2001 F150, no 4X4L
#1
06-20-2003, 06:26 PM
Join Date: Jun 2003
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2001 F150, no 4X4L
2001 F150, xlt 4X4. I was driving down the highway pretty fast (65), and went to turn the a/c on. Instead I shifted the 4WD into 4X4Low. Now 4X4High works perfectly fine, but when I shift it into 4X4low, nothing happens (it remains in 4X4High). Could this be a simple fuse, or is there something that needs to be reset that is designed to protect the system from people like me? 
Cheers for any help that you could provide.
Cheers for any help that you could provide.
Last edited by sej; 06-22-2003 at 09:13 AM.
#2
06-21-2003, 06:14 AM
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It won't go into 4x4 low unless your in neutral movin slower than 3mph (or around that) and foot on the brake. It will go into 4x4 high though. When was the last time you used 4wd before this and when was the last time you used low? If it's been a while then it probably hasn't worked for a while. From what I've read here the electric motor that shifts the the tcase is known for failure. I'm not saying that's what is wrong here.
Yes checking the fuses is a good place to start. I have the MSOF, so no 4x4 by accident.
Yes checking the fuses is a good place to start. I have the MSOF, so no 4x4 by accident.
#3
06-21-2003, 07:40 PM
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Prior to this incedent, 4wd low and high worked perfectly fine. Now 4wd high works fine, but when I shift it into 4wd low nothing happens (it remains in 4wd high). This is not a major problem for me, as 4wd high is what I would normally use all the time, I guess I'm just thinking for down the road when I sell it. If I can find out what protects the system, hopefully something that can be reset, that would be real nice. I'd be happy 
if I could fix this.
if I could fix this.
#4
06-22-2003, 07:50 AM
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Well this is taken from my ford factory cd for my 97. I have no idea how much of this still applies to you 01 but I'm sure the general procedures are the same. Good luck. Also, is your 4low not working at all or just the light on the dash not coming on?
*Note this is quite long.*
Vehicle Not Switching Between 4WD HIGH and 4WD LOW Ranges Properly (Operates Correctly in 2WD to 4WD and 4WD to 2WD Modes)
Possible Source(s):
§ 4WD mode switch/circuit.
§ Neutral safety switch.
§ Brake switch.
§ Transfer case mechanism.
§ Transmission range (TR) sensor.
Action(s) to take:
§ GO to «Pinpoint Test B».
Pinpoint Tests — Electronic Shift on the Fly (ESOF)
PINPOINT TEST B: VEHICLE NOT SWITCHING BETWEEN 4WD HIGH AND 4WD LOW RANGES PROPERLY (OPERATES CORRECTLY IN 2WD TO 4WD AND 4WD TO 2WD MODES)
