more 4x4 troubleshooting woes

[hifonic200]

I know there are 1000 4x4 threads on here, but I cant really find one with the answers I need

sorry if this is repeat content

Ok, little confused on the trouble shooting of my 4x4 system

Back up a bit…nothing happens when the 4x4 button is pushed….absolutly nothing, no clicking noise, lights, ect ect

I checked fuses, all good

Did the self diagnostic test on module, 4 blinks from the led, all good there

This is where it gets fuzzy for me

Is the next step to check to see if shifting motor is getting voltage or check the sensors first?

And where do I find these sensors, im assuming on the transfer case

Also, im assuming this is the shifting motor being refered to (see picture)

what are some of the procedures you went through with the same issues...thanks in advance

 

[miesk5]

yo,

Take time to Read this

Four Wheel Drive (4X4) General Information, Operation & Troubleshooting TSB 92-1-8 for Bronco, F Series & Ranger (COMPLETE); Includes Electric Shift On The Fly (ESOF) Troubleshooting & Hub Operation; 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 Source: by Ford via Chilton

Troubleshooting begins @ Page 8

voltage checks are at the Tranfer Case's electronic control module for P! & P@ and at Control Switch Pin 8 as described;

P1 = ESOF Module Pin A8

P2 = ESOF Module Pin A7

P3 = Electronic Shift Control Switch Pin 8

Power In

Power is supplied to the system at 3 points:

P1. This is a direct connection to the battery. This power drives the electric shift control motor and provides current to the instrument cluster lamps. This circuit goes to ground G1.

P2. The electronic shift control module is tied into the ignition circuit. This circuit provides power to the computer and goes to ground G2.

P3. Nighttime illumination is provided by a connection to the vehicle's nighttime illumination circuit, which goes to ground G3.

read on..

Common issues are;

Motor's Internal travel stops break when shifting from 4wd to 2WD

1356 Electric Shift Motor Troubleshooting & Repair (travel stops) Source: by Richard C (Bigric, Money Pit) at SuperMotors.net

1356 Electric Shift Motor Typical Failures & Prevention; "...Most units fail because of water or mud intrusion. Carefully inspect motor boot or protective coverings. Be sure connector seals can keep water and debris out. Check wiring harness and connector. Replace or repair wiring as necessary. After installation, periodically select 4-wheel drive mode to ensure operation when needed..."

Source: by CARDONE®

ask more if needed