voltage problem? or is it? - MustangForums.com


Classic Mustangs (Tech) Technical discussions about the Mustangs of yester-year.

Reply
 
 
 
Thread Tools Search this Thread
Old 08-27-2015, 09:53 PM   #1  
toastintx64
Thread Starter
 
toastintx64's Avatar
 
Join Date: Jul 2015
Location: Texas
Posts: 13
Default voltage problem? or is it?

hey guys, got a dumb question. i just installed an electric fan and im wondering if its pulling my volts down too much. when i start up the car (1965 mustang completely new wiring) the after market volt gauge (not accurate) is showing 14 volts when i turn on the fan the meter drops to 12 volts if i turn on the ac it drops to about 10 volts. i have a brand new Powermaster 140 amp alternator one wire. the cars seems to be running ok just alittle worried if im pulling too much. oh and i have two small radio amps that pull about 25 amps. when the internal voltage regulator in the amp kicks on the radio "pops" any ideas please!
Thanks
Johnny
toastintx64 is offline   Reply With Quote
Old 08-29-2015, 05:12 PM   #2  
67mustang302
6th Gear Member
 
Join Date: Apr 2007
Location: California
Posts: 10,468
Default

Need to know how things are wired, particularly the fan and voltage gauge.

A lot of the factory wiring was undersized even for back then, so you add a few things that pull from circuits that are too small and you get a voltage drop. You can wire a **** ton of relays to a circuit like that for the coil side, because they operate even with very little voltage, and the voltage may show low; but the actual power/switch side of the relay may be 14.5 or whatever.
67mustang302 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Fuel Pump & Injectors pimp2303 5.0L (1979-1995) Mustang 3 09-17-2015 08:45 PM
OBD: The Adventure Begins (PO402 and PO401), DPFE/EGR test procedures TfcCDR V6 (1994-2004) Mustangs 1 09-14-2015 12:08 PM
87 4cyl battery drain issue wilsonro 4 Cylinder NA and Turbo 0 09-11-2015 07:13 AM
Help! Metra 70-5521 AMP Harness Install cbird1177711 2005-2014 Mustangs 2 09-03-2015 08:43 PM
Best Place To Run Power Wire/Firewall '08 cbird1177711 2005-2014 Mustangs 3 09-02-2015 08:51 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not 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 Off
Pingbacks are Off
Refbacks are Off

Forum Jump

Advertising
Featured Sponsors
Vendor Directory

All times are GMT -5. The time now is 06:31 AM.


© 2018 MH Sub I, LLC dba Internet Brands
We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.