cardana24
Well-Known Member
- Joined
- Aug 28, 2008
- Messages
- 78
- Vehicle Year
- 1990
- Transmission
- Automatic
Hey guys,
I picked up a 1994, ranger 4x4, manual, 4.0 a few months ago. When I bought the truck the 4x4 was not working, you would push the 4x4 button and nothing would happen. So I searched around and saw a bunch of people have had trouble with the shift motor. So I took that apart and cleaned it. Once I did that and put it back on the t/c the 4x4 would engage. So I was smiling thinking I had fixed it. Well over the weekend I thought I would test it out. I am getting no engagement again. The light does not come on, on the dash and the 4x4 is not engaging. So I started going through this thread http://www.therangerstation.com/tech_library/4wd_control_module.html
My module blinks when I push the white button on the top of it. All of the tests for the switch check out. I have continuity between the wires from the 4x4 module and the shift motor. But I don't think the 4x4 module is passing the signal to the shift motor. I am not able to get 12v at the connector going to the shift motor and I am not sure why.
I did not do this section of the diagnostic
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 Wire Color 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 Wire Color P/Y Short Short Short Short Open Open Open Short Short
Pin 5 Wire Color W Open Open Open Open Open Short Short Short Short
Pin 6 Wire Color BR/W Short Short Open Short Short Short Short Short Open
Pin 7 Wire Color 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).
I was not really sure I was checking it right. Can anyone help me with this problem? When I opened up my shift motor I do not have any sort of bushing around the stop on the shift motor wheel. But mine is also a peg, it does not have a screw head like I have seen in some pictures so I don't think it is missing anything but I am not positive. Let me know what else I need to answer for you all so I can get this thing working again. Thanks.
I picked up a 1994, ranger 4x4, manual, 4.0 a few months ago. When I bought the truck the 4x4 was not working, you would push the 4x4 button and nothing would happen. So I searched around and saw a bunch of people have had trouble with the shift motor. So I took that apart and cleaned it. Once I did that and put it back on the t/c the 4x4 would engage. So I was smiling thinking I had fixed it. Well over the weekend I thought I would test it out. I am getting no engagement again. The light does not come on, on the dash and the 4x4 is not engaging. So I started going through this thread http://www.therangerstation.com/tech_library/4wd_control_module.html
My module blinks when I push the white button on the top of it. All of the tests for the switch check out. I have continuity between the wires from the 4x4 module and the shift motor. But I don't think the 4x4 module is passing the signal to the shift motor. I am not able to get 12v at the connector going to the shift motor and I am not sure why.
I did not do this section of the diagnostic
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 Wire Color 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 Wire Color P/Y Short Short Short Short Open Open Open Short Short
Pin 5 Wire Color W Open Open Open Open Open Short Short Short Short
Pin 6 Wire Color BR/W Short Short Open Short Short Short Short Short Open
Pin 7 Wire Color 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).
I was not really sure I was checking it right. Can anyone help me with this problem? When I opened up my shift motor I do not have any sort of bushing around the stop on the shift motor wheel. But mine is also a peg, it does not have a screw head like I have seen in some pictures so I don't think it is missing anything but I am not positive. Let me know what else I need to answer for you all so I can get this thing working again. Thanks.