² B1: CHECK THE POWER OUTPUT FROM FUSE 15 (5A)
² B2: CHECK FUSES 15 (5A) and 22 (50A)
² B3: CHECK CIRCUIT 1052 (T/BK) FOR VOLTAGE
² B4: CHECK THE IGNITION STATES
² B5: RETRIEVE THE DIAGNOSTIC TROUBLE CODES (DTCS)
² B6: CHECK THE 4x4 INDICATOR
² B7: CHECK THE LOW RANGE INDICATOR
² B8: CHECK THE 4WD MODE SWITCH PID — 2H
² B9: CHECK THE 4WD MODE SWITCH PID — 4H
² B10: CHECK THE 4WD MODE SELECT SWITCH PID — 4L
² B11: CHECK THE 4WD MODE SWITCH — 2H
² B12: CHECK THE 4WD MODE SWITCH — 4H
² B13: CHECK THE 4WD MODE SELECT SWITCH
² B14: CHECK CIRCUIT 780 (DB) FOR OPEN
² B15: CHECK CIRCUIT 780 (DB) FOR SHORT TO GROUND
² B16: CHECK CIRCUIT 780 (DB) FOR SHORT TO POWER
² B17: CHECK CIRCUIT 682 (DB) FOR OPEN
² B18: CHECK CIRCUIT 682 (DB) FOR SHORT TO GROUND
² B19: CHECK CIRCUIT 682 (DB) FOR SHORT TO POWER
² B20: CHECK BRAKE ON/OFF (BOO) SWITCH PID
² B21: CHECK THE VOLTAGE TO THE BOO SWITCH
² B22: CHECK THE BOO SWITCH
² B23: CHECK THE CLUTCH INTERLOCK PID
² B24: CHECK THE TR SENSOR PID
² B25: VERIFY TR SENSOR
² B26: CHECK THE GROUND TO THE TR SENSOR
² B27: CHECK THE TR SENSOR
² B28: CHECK THE GROUND TO THE DIGITAL TRANSMISSION RANGE (DTR) SENSOR
² B29: CHECK THE DTR SENSOR
² B30: CHECK THE VEHICLE SPEED SENSOR (VSS)
² B31: CHECK CIRCUIT 676 (PK/O) FOR OPEN
² B32: CHECK CIRCUIT 679 (GY/BK) FOR OPEN
² B33: CHECK THE CIRCUITS BETWEEN THE GEM AND THE FUSE JUNCTION PANEL
² B34: CHECK THE CONTACT PLATE SWITCHES
² B35: CHECK THE CIRCUIT 771 (P/Y) TO THE CONTACT PLATE SWITCH A
² B36: CHECK CIRCUIT 771 (P/Y) FOR SHORT TO GROUND
² B37: CHECK CIRCUIT 771 (P/Y) FOR OPEN
² B38: CHECK CIRCUIT 771 (P/Y) FOR SHORT TO POWER
² B39: CHECK CIRCUIT 762 (Y/W) FOR SHORT TO POWER
² B40: CHECK CIRCUIT 762 (Y/W) FOR OPEN
² B41: CHECK THE CIRCUIT 770 (W) TO THE CONTACT PLATE SWITCH B
² B42: CHECK CIRCUIT 770 (W) FOR SHORT TO GROUND
² B43: CHECK CIRCUIT 770 (W) FOR OPEN
² B44: CHECK CIRCUIT 770 (W) FOR SHORT TO POWER
² B45: CHECK THE CIRCUIT 764 (BR/W) TO THE CONTACT PLATE SWITCH C
² B46: CHECK CIRCUIT 764 (BR/W) FOR SHORT TO GROUND
² B47: CHECK CIRCUIT 764 (BR/W) FOR OPEN
² B48: CHECK CIRCUIT 764 (BR/W) FOR SHORT TO POWER
² B49: CHECK THE CIRCUIT 763 (O/W) TO THE CONTACT PLATE SWITCH D
² B50: CHECK CIRCUIT 763 (O/W) FOR SHORT TO GROUND
² B51: CHECK CIRCUIT 763 (O/W) FOR OPEN
² B52: CHECK CIRCUIT 763 (O/W) FOR SHORT TO POWER
*Note this is quite long.*
Vehicle Not Switching Between 4WD HIGH and 4WD LOW Ranges Properly (Operates Correctly in 2WD to 4WD and 4WD to 2WD Modes)
Possible Source(s):
§ 4WD mode switch/circuit.
§ Neutral safety switch.
§ Brake switch.
§ Transfer case mechanism.
§ Transmission range (TR) sensor.
Action(s) to take:
§ GO to «Pinpoint Test B».
