Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - Amp gauge
Thread: Amp gauge
View Single Post
  #7 (permalink)  
Old 04-25-2013, 10:04 PM
vicrod's Avatar
vicrod vicrod is offline
life is a ride
 

Last journal entry: 2014
Last photo:
Join Date: Nov 2005
Location: Telford, PA
Age: 71
Posts: 1,295
Wiki Edits: 0

Thanks: 0
Thanked 55 Times in 51 Posts
ohms law

There is no question that the voltmeter is the gauge of choice as compared with the ammeter.
Some of the statements here on the HRBB about ammeters, however, are incorrect. Including Madelectrical.
While it is correct that some Manufactures (Chrysler) did route the full electrical load (current) through the ammeter, GM did not. Don't know about Ford. Who cares.
All the data I have seen indicate that GM used the main accessory wire as a shunt and measured the voltage drop (IR) across this wire to drive the ammeter. It's ohms law stuff.

vicrod
Reply With Quote