1987 f150 that has no power with the key in the "on" position.
I have 87 f150 that when I turn the ignition to the on position nothing happens then i turn it a little more the ingnition comes on then go ahead with the starter but when i let it go back to the "on" position it dies (no ignition). I replaced the ignition switch and key en tumbler.
Im stumped any ideas?
note: I just got done putting the engine and transmission in it out of a 1990 f150 having to change out the wiring in the engine compartment and the wiring going back to the fuel pumps, and the fuel pumps.
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Re: 1987 f150 that has no power with the key in the "on"...
Locate your fusible link wires leading from your battery the and the electrical harness, you may not be getting the accessory power to your key switch and this is supplied via this fuse wire located near the battery
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Probably not a fuse. When turning the key to on, does it give indication of power in and power out of the ignition switch-do the warning lights and gauges on the dash turn on?
If the key switch is sending power, next thing to check is the starter motor. You could take it off and have it tested, it and the starter solenoid mounted on the starter, or you could do some quick electrical testing yourself, if you have a test light or multi-meter.
If you pull off the small purple wire to the starter solenoid on the starter, you should check if the wire has power when the key is held in crank position. If it does have power, the starter or solenoid is faulty. If no power on the purple wire in start, then power is lost between the key switch and the solenoid. This part of the start circuit includes the neutral safety switch on the transmission (or the clutch switch if manual transmission), and a starter relay somewhere under the hood. Check the neutral safety switch for continuity in park or neutral. The start wire out of the ignition switch goes to this safety switch, and power is passed on to the starter if gear is in park or neutral.
Not likely the starter relay is bad, but you may need to find and check it, if all else fails.
Make sure the gear selector is fully in the park position. If it is not, you will not be able to turn the key to the position that locks the steering. This is by design, so that if someone has to turn the key off because of a runaway engine, they don't inadvertently lock the steering.
If you are getting fuel and spark at the cylinder then check the timing. It's not uncommon for worn timing chains to jump at shut off or start up. To check turn the engine over until the timingmarks on the crankshaft line up at 0. Trace the wire back from #1 piston, which is the front one on the passenger's side. On the cap it should be just to the right of the tab that locks the cap in the proper position on the distributor. Lift the cap and check the position of the rotor button. It should be directly under the tower for the wire or it should be 180 degrees off. If so turn the engine 1 turn until the timing marks line up at 0 again and look under the cap. If it's not lined up with the #1 wire, turn the distributor until it does. Tighten the distributor down and try the truck. If it fires you are looking at replacing the timing chain. If it jumped once it will jump again. Hope this helps.
no nothing will happen, if you listen for a clicking sound in the fuse box area when you turn the ignition on that meens the realy is ok, then it will possibly be a strater solinoid fault, you can try getting someone to turn the ignition over and at the same time tap the starter, this may start the solinoid off and turn the starter, make sure battery it 100% charged first hope this helps