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Power Strokes
7.3 Aftermarket
Auto PCM with no Auto...
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[QUOTE="Charles, post: 1293964, member: 103"] Finally had time to dick with this. Not knowing what resistance value ford might have used for the pull-up resistor in the pcm for TFT, I had to study the ford temp sensors and came up with a resistance value between 4 and 6 kohm in the 150ish degree range. So I placed a 5 kohm resistor between pins 7 and 8 on the transmission solenoid pack connector and voila..... the manual trans pcm finally stfu about a coolant temp that no other 7.3 computer ever gave a solitary *** about in the first place... Problem is, as suspected, the TFT dash gauge is now dead with a constant "check gauge" light next to it. Now I have to locate the input to this, decipher what mode it is and see if maybe the PCS can feed it, which would be awesome because the pos might actually be useful instead of just another idiot gauge doing no good on the dash. On Edit: I initially configured a 10k pot with a couple 10k resistors stacked so I could simply vary the resistance on the TFT wire until 150 to 160 degrees was noted through the scanner, but alas..... the trans temp is an idiot gauge, and therefore, even though I could see the input voltage changing on the scan tool, the PCM always output 60 degrees as the TFT anywhere from around 2 volts to nearly 3.5 volts I was able to vary through. So forget picking a resistance value that way.... [/QUOTE]
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