14 volys at batt and alternator, guage says 12 volts??? - Team Camaro Tech
Electrical & Wiring Troubleshooting electrical.

 
LinkBack Thread Tools Display Modes
post #1 of 4 (permalink) Old Jul 21st, 03, 04:23 AM Thread Starter
Senior Tech
 
Join Date: Apr 2001
Location: Newark, Ohio
Posts: 706
Post

So I was doing some trouble shooting this weekend on my electrical system and i am lost. I was told to measure the volts at the battery and the alternator with car running and all my lights and fan on and see what the volts say. I have been having a problem with the volts dropping down past 12 volts. So I tested and I get 13.9 volts at the battery, 13.9 volts at the alternator and 13.9-14 at the horn relay with everything on. the guage in dash stills reads 12 volts and sometimes flucuates lower and higher. What the hell? I don't know where to look next. Everything is brnad new too. Any more suggestions? I also ran the 8 guage wire direct from the battery to the alternator and now when I taop the brakes the volts drop.

67 Camaro Pro Street, 540 Bill Mitchell Merlin big block, Merlin Aluminum heads, Holley 870, hydraulic camshaft, 2" Hooker Super Comp headers, Mallory and Crane ignition system, TH400, 2600 stahl, Ford 9" w/ 4:10 gears and posi.
Erik Beckett is offline  
Sponsored Links
Advertisement
 
post #2 of 4 (permalink) Old Jul 21st, 03, 06:21 AM
Senior Tech
 
Join Date: Apr 2003
Location: Allen, TX
Posts: 2,108
Post

Check the ground your gauge is using??

1969 Camaro - GM 2003 Electron Blue
Beck Racing 383 cu in 465HP Engine - Sean Murphy Inductions Stage 2 Quadrajet
TCI Streetfighter 350 - 3.73:1 Posi 10 Bolt Rear - 12.6 sec qtr mile

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
and
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Brian Lewis is offline  
post #3 of 4 (permalink) Old Jul 21st, 03, 10:00 AM
Senior Tech
 
Join Date: Sep 2001
Location: Temple City, Ca
Posts: 523
Post

When you are doing your tests what you measure on the fuseblock BAT and IGN terminal? I assume that this is an aftermarket gage wired on the IGN side of the switch. If BAT looks good it’s not a ground issue. If BAT doesn’t look good it may be the forward lamp harness positive lead connection on the horn relay or a ground.
John_Muha is offline  
 
post #4 of 4 (permalink) Old Jul 21st, 03, 11:08 AM
Senior Tech
 
Join Date: Mar 2002
Location: Austin, TX, USA
Posts: 5,277
Post

Guage could be out of calibration also. Do the voltage checks as others have suggested. Best of all is to measure the voltage between the + - leads of the guage (wherever they may be connected). Many of the guages have a calibration pot inside the lamp socket. Just don't tweak it without checking though. If you do have an electrical system problem, a miscalibrated guage won't be of much use.

-dnult

Dave
========================
68 Coupe, 350 w/ Edelbrock Performer RPM heads, cam, intake, 700R4, Dave's small body HEI
dnult 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