1984 Ford Bronco ignition

1984 FORD BRONCO
5.0L • V8 • 4WD • AUTOMATIC
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CRAZYPEOPLEME
  • MEMBER
  • 1 POST
when i crank the bronco it starts when i let go of the key it shuts off.i put new tumbler the box under the dash still shuts off when u release the key
Feb 20, 2014 at 7:28 AM
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CARADIODOC
  • ✓Experienced Mechanic
  • 34,413 POSTS
Sounds like you have a defective ignition resistor. A tap on the starter solenoid bypasses it during cranking. There were two different coil designs used in '84. I'm not sure what they used for a ballast resistor or resistor wire, if anything. Measure the voltage on the coil's positive terminal with the ignition switch on. If you find 0 volts, follow that circuit back to determine where it's getting lost.
Feb 20, 2014 at 8:28 AM
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CJ MEDEVAC
  • ✓Experienced Mechanic
  • 11,000 POSTS
CHECK YOUR FUSES TOO!

THIS JEEP CJ ANSWER I GAVE WILL EXPLAIN WHY IT "RUNS" WHILE THE KEY IS IN THE STARTING POSITION..........YOURS WORKS SIMILAR

https://www.2carpros.com/questions/jeep-cj5-1976-jeep-cj5-voltage-drop-at-coil

KEEP US POSTED.....OR IF YOU ARE STILL IN NEED....WE TRY HARD!

THE MEDIC
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Feb 20, 2014 at 8:59 AM
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