Alert icon
We're changing our privacy policy. This stuff matters.  Learn more  Dismiss

Ballast Resistor - How to Test

Loading...

Sign in or sign up now!
Alert icon
Upgrade to the latest Flash Player for improved playback performance. Upgrade now or more info.
52,883
Loading...
Alert icon
Sign in or sign up now!
Alert icon

Uploaded by on Nov 4, 2008

Unsure how to tell if your Classic British Car has a ballast resistor or not? The Moss Motors Tech department has put together this video tip to show you how to test your car in less than a minute.

  • likes, 2 dislikes

Link to this comment:

Share to:
see all

All Comments (5)

Sign In or Sign Up now to post a comment!
  • After doing my own test on to old coils.One with a Ballast Resister in it and one without I found 10.4V on the 1.5 Ohms coil and 11.7 V on the 3 Ohms coil.Then put in a Ballast Resister & I got 6.1 V on the 1.5 Ohms coil & 8.4 Volts on the 3 Ohms coil. The battery was 12.6Volts

  • but what if the coil has a ballast resistor in it.

  • very useful information.thanks

  • Yes, but, if the points happen to be open during this test it will show approx 12v whether or not it has a ballast resistor. Make sure the points are closed or jump the negative wire to ground while measuring the voltage.

  • so simple even I get it :)

Loading...
Alert icon
0 / 00Unsaved Playlist Return to active list
    1. Your queue is empty. Add videos to your queue using this button:
      or sign in to load a different list.
    Loading...Loading...Saving...
    • Clear all videos from this list
    • Learn more