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Ron
Ron, ASE Certified Technician
Category: Ford
Satisfied Customers: 33422
Experience:  23 years with Ford specializing in drivability and electrical and AC. Ford certs and ASE Certs
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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: 1 year ago.
Category: Ford
Expert:  Ron replied 1 year 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.