How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Dave Nova Your Own Question
Dave Nova
Dave Nova, GMC Technician
Category: GMC
Satisfied Customers: 19451
Experience:  ASE Master Certification. GM World Class Certification
11042942
Type Your GMC Question Here...
Dave Nova is online now
A new question is answered every 9 seconds

GMC Jimmy 4x4 (Mid Size): why does the ecm fuse keep blowing

Customer Question

why does the ecm fuse keep blowing when I try to start my 2000 gmc jimmy.i checked the pink ignition wire it lights up the test light when in on position but at the end where the connector connects to coil pack the test light does not light up when in on position. please help!!
Submitted: 1 year ago.
Category: GMC
Expert:  Dave Nova replied 1 year ago.
Is it the ECM B or the ECM I fuse that is blowing?
Customer: replied 1 year ago.
Ecm 1
Customer: replied 1 year ago.
It's the ecm 1 15amp fuse.
Expert:  Dave Nova replied 1 year ago.
Does that fuse blow as soon as the ignition is turned ON?
Customer: replied 1 year ago.
Yes it does.
Expert:  Dave Nova replied 1 year ago.
One at a time, disconnect each of the following components, replace the fuse and turn key on. When the fuse no longer blows, you will know which component is causing the short.ignition coilignition module crankshaft position sensorfuel injector main connectorPCM (engine control computer)If none of these components is shorted, inspect the pink wire on the harness near each of these components for damage (pinched or chafed). Let me know if you need additional assistance.

Related GMC Questions