Raptor shift light off of PCM feed

Fordbanger

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Good info I know the pcm method works with anything requiring a cto. Don't know if that is the same with the coil wire hook up.


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91svtcoupe

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Anyone know for sure if a msd window switch will work connecting to the pcm connector on an 05?

I know the 07-up has a tach out put but haven't seen anything on the 05-06 for sure

Also has anyone thought or do u know if there is a wire going to the obd plug that has a tach signal?

I wander about this because my aeroforce gauge reads rpm spot on....maybe there is something in the gauge but it has to read some signal from that port and I would assume the wires going to that port transfer those signals. ...my aeroforce works great for a digital tach when I want to read it that way and ive set my shift light up in it ans it has been working without any issues
 

lito

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Good info I know the pcm method works with anything requiring a cto. Don't know if that is the same with the coil wire hook up.

Is not, the CTO is an actual 8 cyl signal (4/rev) with the coil wire, it is 1 cyl (0.5/rev) frequency is very low, for a shift light, no biggie, it only needs to read higher freq/revs but for other things, not good, if you get to monitor that, at idle is all over the place.

Anyone know for sure if a msd window switch will work connecting to the pcm connector on an 05?

I know the 07-up has a tach out put but haven't seen anything on the 05-06 for sure

Also has anyone thought or do u know if there is a wire going to the obd plug that has a tach signal?

I wander about this because my aeroforce gauge reads rpm spot on....maybe there is something in the gauge but it has to read some signal from that port and I would assume the wires going to that port transfer those signals. ...my aeroforce works great for a digital tach when I want to read it that way and ive set my shift light up in it ans it has been working without any issues

No CTO on pre-07, the aeroforce uses actual PCM's CAN data.
 

91svtcoupe

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Is not, the CTO is an actual 8 cyl signal (4/rev) with the coil wire, it is 1 cyl (0.5/rev) frequency is very low, for a shift light, no biggie, it only needs to read higher freq/revs but for other things, not good, if you get to monitor that, at idle is all over the place.



No CTO on pre-07, the aeroforce uses actual PCM's CAN data.

So no real good source for a tach signal unless u get a tach adapter then or purchase the digital window switch and correct the setting after tapping into the cop wire


On my 06 back when I purchased it new...I used a wire in the passenger side floor board kick panel aera but I cant find any info on that now....it seemed to work fine? Can u provide any information on what I may have tapped into there?
 

Fordbanger

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Is not, the CTO is an actual 8 cyl signal (4/rev) with the coil wire, it is 1 cyl (0.5/rev) frequency is very low, for a shift light, no biggie, it only needs to read higher freq/revs but for other things, not good, if you get to monitor that, at idle is all over the place.







No CTO on pre-07, the aeroforce uses actual PCM's CAN data.


At idle speed mine holds at the desired rpm. Also have used it for a window activation switch. Which didn't activate until 2000 Rpm's. So maybe that's reason it seems reliable for my source use. Good info though i will defiantly keep this in mind.


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