Cruise only works when I hold the “set” button down
#16
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Join Date: Dec 2017
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Year: 1989
Model: Comanche (MJ)
Engine: 4.0
That PCM definitely isn't a 2007. :}
You might be onto something with the PCM needing to be for a manual, but I can't see what would be different looking at the wiring. I don't see an input for a clutch or neutral switch. There is an input for the brake switch on pin 29, but I would assume it wouldn't engage at all if it thinks the brake is applied. You verified pin 29 changes voltage with the brake pedal?
You might be onto something with the PCM needing to be for a manual, but I can't see what would be different looking at the wiring. I don't see an input for a clutch or neutral switch. There is an input for the brake switch on pin 29, but I would assume it wouldn't engage at all if it thinks the brake is applied. You verified pin 29 changes voltage with the brake pedal?
#17
Senior Member
Thread Starter
That PCM definitely isn't a 2007. :}
You might be onto something with the PCM needing to be for a manual, but I can't see what would be different looking at the wiring. I don't see an input for a clutch or neutral switch. There is an input for the brake switch on pin 29, but I would assume it wouldn't engage at all if it thinks the brake is applied. You verified pin 29 changes voltage with the brake pedal?
You might be onto something with the PCM needing to be for a manual, but I can't see what would be different looking at the wiring. I don't see an input for a clutch or neutral switch. There is an input for the brake switch on pin 29, but I would assume it wouldn't engage at all if it thinks the brake is applied. You verified pin 29 changes voltage with the brake pedal?
And no, I haven’t checked pin 29 yet. Only reason why is because it engages if I hold the button down and will disengage if I press the brake pedal while holding the button down. But if I let off the button nothing works
#19
Senior Member
Thread Starter
Well, I had some free time today to test the servo. As per the instructions in 8H, I jumped pin 2 from the connector to pin 2 of the servo and tested for battery voltage at the other pins. I couldn't find any voltage at all 3 pins, and I could only find battery voltage at pin 2. I tested pin 1 for a short circuit to ground, and it's not shorted to ground. I don't know why I can't find battery voltage at pins 1,3,4, and this makes me think that maybe the servo I got was defective.
Any inputs?
Any inputs?
#20
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Join Date: Jan 2014
Location: Eustis, Florida
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Year: 1996
Model: Cherokee (XJ)
Engine: 4.0
A few years back I ended up replacing my PCM.
I sourced it from Flagship One and they flashed it to my miles and vin.
here is a link https://www.fs1inc.com/
hope this helps
I sourced it from Flagship One and they flashed it to my miles and vin.
here is a link https://www.fs1inc.com/
hope this helps
#21
Senior Member
Thread Starter
That’s who i’m gonna buy from, eventually. Just need to get some things in order before I buy it.
And I’m honestly surprised that they have one for my manual 2.5. I can’t find that one anywhere else online
And I’m honestly surprised that they have one for my manual 2.5. I can’t find that one anywhere else online
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