I have a 2006 XLT w/ the 5.4L engine. Manual transfer case, I'm wondering where to start looking for problems w/ the 4x4...the front wheels don't engage.
View 3 Replies2006 Lariat 4x4 Troubleshooting. My front wheels wont engage when I select 4H or 4L. No dash lights are ever lit.
I read up and understand how the system works and plan to replace the solenoid, transfer case motor and both hub actuators. I swapped out the solenoid and wanted to test that it was functioning properly so I followed the video below:
YouTube........
With the engine running and selector switch at 2WD, I pull the vacuum lines off and can feel vacuum at the supply. I then hook up just the supply line up (to the bottom port) and expect to feel vacuum at the other solenoid port (top port - what I would call the outlet) and cannot feel any vacuum.
This has halted my repair attempts as I am not convinced this is functioning and would pull in the actuators if they were functional. I know it's a small vacuum from a small orifice but I would think I should feel it by hand, no?
The solenoid's electrical connector is plugged in during this as well. I get the same performance with the old solenoid and the new. If I bypass the solenoid I can feel vacuum at the front wheel hubs.
Should I try a third solenoid? Seems unlikely I would have 2 bad ones...No OBDII codes at all. What to try next?
I have a 2005 KR that the 4wd doesn't lock in the front wheels. I haven't seen my exact problem as I have been searching it. When I turn the switch. The dash lights both in high and low 4wd. I hear the transfer motor engage in both hi and low. No ratcheting noises from the wheels. I have replaced the solenoid. And still nothing. Checked fuses And they are OK.
View 3 RepliesI just recently bought a used 2004 fx4 with 148k and everything appears to be engaging but front wheels not pulling. I've already replaced the IWE solenoid behind the battery to avail, my question is, when I put it in 4H, light comes comes on, but I don't "feel" the transfer case engage, when I put it in 4L, light on I feel it shift. So could the shift motor not be engaging the front driveshaft even though the lights come on?
View 10 RepliesI have a 2006 F-150 4x4 and the 4x4 quit working, it gives me a P1867 & P1891 code but my scanner don't tell me possible causes. Where to start looking?
View 3 Replies2004 fx4, transfer case engages, but front wheels won't engage. I assume the vacuum solenoid is stuck, any other thoughts?
View 1 RepliesI have an intermittent grinding noise coming from what sounds like both front wheels, it sounds like metal on metal almost like something metal rubbing the rotor but I just put new pads on and the noise was there before as well with nothing touching the rotors but the pads. The sound will appear out of no-where at low speeds of 35 or below and will continue until I brake and slow down, just before I come to a compete stop the noise will stop with a slight clunk.
I can then drive away with no noise. I am pretty sure it is not brake related except maybe ABS somehow but was also thinking front axle or diff, also have read posts that are bearing related, but both at the same time?. It is the slight clunk before stopping that I can not figure out is related to. It is an 05 f150 xlt 5.4 super cab 4wd with 85k miles
I have a 2005 f150 and it will not engage the front hubs. It is a manual shift on the fly not electric. I have done some checking and this is what i have found so far. Pull the lever into 4H, dash light comes on, IWE's do not lock onto axle. Same for 4L. The transfer case does come in when lever is pulled into either 4H or 4L. Front end up on jack stands, engine off. Turn either wheel and axle turns with it as it should. Start engine, turn either wheel and it is free from axle, as it should be. so there is vacuum going to IWE when engine is on. Not sure what to check next. Is the vacuum solenoid on the firewall bad?? Is there something not getting activated when i pull the floor lever back?
View 4 RepliesI have a 2004 FX4 4x4 ... Four wheel drive is not working!!!!! Turn the dash switch to 4High or 4Low and the lights come on in my dash gauge cluster. So my 4x4 lights come on as if the 4x4 is working but my front wheels do not turn. What I have done:
Drove the truck forward while I watched the front drive shaft going from the transfer case to the front differential. Did this in 2WD and then in 4WD high. While driving forward in 2WD the front drive shaft did not move. Once put into 4WD high and driven forward the front drive shaft was turning. I guess this tells me that my transfer case and shift motor are working?