Pinpoint Tests — Electronic Shift on the Fly (ESOF)
PINPOINT TEST B: VEHICLE NOT SWITCHING BETWEEN 4WD HIGH AND 4WD LOW RANGES PROPERLY (OPERATES CORRECTLY IN 2WD TO 4WD AND 4WD TO 2WD MODES)
² B1: CHECK THE POWER OUTPUT FROM FUSE 15 (5A)
² B2: CHECK FUSES 15 (5A) and 22 (50A)
² B3: CHECK CIRCUIT 1052 (T/BK) FOR VOLTAGE
² B4: CHECK THE IGNITION STATES
² B5: RETRIEVE THE DIAGNOSTIC TROUBLE CODES (DTCS)
² B6: CHECK THE 4x4 INDICATOR
² B7: CHECK THE LOW RANGE INDICATOR
² B8: CHECK THE 4WD MODE SWITCH PID — 2H
² B9: CHECK THE 4WD MODE SWITCH PID — 4H
² B10: CHECK THE 4WD MODE SELECT SWITCH PID — 4L
² B11: CHECK THE 4WD MODE SWITCH — 2H
² B12: CHECK THE 4WD MODE SWITCH — 4H
² B13: CHECK THE 4WD MODE SELECT SWITCH
² B14: CHECK CIRCUIT 780 (DB) FOR OPEN
² B15: CHECK CIRCUIT 780 (DB) FOR SHORT TO GROUND
² B16: CHECK CIRCUIT 780 (DB) FOR SHORT TO POWER
² B17: CHECK CIRCUIT 682 (DB) FOR OPEN
² B18: CHECK CIRCUIT 682 (DB) FOR SHORT TO GROUND
² B19: CHECK CIRCUIT 682 (DB) FOR SHORT TO POWER
² B20: CHECK BRAKE ON/OFF (BOO) SWITCH PID
² B21: CHECK THE VOLTAGE TO THE BOO SWITCH
² B22: CHECK THE BOO SWITCH
² B23: CHECK THE CLUTCH INTERLOCK PID
² B24: CHECK THE TR SENSOR PID
² B25: VERIFY TR SENSOR
² B26: CHECK THE GROUND TO THE TR SENSOR
² B27: CHECK THE TR SENSOR
² B28: CHECK THE GROUND TO THE DIGITAL TRANSMISSION RANGE (DTR) SENSOR
² B29: CHECK THE DTR SENSOR
² B30: CHECK THE VEHICLE SPEED SENSOR (VSS)
² B31: CHECK CIRCUIT 676 (PK/O) FOR OPEN
² B32: CHECK CIRCUIT 679 (GY/BK) FOR OPEN
² B33: CHECK THE CIRCUITS BETWEEN THE GEM AND THE FUSE JUNCTION PANEL
² B34: CHECK THE CONTACT PLATE SWITCHES
² B35: CHECK THE CIRCUIT 771 (P/Y) TO THE CONTACT PLATE SWITCH A
² B36: CHECK CIRCUIT 771 (P/Y) FOR SHORT TO GROUND
² B37: CHECK CIRCUIT 771 (P/Y) FOR OPEN
² B38: CHECK CIRCUIT 771 (P/Y) FOR SHORT TO POWER
² B39: CHECK CIRCUIT 762 (Y/W) FOR SHORT TO POWER
² B40: CHECK CIRCUIT 762 (Y/W) FOR OPEN
² B41: CHECK THE CIRCUIT 770 (W) TO THE CONTACT PLATE SWITCH B
² B42: CHECK CIRCUIT 770 (W) FOR SHORT TO GROUND
² B43: CHECK CIRCUIT 770 (W) FOR OPEN
² B44: CHECK CIRCUIT 770 (W) FOR SHORT TO POWER
² B45: CHECK THE CIRCUIT 764 (BR/W) TO THE CONTACT PLATE SWITCH C
² B46: CHECK CIRCUIT 764 (BR/W) FOR SHORT TO GROUND
² B47: CHECK CIRCUIT 764 (BR/W) FOR OPEN
² B48: CHECK CIRCUIT 764 (BR/W) FOR SHORT TO POWER
² B49: CHECK THE CIRCUIT 763 (O/W) TO THE CONTACT PLATE SWITCH D
² B50: CHECK CIRCUIT 763 (O/W) FOR SHORT TO GROUND
² B51: CHECK CIRCUIT 763 (O/W) FOR OPEN
² B52: CHECK CIRCUIT 763 (O/W) FOR SHORT TO POWER
#5
06-22-2003, 08:20 AM
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Just to be clear, you are trying to put in 4L with the transmission in neutral, foot on the brake, and completely stopped right?
Electronic shift will not engage 4L if the truck is not in neutral.
I doubt inadvertantly putting the switch to 4L would have caused the problem, if there is a problem, it was probibly already there and this caused you to notice it.
Electronic shift will not engage 4L if the truck is not in neutral.
I doubt inadvertantly putting the switch to 4L would have caused the problem, if there is a problem, it was probibly already there and this caused you to notice it.
#6
06-22-2003, 08:22 AM
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OOOOPS!!! I guess I never had my truck in neutral, I figured it should engage in park. WoW!! Sorry for the run around and a big THANKS for the help.
pjf77, I was excited by all of that information and was getting ready to run out ot my truck with my meter in hand until I read dbarbee's post. Thanks anyhow!
pjf77, I was excited by all of that information and was getting ready to run out ot my truck with my meter in hand until I read dbarbee's post. Thanks anyhow!
Last edited by sej; 06-22-2003 at 09:16 AM.
