4x4 not working
#1
4x4 not working
I have an 02 F250 with the ESOF 4x4x switch. In the past year it has been off and on working, low range has never worked...today it finally quit working. I put it in N and switched to 4 high light came on then switched to 4 lo 4x4 light went out no 4 lo light or no 4x4, never did get it to work. Reason for my thread is what can I test before buying a new transfer motor. I did try tapping it with a hammer, unplugging/plugging the connector for it though.
Thanks
Thanks
#4
#5
#6
X2 to what SARDiverDan said. Mine didn't work when I bought it 2 years ago, and I put manual lockers on it and haven't had probs with it. There's a how to write up on the forum (don't remember where, but it's almost a plug and play kind of thing)someone will chime in and tell you where it is.
#7
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#8
You can also just unplug a vacuum line and then turn the key on to see if the pump is working.
#9
Mine are here:
Check for continuity between 87a and 30 with relay non-operated and 87 and 30 with relay operated. These relays operate x-fer case shift motor to shift to 4x4 high and 4x4 low. A vacuum leak will not affect the shift motor, but will cause the non-engagement of an auto hub.
#10
Do these trucks have an open transfer case or what? My pickup has never shown to have even a slight advantage in 4WD. Case in point, at the boat ramp, I put it into in 4WD to pull of ramp into the mud...only one back tire spun when I hit the mud. I have noticed that the hubs are clicking in and everything is working properly, do these trucks not have a proper "4WD" system or what? My older Nissan pickup with a locking transfer case will out perform this rig all day long, what the heck? Don't get me wrong, I love the powerstroke power baby, yeeehaaaawww!!!!! Just want a good hunting truck with class, haha.
#11
The vacuum pump is on the right inner fender. If you have a leak you should here it run in the A.M. after you turn the key on. I had a gray vacuum line coming out of the firewall and the end was floating and causing a leak. If I am understanding correctly, with manual HVAC this line is plugged off. I plugged mine to a pin on the AC dryer, I think.
You can also just unplug a vacuum line and then turn the key on to see if the pump is working.
You can also just unplug a vacuum line and then turn the key on to see if the pump is working.
#12
No. I am not sure what the quick little "ROMP" is.
If you have a leak,the vacuum tank will empty itself without electrical power. Go by the Picture above and listen there.
I am sorry. the picture is of the relay, the pump is on the other side.
If you have a leak,the vacuum tank will empty itself without electrical power. Go by the Picture above and listen there.
I am sorry. the picture is of the relay, the pump is on the other side.
Last edited by hammer65; 01-16-2012 at 05:14 AM. Reason: error
#13
Do these trucks have an open transfer case or what? My pickup has never shown to have even a slight advantage in 4WD. Case in point, at the boat ramp, I put it into in 4WD to pull of ramp into the mud...only one back tire spun when I hit the mud. I have noticed that the hubs are clicking in and everything is working properly, do these trucks not have a proper "4WD" system or what? My older Nissan pickup with a locking transfer case will out perform this rig all day long, what the heck? Don't get me wrong, I love the powerstroke power baby, yeeehaaaawww!!!!! Just want a good hunting truck with class, haha.
#14
408W: Check out the first line on this page under maintenance tips. Jim
Powerstroke Mods and Maintenance
Powerstroke Mods and Maintenance
#15