Coil

1991 DODGE TRUCK
150,000 MILES • 5.2L • V8 • 2WD • AUTOMATIC
Avatar
MEVANS12313
  • MEMBER
  • 1 POST
How u tell if coil is bad
Jan 24, 2016 at 6:56 PM
Advertisement
Avatar
ASEMASTER6371
  • ✓ASE Certified Mechanic
  • 52,796 POSTS
  • ASE Certified Mechanic
with the key on, verify power to the positive side of the coil. if you have power, check the negative side. there should be power there as well. with a test light, crank the engine and probe the negative side of the coil. the test light should flash. if it does, and there is no spark, then the coil is bad. if the light does not flash, the coil is not being triggered to fire

Roy
Jan 25, 2016 at 7:01 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.