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Re: the f150 93 truck won't crank unless relay is jumped
I had this problem on my F250. I actually just ended up putting in a switch that by passes the relay and brings power directly to ignition. Turn off switch so you dont drain battery, and turn on switch to start car.
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wont crank or wont start.?? no car starts , if it cant crank. (unless push starter (M/T magic) that is not a trans sensor its the PRN switch. ill answer for, wont CRANK ! it wont crank even with a good battery (charged) or jump started. 1: bad start 2: bad wires to same. so hot wire the starter small wire, the key start line is tiny. cranks. , starter good, no crank starter bad or cables bad. if it cranks hot wired, then the key line is dead. easy, huh?
The ignition start circuit is the path from the ignition key in cranking mode to the solenoid on the starter. The path travels through a starter relay and a neutral safety switch before it reaches the starter.
This must be the circuit not working on your car.Make sure battery and starter connections are tight.Check for power at the starter solenoid terminal with a testlight when someone turns key to crank. If you have power there, they sold you a defective starter. If you have no power there then it could be the relay or the neutral safety switch.
Hi, if the car engine fails to crank, there is a fault in one of the components in the battery/ignition/starter circuit. Low battery (Check battery voltage, recharge if low, or jump start with another vehicle or battery charger). Bad starter relay/solenoid (Check for
voltage at relay, if relay has voltage but there is no "click" when key
is turned to start, replace relay). Bad ignition switch (Check to see if
voltage reaches starter relay/solenoid when turn to start. If not,
check for open P/N switch and brake or clutch pedal switch. Replace
ignition switch if defective).
If the switch (neutral safety switch) is broken, it will not crank regardless whether you jump the battery or a new battery is installed. I don't have specific manual for your year that's why my advice is as in general. With a remote starter tool, bypassing the solenoid wire with remote starter which is connected to the positive terminal of the battery of it's other end. Once positive current flows from the battery, through the remote switch, flowing towards the solenoid, the starter should engage indicating a bad wiring harness connection from ignition switch. If it doesn't crank at all you may have a bad starter assembly and needs replacing. If your starter is clicking using it's own battery power, your battery is low of charge or your charging system is malfunctioning.