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If it works then your starter relay is bad.
If it doesn't next step is to bypass/jump the starter solenoid itself.
NOW this is where you want to be careful, lots of amperage when starting a motor.
What you do is bridge the 2 big connectors on the solenoid with a screwdriver.
Your screwdriver becomes the 'switch' as it were.
This is why you have to be careful, use an insulated screwdriver and don't leave it on there long or it might weld itself to the terminals. Bad!
Another option again is to bring 12v straight from battery+ to the starter terminal.
You're basically powering the starter straight from battery with nothing in between, so use caution, a heavy gauge wire, and a good battery.
There will be sparks and you might get some juice.
Also turn you ignition switch to ON and make sure your truck is in Neutral.
And since you have a manual, you need to press the clutch pedal or it won't start, so maybe ask a helper.
Which makes me think maybe it could be the neutral safety switch. I think on our manuals it's a clutch pedal position sensor so you'd have to look there.
There's also a neutral position sensor on the transmission but I don't know if that's part of that circuit.
Last edited on Tue May 14th, 2019 05:10 pm by Arthur
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2008 XLT 4x4 4.0 5Spd. Pretty much stock except 33's and Bilsteins: A bit broken for now.
2007 FX4 Level II auto: new project!