Mechanics

F250 390

1972 Ford F-250 • V8 4WD Manual • 60,000 miles

When I hit the key the truck fires but wont stay lit
Avatar
Frozen1972
August 13, 2011.



CHECK

POSITIVE WIRE TO COIL FOR VOLTAGE--KEY "ON"

POSITIVE WIRE TO COIL FORE VOLTAGE--KEY "START"

IF NONE, WITH "ON"

CHECK RESISTANCE WIRE/ BALLAST RESISTOR.....THIS WOULD COME FROM THE "ON" POSITION OF THE IGN SWITCH TO THE COIL

THE INITIAL "FIRING" MAY BE FROM "I" TERMINAL AT THE SOLENOID--THIS IS NORMAL AND CORRECT (IF YOUR IS SET UP THAT WAY---REFER TO THE PICS AND EXPLANATIONS IN THE "BOTTOM", OF THE LINK I SEND YOU)

MAKE SURE YOU HAVE CORRECT COIL

COULD BE A FAULTY IGNITION SWITCH

DO YOU HAVE POINTS?....OF ELECTRONIC IGNITION?

SORTA USE MY LINK, EXPLANATIONS AND PICS TO TEST VOLTAGES, WHEN AND WHERE THEY SHOULD OCCUR

http://www.2carpros.com/questions/1992-ford-ranger-wont-start

LET ME KNOW IF THIS HELPS OR YOU NEED MORE ENCOURAGEMENT!

I HAVE A LITTLE BIT MORE TO OFFER, IF YOU STILL AIN'T GOT IT!

THE MEDIC


Tiny
CJ MEDEVAC
Aug 13, 2011.