What's This?

[Vlad Soare]

Hello,

This black box with a white plunger is under the clutch pedal and is not affixed to anything, it's just dangling there.
What is it?

Thanks.

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[WD Pro]

My clutch pedal has a plunger at the top of it - I noticed it when I fitted the clutch spring.

Can you see another up there ?

WD

 

[Vlad Soare]

I see an electrical connector at the top of the pedal, which indicates there's switch there, but I can't see the switch itself, I don't know if it looks like a plunger or not.
Here's a better picture:

And a close-up showing what's inscribed on it:

The part number is HR3T-11A152-AA. A Google search for this part number reveals nothing relevant.

 

[WD Pro]

I will try and get you a photo of what my 2020 looks like in that area tonight

WD

 

[NoVaGT]

Curious; does everything work on the car? Can it be driven normally?

 

[Vlad Soare]

Oh, yes, no problem so far. Everything seems to work fine.
But I'm just curious as to what that might be. It looks strange just dangling there, not attached to anything, and having a plunger that's obviously never going to be pushed.
I suspected it might be the switch from the clutch pedal, but it can't be, because in that case the engine would not start, would it?

 

[Bikeman315]

It’s the clutch starter internal switch. It prevents the car from being started with the clutch engaged. Guessing it doesn’t belong on the floor.

https://www.ebay.com/p/227491636?ii...r-ffW7Z_4Vy1aVd9zKnsex7-S30wCd5QaAqYtEALw_wcB

What is a clutch start switch?
The clutch start switch is a member of the starting system. It's a safety device that prevents a driver from starting the engine with the clutch engaged. It's usually mounted on the clutch pedal assembly but may slide on the clutch master pushrod. ... Use a multimeter to diagnose the clutch switch and circuit.

Clutch Start Safety Switch - Free ASE Practice Tests

 

[Vlad Soare]

But the engine does start when I press the clutch pedal to the floor. And it doesn't start if I don't (it just turns on the accessory power, as expected). Everything seems to work as it should.
I also thought it might be the clutch switch, but the fact that the car worked normally made me doubt that.
Maybe there's a second, backup switch somewhere? And the engine starts if at least one of them is actuated?

 

[Bikeman315]

But the car does start normally when I press the clutch pedal to the floor. And it doesn't start if I don't (it just turns on the accessory power, as expected). Everything seems to work as it should.

Strange but considering it’s a Mustang not unexpected. Anyway it doesn’t belong on the floor. If you cannot figure out where it goes it’s back to the dealer.

 

[WD Pro]

Does rev match work ?

WD

 

[Vlad Soare]

Yes, rev match works perfectly (I adore that, by the way, best invention since sliced bread ).

 

[WD Pro]

Cruise ?

WD

 

[Vlad Soare]

Haven't tried that. Good point. I'll give it a try as soon as get the chance.

 

[Bikeman315]

Haven't tried that. Good point. I'll give it a try as soon as get the chance.

This might be it!

https://www.mustang6g.com/forums/threads/clutch-safety-switch-picture-request.97303/

 

[StangTime]

That's the CPP switch. It disengages cruise control when you press the clutch in.

Here is where it is mounted:

Note the orientation is rotated 90 deg from the 2016 service manual, but this shows where it goes.

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