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 Ray M. Your Own Question
Ray M.
Ray M., Ford Master Tech
Category: Ford
Satisfied Customers: 3053
Experience:  30+ years in trade, Ford Master Tech, Journeyman Automotive Tech
Type Your Ford Question Here...
Ray M. is online now
A new question is answered every 9 seconds

Will my f350 crank if the pcm power diode is bad, it is a

Customer Question

will my f350 crank if the pcm power diode is bad
JA: How many miles are on the car? Is it an automatic or a manual transmission?
Customer: it is a auto dually
JA: What is the model/year of your Ford?
Customer: 1996
JA: Are you hoping to fix this yourself? What have you tried so far?
Customer: checked all fuses and changed relays... we wanna know if the power diode will cause truck not to crank
JA: Anything else you think the mechanic should know?
Customer: thats all want crank
Submitted: 1 year ago.
Category: Ford
Expert:  Ray M. replied 1 year ago.

Yes it will still crank it just wont fire and run.

Customer: replied 1 year ago.
Any way to use a jumper wire in place if the pcm power diode
Expert:  Ray M. replied 1 year ago.

I would not recommend it, as sensitive circuits in the PCM could be damaged.

Customer: replied 1 year ago.
Ok the wait to crank light comes on and goes off when time check engine light is not on getting fuel in fuel filter but still want crank. What could it be
Expert:  Ray M. replied 1 year ago.

It could be a number of things, but experience tells me it is most likely either the bad Pcm diode or it could be a faulty camshaft sensor or as simple as a bad glowplug relay. Is there any smoke from the exhaust when you are cranking it over?

Expert:  Ray M. replied 1 year ago.

I will be away for the rest of the day, but will be back online around 7:00 pm.