No Power to Starter Relay - 2007 FX4 4.0 SOHC
No Power to Starter Relay - 2007 FX4 4.0 SOHC
So I've recently just put in a new engine and I'm getting nothing, not even a click from the relay (relay works). I've connected 3 ground wires located by: ECU/PCM, ~Brake booster to head, Starter stud. I've been using the pinpoint test from the factory manual: https://charm.li/Ford/2007/Ranger%20...20Not%20Crank/
By that manual I'm on A6. The idle voltage between starter stud ground and S terminal is ~6-8 mV then when I put the ignition to start it goes to ~1.x mV. I've cleaned the contacts, verified there is continuity between the S connector terminal and fusebox, verified that the correct shift point is being outputted from the transmission via scanner to satisfy the neutral safety switch (wont start in P or N). There is a whine for a second or two when I put it to START which I first thought was the fuel pump, but wouldn't it prime at ignition on? Clearly there is something I'm missing and I hope that one of y'all can point me in the right direction because electrics is not my strong suit.
By that manual I'm on A6. The idle voltage between starter stud ground and S terminal is ~6-8 mV then when I put the ignition to start it goes to ~1.x mV. I've cleaned the contacts, verified there is continuity between the S connector terminal and fusebox, verified that the correct shift point is being outputted from the transmission via scanner to satisfy the neutral safety switch (wont start in P or N). There is a whine for a second or two when I put it to START which I first thought was the fuel pump, but wouldn't it prime at ignition on? Clearly there is something I'm missing and I hope that one of y'all can point me in the right direction because electrics is not my strong suit.
Last edited by pompano; Mar 10, 2026 at 09:25 PM.
You folks may want to post your issues to the forums for your engine size. They're at the bottom of the list of forums.
Pompano: By starter relay you're refering to the relay that mounts to the side of the engine bay and gets power (+volts) from the battery and from the ignition switch? That's a simplified description, I know there are fuses and safety switches in between. At the relay you have +12v from the battery (always?) and +12v from the ignition switch when the key is turned to start?
Pompano: By starter relay you're refering to the relay that mounts to the side of the engine bay and gets power (+volts) from the battery and from the ignition switch? That's a simplified description, I know there are fuses and safety switches in between. At the relay you have +12v from the battery (always?) and +12v from the ignition switch when the key is turned to start?
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slambox28
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Dec 8, 2023 03:31 PM