I jacked up my driver side front wheel and turned the tire by hand while the truck was running in 2WD. The tire spun freely and the CV axle (half shaft) did not turn. Then turned 4x4 dash switch to 4WD high and turned the tire again by hand and the CV axle turned while turning the tire. I guess this indicates that the IWE actuator was working....I guess???
Repeated the process above for the front passenger side of the truck and the tire would always spin freely regardless if in 2WD or 4WD. I could not get the CV axle to turn while spinning the tire on the passenger side when the truck was running and switched to 4WD
I checked the vacuum solenoid near the battery mounted on the firewall. The vacuum line supplying vacuum to solenoid was working and pulling vacuum. I did a series of test in conjunction with the dashboard 4x4 selector and the Vacuum Solenoid seemed to be working properly.
Crawled under the truck while the engine was running and pulled the vacuum line off the nipples of each IWE Actuators (drive and passenger side) put my finger over the lines and felt decent vacuum at each end of each vacuum line.
So dash switch and 4x4 light works stays on solid and bright does not flicker
Vacuum solenoid and vacuum lines seem to be working
Transfer case and shift motor seem to be working
Driver side IWE actuator seems to work
Front passenger side Actuator does not seem to be working??? Why I am so confused about this is because in HOURS of Internet research it seems that this Actuator is not allowed to engage by vacuum pressure. When I disconnect the vacuum line to the passenger side actuator I expected to hub to lock, but it did not, the tire would turn but the CV axle wouldn't? If I replace the passenger side IWE actuator will this fix my four wheel drive? Or is there something else I am missing??
When I turn the switch on the front wheels don't engage. I replaced the two vacuum solenoids on the firewall no change. I replaced the actuator motor on the transfer case and everything worked....once. Tried to go around the back of the house thought I was in 4x4 but front wheels not engaging again. buried in mud. I let it set there overnight. Went out earlier started it and put it in 4x4 and it started puling out front wheels engaged. As soon as I gave it a little gas the front wheels became disengaged and it wouldn't go anywhere. I made several more attempts and no luck. I did the vacuum test where you turn the heater on panel and if there's a vacuum leak somewhere the heater blower will default to defrost. It passed this test so I'm assuming there is no leak anywhere. Why it worked right after I replaced the transfer case motor and again only after I got stuck and it set in the mud overnight?
View 2 RepliesI picked up a 98 jimmy for my son and turns out it has many issues! The one I'm tackling now is the 4wd. Front wheels don't engage "unless you can't tell on these on dry pavement just to test it, but I don't feel it "crab walking" when turning.
Things I've done so far ..... New transfer case vacuum switch, replaced any tore vac lines "I had Hvac issue which is corrected now that I've done this" replaced cable to actuator under battery. It's a 3 button switch and lights appropriately when selecting 4hi or 4lo.
I can hear it engage and disengage and also hear the tccm click when I push the buttons. The cable pulls the actuator and the actuator moves and holds as it should which leads me to believe everything is working but why aren't the front wheels engaging??
Working on a 2004 Ford F150 4.6L. No 4x4. Replaced both IWE front actuators. (Neither one would hold vacuum). Still no 4x4. I realize I have vacuum issues and may be excessive wear on gear teeth of the front wheel bearings. The issue that really bothers me is the front differential. Having placed the truck on jack stands and running in 4x4 should both front wheels be turning ? The right front wheel turns and the left front does not move. Is this normal or should I pull the front differential cover off ?
View 7 RepliesI have a 2007 Ford F-150 SuperCrew Lariat (with Sunroof) that the Front Interior Dome Lights are not working in. I mention the Sunroof because there is a switch to operate the sunroof in the same panel as the front dome lights. The Sunroof switch works just fine though.
