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Matt, Engineer
Category: UK Ford
Satisfied Customers: 20366
Experience:  BEng hons Mech engineering, in auto industry 23 years
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Key will not start car, The battery is fine, 2014 fiesta,

Customer Question

Key will not start car
JA: Does the engine turn over? How old is the battery?
Customer: The battery is fine
JA: What is the model/year of your Ford?
Customer: 2014 fiesta
JA: Are you hoping to fix this yourself? What have you tried so far?
Customer: Tried jiggling steering wheel put on seat belts made sore it was in park tried other key
JA: Anything else you think the mechanic should know?
Customer: We are out of town at a hotel
JA: OK. Got it. I'm sending you to a secure page on JustAnswer so you can place the $5 fully-refundable deposit now. While you're filling out that form, I'll tell the Ford Mechanic about your situation and then connect you two.
Submitted: 4 months ago.
Category: UK Ford
Expert:  Matt replied 4 months ago.


If the car's not cranking then first check it can turned over by hand so double checking for any mechanical issues

If OK then check that the main battery cables are on tight and the terminals are clean and bright. Do the same for the engine / gearbox earth strap.
Then follow the main positive lead back to the engine and down to the starter motor, and check the connection at this end as well.

There should also be a small wire to the motor which should have 12V when you're turning the ignition switch to crank. If the 12V isn't there, check back along this wire for damage to the insulation or corroded connections

This 12V feed comes directly from the ignition switch so this may be faulty and need replacing

Check the resistance of the main positive lead that runs down to the motor as anything more than a few ohms and it should be replaced

Don't forget to try a jump start from another car / battery as its possible the battery is poor, if you have a voltmeter a healthy battery should read 12.7+V

also try substituting the battery for another as I've known a very flat battery to drag down the system voltage too far even with jump cables

one other thing to consider is that the immobiliser is faulty and preventing the starter from being enabled - however if the dash / ignition lights are on then this usually means that its off

If this is all OK then its possible the car needs a new starter motor

Expert:  Matt replied 4 months ago.


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