Another electric Tcase post

[conejo]

I just recently bought a bronco II and after I brought it home the 4x4 quit working. I didn't have a clue where to start till I found this forum, The trouble shooting guide at the top of the page is a godsend. I have went through it and discovered that my switch was bad. I bought a new one and still nothing! I get power to the motor for a second when you push the switch then nothing! Any ideas on what to check next?

 

[actbubba]

Could be a bad shift motor...

 

[kevinsranger]

did you do the check on the 4x4 control module with the little red light? also if it helps, i took my dash switch off and cleaned it and its been working perfectly ever since.

 

[conejo]

I've checked everything on the list except for this part of it, which I don't understand.

c. Connect an ohmmeter between terminal 8 (yellow/white) and terminals 4 (violet), 5 (white), 6 (brown/white) and 7 (orange/white), respectively. Refer to the following chart for the appropriate ohmmeter readings in each transfer case position.


OHMMETER READINGS FOR SHIFT MOTOR POSITION SENSOR
Pin 8 Y/W To: TRANSFER CASE MOTOR POSITION
2 High Edge 1 2H-4H Edge 2 4 High Edge 3 4H-4L Edge 4 4 Low
Pin 4
P/Y Short Short Short Short Open Open Open Short Short
Pin 5
W Open Open Open Open Open Short Short Short Short
Pin 6
BR/W Short Short Open Short Short Short Short Short Open
Pin 7
O/W Open Short Short Short Short Short Open Open Open


NOTE: Edge positions and Mid-Shift positions are valid motor codes that the module will respond to; however, any motor found in one of these positions should be replaced/torn apart and cleaned/inspected to prevent the overshooting of shift points.
SHORT is a "low" resistance reading on the ohmmeter (zero ohms).
OPEN is a "high" resistance reading on the ohmmeter (infinity).

 

[Ranger44]

I would clean the shift motor.

 

[conejo]

I already did that. I am not getting power down to the motor except for the first second you push the button