Overdrive is controlled by engine coolant temp and not trans temp. I made this error in the past but was corrected.
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Couple of questions. My '94 FSM shows the TCM behind DS kick panel. Was this where you found the module? Also, 1st post by @ThreeEyedBandit (who can also reply to these questions) in this thread mentions the pins modified are on connector 'B'. The schematics in the back of my FSM show the pins to be in connector 'C'. Looks like according to the schematic pic of the connectors, there's 2 connectors - 'C' and 'D' that plug into the bottom of the TCM. The larger 22 pin connector 'C', and a smaller 12 pin connector 'D'. Does this sound like the animal that gets modified?Did this mod the other day, great to be able to turn off the ECT (power mode) at will when in low range, when the power mode is off it makes the shifts from 1st to 2nd really smooth when moving really slow in low. It's pretty easy to do. Thanks to the OP.
Cheers
This is the full page in my FSM concerning the TCMMy 94 FSM shows that it is on the B connector, post a picture of each page of the EWD and we'll get this sorted.
Also, my TCM was under the steering column, not what I would call the kick panel.
CorrectSo in other words it does for the shift points the same thing that cdl switch + pin 7 does for the center lock, putting 100% of the operation in the switch itself
Got it, thanks! Is there anyway to retain the factory function of the ect modes, especially in high range?Your TCM is part of the ECU, I would have to find a FSM to figure out where thy put it for sure.
Correct, now the switch controls the map selection entirely. Button on, low range map in either high or low range and button off is high range map in either. You will loose the functionality of the ECT switch's factory function.
Simply without adding a second switch, no. You can hard wire it to always be on or off easily. I might look at the EWD to see how difficult it would be to tie into the H/L switch.Got it, thanks! Is there anyway to retain the factory function of the ect modes, especially in high range?
That would be ideal to have it on all the time, and then select the mapping manually with the switch. Thanks for your help!Simply without adding a second switch, no. You can hard wire it to always be on or off easily. I might look at the EWD to see how difficult it would be to tie into the H/L switch.
Just digging around and it seems like the yellow wire in this thread connects to the 4L position switch that switches the transmission mapping from H to L - disconnecting it seems to keep it in H mapping since it never gets the signal back from the transfer case that it’s now in L. Seems like you could trace this line and put a switch on it if you wanted H mapping while shifted into L.Simply without adding a second switch, no. You can hard wire it to always be on or off easily. I might look at the EWD to see how difficult it would be to tie into the H/L switch.