Dash lights flashing

Asked by Magpie02 Jun 01, 2019 at 10:32 PM about the 2007 Ford F-350 Super Duty

Question type: Maintenance & Repair

Dash lights are flashing after  replacing the crank case positioning sensor.  
Help!

4 Answers

89,375

When I hear of flashing dash lights, the first thing I think of is a defective alternator. When you replaced the crank position sensor, you might have caused an electrical problem in the alternator or regulator if you did it without first disconnecting the battery. Go to a car parts store and have the alternator and battery checked, probably free.

1 people found this helpful.

What if the alternator is ok but the flickering still happens?

89,375

If it actually is good, maybe the voltage regulator is bad; many vehicles have the VR in the alternator. Otherwise, it could be a defective battery, loose/corroded cables, a fault in the wiring (hot or ground). More remote, but it might even be a problem in the computer (PCM). Another even more remote possibility is loose or defective ignition wiring, sending thousands of volts into the car's electrical ground.

2 people found this helpful.

We ended up buying a new alternator and two new batteries. Thank you for your time.

Your Answer:

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