1979 Other GMC Models

1979 GMC
Avatar
DAN C
  • MEMBER
  • 1 POST
Electrical problem
1979 Other GMC Models 4 cyl

Why is a resistor needed or not needed on an ignition system?
Nov 12, 2008 at 4:46 PM
Advertisement
Avatar
HMAC300
  • ✓ASE Certified Mechanic
  • 48,601 POSTS
  • ASE Certified Mechanic
if you have a points type system and some electronic ignitions if you don't have a resistor to cut the voltage down from 12 down to about 9 it will burn the points right up and damage some of the electronics in the electronic system. Not all electronic systems need resistors though.
Oct 10, 2009 at 9:26 AM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.