yo Mikko
You'll have to go back to that Four Wheel Drive (4X4) General Information, Operation & Troubleshooting TSB 92-1-8 for 92 & Prior Year Bronco, F Series & Ranger (COMPLETE); Includes Electric Shift On The Fly (ESOF) Troubleshooting after 92 Source: by Ford via Chilton
same for 87-96; exc for that in 87; power from Fuse 6 (15 amp) to "ELECT SHIFT CONTROL MOD" WHT-PPL and CB 12 (30amp) to "ELECT SHIFT CONTROL MOD" BLK-WHT; SEE A7 and A8 in the 4x4 diagram, it shows those two wires BLK-WHT as BK/W from SHIFT MODULE to P1 BATTY and and WHT-PPL as W/P to P2
go to
If the vehicle won't shift into 4L, check the speed sensor and the transmission interlocks (neutral or clutch in). Also check the 4L switch (C3) to see if the module is getting a signal. Be sure to check for corroded connections.
So, read this:
The 1356 Electric Shift Speed Sensor Replacement Information & in an 89; "Problem: 4wheel
LOW was not working. I only got the blinking LOW light when I selected it. Sometimes it would work, but rarely, and without warning. The bigger problem would be when I would try to disengage it and it would not work. Then I'm stuck in LOW. 4 HIGH worked fine.
...took about 45 minutes to remove the yoke, tail housing, and solder/splice/heat shrink the new sensor in place
Lo and Behold my speed sensor was showing about 5 megaohms. I grabbed one from a junkyard and it measured 283 ohms. Swapped them out and it works beautifully!
Free fix, and it took about 45 minutes to remove the yoke, tail housing, and solder/splice/heat shrink the new sensor in place.
I attached a picture of what the sensor looks like when it's out.
BTW the sensor I got from the junkyard came out of a Bronco 2 I think...or maybe a Ranger. I forget, but I kinda took a gamble. It looked the same, and had the same color wires. Either way, it only had one bracket holding it in place, instead of a Bronco/F series BW1356 that requires the removal of part of the transfer case. It's much easier to get when you're in a junkyard..."
Source: by kf4amu
Miesk5 Note Ford Part Number is 7f293, speed sensor
Here is is on the 1356 courtey of drinkbrew;