes the coils to close the contacts in it?

jhow66 · 06-14-2005, 11:53 AM

Your problem sounds like your alt. Unhook the red wire at alt. and see if battery stays up.

71jimmy · 06-14-2005, 12:02 PM

Agree with Jhow66, you could have shorted windings in the alt. That's probably why your regulator "clicks" everytime you connect your battery.

06-13-2005, 09:39 PM	#1
70cst10 Senior Member Join Date: Jun 2001 Location: Gaston, SC Posts: 580	Problem with the charging system... I've just about given up here.. My blazer has been driving me nuts lately. I've had to disconnect the battery to keep it from draining overnight. It hasn't been charging the battery much (if at all) either, but it will run fine without the battery hooked up. I've noticed that when I connect the battery, it sounds like the contacts in the voltage regulator are closing. It doesn't matter if the ignition is on or off. There is a loud click coming from the reg itself. I've replaced the voltage regulator with no improvement. The new one does the same thing. Could my problem be in the guage itself? What else is there? The battery is brand new. I just replaced it last weekend. I'd appreciate any help I can get here!!! Milan __________________ Milan 1964 Chevelle SS 283/M20

06-13-2005, 09:49 PM	#2
vtblazer Registered User Join Date: Oct 2003 Location: Central Vermont Posts: 8,537	Consider going with an interal regulated alt. There's a great write up in the FAQ section on how to do it, it's very easy/quick. You'll gain overall charging capacity and loose the old 'black box'. Here ya go. http://207.44.196.117/vboard/showthread.php3?t=119379 Last edited by vtblazer; 06-13-2005 at 09:51 PM.

06-14-2005, 01:03 AM	#3
71jimmy Registered User Join Date: Mar 2004 Location: Sacramento, CA Posts: 1,083	Possible short? To test for a short, with key off, insert a test light between the positive terminal on the battery and the disconnected positive battery terminal clamp. If the test light comes ON there is a short in the electrical system that is draining the battery. __________________ '71 Jimmy, 350, SM465, NP205, 2in Tuff Country lift, 33s on rallies, TBI, softtop and hardtop "If life was fair you'd be able to afford one of each and a garage large enough to house them all."

06-14-2005, 05:11 AM	#4
70cst10 Senior Member Join Date: Jun 2001 Location: Gaston, SC Posts: 580	there's definitely a short. What boggles me is that the VR (old one and new one) will get hot overnight if I leave the battery hooked up. Does anybody here know how this circuit actually works? What causes the coils to close the contacts in it? __________________ Milan 1964 Chevelle SS 283/M20

06-14-2005, 11:53 AM	#5
jhow66 Registered User Join Date: Jun 2002 Location: Knoxville Tenn. Posts: 3,058	Your problem sounds like your alt. Unhook the red wire at alt. and see if battery stays up. __________________ 56 Chevy Bel-Air 2dr. HT (purchased new) 71 Chevy Cheyenne SWB PU (502HO) 65 GMC short bed step--work in progress and my gofer

06-14-2005, 12:02 PM	#6
71jimmy Registered User Join Date: Mar 2004 Location: Sacramento, CA Posts: 1,083	Agree with Jhow66, you could have shorted windings in the alt. That's probably why your regulator "clicks" everytime you connect your battery. __________________ '71 Jimmy, 350, SM465, NP205, 2in Tuff Country lift, 33s on rallies, TBI, softtop and hardtop "If life was fair you'd be able to afford one of each and a garage large enough to house them all."

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