- 235
- 562
- 93
- Location
- Strafford, NH
Bummer, I hope that cable shows up quickly for ya.
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Just circling back on this point, according to the A1 schematic, the ECM is fed with 24v. I am assuming you were successful doing it with 12v and that is what I will try first, but this is interesting.The ECM can stay on the engine. It is 12v. Only equipment (excavator, etc) are 24v. If in doubt putting 12v to a 24 system won't hurt it, it just won't power on. Put 24v on a 12v circuit and it will work great for a brief moment.![]()
or is that just denoting the two 24v items out of the rest of the 12v ECM considering up above this there is a battery Pos and Neg feed into the ECM. with no voltage notation at all.... but one would assume a vehicle to usually be 12v..... those no notation needed???Just circling back on this point, according to the A1 schematic, the ECM is fed with 24v. I am assuming you were successful doing it with 12v and that is what I will try first, but this is interesting.
View attachment 884613
or is that just denoting the two 24v items out of the rest of the 12v ECM considering up above this there is a battery Pos and Neg feed into the ECM. with no voltage notation at all.... but one would assume a vehicle to usually be 12v..... those no notation needed???
make sure to trace the other Pos and Neg to see where it goes as well... could well be the 24v connection is only a "sensing" thing the ECU uses to determine what ECU should do when there is/is not 24v. Its presence does not mean it powers the ECU. Pretty sure we do know it powers the TCUI just snipped out the connector part of the schematic to keep the picture small, but if you trace those all the way out they all end up at either +24 BATT or +24 Ignition(via circuit breakers). I will also use a volt meter at the truck connecter when I disconnect it for the bench flash just to confirm.
waitttt.???. what???. you sure you got the right info here?????. there is a "CLUTCH PEDAL switch" in that list!!!!!Just circling back on this point, according to the A1 schematic, the ECM is fed with 24v. I am assuming you were successful doing it with 12v and that is what I will try first, but this is interesting.
View attachment 884613
What Cat Lists for those pins matches what the S&S schematic says. Which pin number were you suspecting was wired to +12 because I don't see any other pins wired to power in the schematic, they are all inputs and outputs.make sure to trace the other Pos and Neg to see where it goes as well... could well be the 24v connection is only a "sensing" thing the ECU uses to determine what ECU should do when there is/is not 24v. Its presence does not mean it powers the ECU. Pretty sure we do know it powers the TCU
Like I said, I was trying to keep the pictures small. The full schematic is available for download if someone wants it, as you can see from the snip, Clutch is wired to PTO input further down the harness. ECM must use the clutch input for some part of its PTO programming.waitttt.???. what???. you sure you got the right info here?????. there is a "CLUTCH PEDAL switch" in that list!!!!!
gotcha.... miss read those two as one Pos and other Neg.What Cat Lists for those pins matches what the S&S schematic says. Which pin number were you suspecting was wired to +12 because I don't see any other pins wired to power in the schematic, they are all inputs and outputs.
View attachment 884638
The invoice has it as “194-6722 SENSOR GP-PR”Do you have the part number for the barometric sensor? I'm glad you got it working again. The 330hp really wakes it up!
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