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 Ron Your Own Question
Ron, ASE Certified Technician
Category: Ford
Satisfied Customers: 35837
Experience:  23 years with Ford specializing in drivability and electrical and AC. Ford certs and ASE Certs
Type Your Ford Question Here...
Ron is online now
A new question is answered every 9 seconds

E350: ron we are blowing the 30 amp fuse on the pmc #21

Customer Question

hi ron we are blowing the 30 amp fuse on the pmc #21 any suggestions
Submitted: 2 years ago.
Category: Ford
Expert:  Ron replied 2 years ago.
Hello and thank you for the question, the most common cause that can cause the #21 fuse to blow is the wiring harness going to the HO2S sensors. Get down under the van and inspect the harness to all of them to make sure the harness is not laying on the exhaust, its pretty common to find that is the case. Check this first and post back if you still need more help and we can work from there if need be.