However, the back dome light does work. I would've thought these were on the same line but my thinking is probably wrong. So far I've pulled the front panel where the dome lights are located and checked the bulbs. The filaments are not broken at all and the bulbs seem to be good. I then went hunting for the Fuse box and looked through the user manual to see which fuse corresponds to those front lights. However, I've been unable to determine which fuse it is.
So I guess the questions I have are:
1.) Why the front dome lights would NOT be working and the rear dome lights are? Are these not on the same line?
2.) Which fuse corresponds to the front dome lights?
3.) What relay corresponds to the front dome lights?
4.) Do I need to disconnect the battery before messing with any of these fuses or relays?
Troubleshooting steps at this point?
(2004 f150 S.Crew 4x4) I noticed that my 4 wheel drive is not working. The front hubs won't lock in. The transfer case will go into 4 low but the hubs still won't lock in.
Anyway, I have pulled vacuum on both actuators and one of them won't hold. It's obviously bad, but is that why I don't have 4x4? It seems to me like it is not...
When I pull a vacuum on the actuator that does hold, it disengages the hub from the driveshaft allowing free-wheeling. Correct me if I'm wrong, but when the truck is running in 2wd, vacuum must flow to the actuators preventing the hubs from engaging? The actuator on the bad side is locked 'in' so the driveshaft always turns.
According to my train of thought, since the actuator has failed in the 'locked in' position, I should still have 4x4- What am I missing?
I have a 2000 f250 with auto/manual locking hubs and today the 4x4 quit working. The light comes on the dash and the drive shaft and u joints turn but the front wheels don't turn even when its locked in. I assume its the hubs? And when I am going down the highway about 75 the front starts making a hellacious noise but stops if I slow down is this connected?
View 11 Replies2008 5.4L triton. When I'm in the snow or mud and engage the 4 wheel drive I hit the gas and I can hear what I think it is the hub spinning but it will not turn the wheel. Hoping it is not my transfer case...
View 3 RepliesCouple weeks ago, was in a spot that needed 4wd. Turned the switch, the 4x4 dash light came on, but rear wheels didn't do anything. Lucky that we were able to get out with ft wheels only. Has 3.0, xlt version.
View 13 RepliesTruck shifts great from 2 to 4h to 4l and back to 2. However, at random times - any speed - usually when slowing down - I hear/feel something engage and there is usually a ratchet sound. I figured out its the 4x4 - if I switch to 4h then back to 2 quick, it stops. What the heck.
View 1 RepliesI have a 1998 F-150 and when shifting into 4 wheel drive (manual floor mount shifter) the drive shaft from the transfer case turns but the wheels do not engage.
Looking for a diagram of how the axle works?
For the last little while I have been having an issue with the 4wd in my 2006 F-150 with about 93k on the clock. Sometimes it would engage when I switched to 4H/4L and other times it wouldn't. A friend of mine works at a Ford dealership and said it could be the vacuum solenoid on the firewall going bad. So I bought a new one and as I removed the old one, noticed debris in one of the inlets. So I cleaned that out and neither old or new solved the problem. Then I went through ALL of the vacuum lines and found some debris in parts of them....
Cleaned them all out and still nothing. Then I got to thinking it may be the ESOF motor on the transfer case. Checked to make sure there was power to the plug, which there was. Removed the motor and turned switch, and the motor seemed to be working. Reattached the motor and the 4wd would engage/disengage without problem. Pretty much everywhere I went I would check it and it worked fine . Then all of a sudden it didn't . So I took the motor off, turned selector and it worked fine. No issues yesterday at all.
So, I am not sure if it is the motor going bad or not. Could there be a contact problem? I talked to a mechanic this morning and he told me to drive around with it in 4H for a while because more times than not it doesn't get used enough. I'm just not sure what could be going on...am I missing something?
I have a 2007 ford f150 and the 4wd will not engage at all checked vacuum lines they all look intact wondering if it could be the IWE solenoid and is there any way to test the IWE solenoid ...
View 5 Replies