Question about Ford E-250
The ignition switch in a Ford Econoline E250 van sends an electrical signal to the starter motor when the ignition key is turned. Once the switch fails, you'll need to replace it. Replacement switches are available from most auto parts stores. The switch and cylinder are one unit and are secured to the steering column with a single retaining pin. You'll need to use a special tool, called a punch pin, to remove the switch.(((((((((((
Check for voltage at the coil positive terminal when you turn the key on. If you have voltage, current is flowing through the ignition switch to the coil. If there is no voltage, they the fault is in the ignition switch circuit (check the wires and fuses, if okay replace the switch -- or try bypassing the switch with a fused jumper wire to get voltage to the coil to see if it will start).
If the coil is getting voltage, turn the key off and measure the coil primary and secondary resistance with an ohmmeter. The primary resistance between the positive and negative terminals is usually about 0.5 to 2.5 ohms. If it reads open or significantly higher, replace the coil. The secondary resistance is measured between the coil positive and the high voltage terminal. It is typically 15,000 to 25,000 ohms. If it reads open or a lot higher, replace the coil.
If the coil has voltage when the key is on, but you are still getting no spark when you crank the engine, there must be a bad wiring connection at the ignition module.
If you have spark but the engine is not starting, the engine is not getting enough fuel pressure or maybe no fuel at all. Check the fuel pump fuse and relay, and listen for the pump to run for a few seconds when the key is first turned on.
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Posted on Jun 06, 2010
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Posted on Jan 02, 2017
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