4x4 Issues. Still no solution
04-22-2010, 01:31 PM
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4x4 Issues. Still no solution
I have an 03 f150 with on the fly 4x4. The dial in side the cabin has power coming to it and has the lights. The dash doesn't show 4x4 or 4x4 lo at all when i turn the switch and i don't hear any noise. The shift motor on the transfer case doesn't have any power going to it really. I have checked all fuses and they are all good. The relays in the engine compartment are fine but i don't know how to check the black ones, just the clear ones.
If this helps at all, my abs wasn't working either so i sent my module in to have it rebuilt, hopefully that fixes it and they aren't related...
Any help would be greatly appreciated since most of the posts i've read havn't helped much....
Thanks
If this helps at all, my abs wasn't working either so i sent my module in to have it rebuilt, hopefully that fixes it and they aren't related...
Any help would be greatly appreciated since most of the posts i've read havn't helped much....
Thanks
04-23-2010, 09:54 AM
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Interesting, This helps quite a bit actually.....
I've been lucky enough to get my abs fixed for a fraction of the dealer price as well as my automatic air conditioning head unit... Hoping I get this fixed now too so I can use my new tires!! Nitto Terra Grapplers. I love them!
But if anyone else can help, it would be greatly appreciated.
Thanks!
04-23-2010, 06:39 PM
#4
OVERTHINKER
Got this info from another site, might help
The 4X4 works with two systems - the shifter on the floor manually engages the transfer case. It also causes a relay to ground one of two solenoids that cause vacuum lines to activate an actuator which engages the front differential. If either of these do not work, your 4X4 won't work.
In my case, ad most that I have read, the 4X4 simply does not engage and the dash light either always goes on or does not go on.
1. Rule out transfer case problems: This is easy - get someone to put your truck in 4X4 and roll forward while you peek underneath from the side. If the front drive shaft is turning, your transfer case is fine and engaged.
2. Check the fuse! #23 by the hood lever and parking brake under the front dash.
3. Check the functioning of the solenoids: this is easy as well. The solenoids are located in the passenger side of the engine compartment directly behind the battery on the firewall.
From what I have read, a good indication of a problem here is the absence of the dash light. You can get fancy and test them electrically (they should each have 12V power all of the time) but the easiest way is to put your fingers on the plastic caps and feel and listen for a click as someone shifts your truck in and out of 4X4. If they click - they are working! If not, this is likely your problem. It is a common problem apparently for these years of trucks to get water in the solenoids which then freezes and cracks them.
Here is some good info and part numbers if this is your problem
"The right solenoid (E8AE-9H465-AA) controls the vacuum to the return side of axle engagement diaphram. The left solenoid (E8AE-9H465-BA) controls the vacuum to the activation side of the axle engagement diaphram. Ford has been having chronic problems with water entry into these solenoids, corroding them from the inside and seizing them,as you've seen!>>
They've been redesigned and those old part numbers (E8AE-9H465-AA/BA) have been superseded.
The latest designs are listed as:
Disengage solenoid 6L3Z-9H465-A (identified by electrical connector rib at 9:00 position)
Engage solenoid 6L3Z-9H465-B (connector rib at 6:00 position).
3. Check your vacuum lines: This is a little tricky to do becuase they wind their way from the solenoids all the way to the 4WD actuator on the front axle. One hose leaves from each solenoid at the front (close side to the battery) and one is pink and the other is blue(greenish if older). Follow the lines down as best as you can, checking for spots with wear or rubbing. Also make note if they seem old and brittle as there could be a crack you don't see. Mine were rubbing a bit on the passengers side wheel well so check there. Now crawl under the truck and in the centre on the axle is the actuator diaphragm. It is under a cover that is easily removed with a socket and the two hoses are attached to it. Pull the hoses off and while the truck is on, and someone shifts it in and out, put a finger over the end of each hose. The vacuum should alternate hoses when shifted and the pressure should be equal although it is surprisingly not a strong pull. If your hoses look good and suck like I said, they should be all good (this also confirms that your solenoids, and vacuum reservoir are working as well.)
4. Vacuum actuator function: This is easy to check. Crawl under your truck, take off the cover for the actuator and watch as your friend shifts from 4X4 and back. When the truck is shifted to 4X4, the shaft should slide into the diaphragm, moving the lever it is connected to to the passenger side direction. When shifted back to 2 wheel, the shaft should slide out of the diaphragm towards the drivers side. The movement is about 2 inches total and happens smoothly.
If this works, then you may want to check to see if the shift fork (the lever that the actuator moves) is not bent or broken, or the pin that holds it in place is not sheared. It this all good, then maybe your front differential needs help?
If the diaphragm moves stiff and short, it is one of two problems: there is a tear in the diaphragm or the shaft has corroded and is stiff and needs lube. To check if the diaphragm is just stiff, assist the truck by pushing the shaft in an out by hand. This should engage and disengage the 4X4. When I did this, I engaged the 4X by pushing the shaft in but it was very stiff and hand to pull it out again with leverage from a screwdriver. Mine was just stiff and needed lubrication - which worked! If you can move it freely by hand, I would say there is a tear in the diaphragm and you probably need a new one. Try ebay -- they are $100 where at Ford they are $460!! Part number is F65Z-3G360-BA
The 4X4 works with two systems - the shifter on the floor manually engages the transfer case. It also causes a relay to ground one of two solenoids that cause vacuum lines to activate an actuator which engages the front differential. If either of these do not work, your 4X4 won't work.
In my case, ad most that I have read, the 4X4 simply does not engage and the dash light either always goes on or does not go on.
1. Rule out transfer case problems: This is easy - get someone to put your truck in 4X4 and roll forward while you peek underneath from the side. If the front drive shaft is turning, your transfer case is fine and engaged.
2. Check the fuse! #23 by the hood lever and parking brake under the front dash.
3. Check the functioning of the solenoids: this is easy as well. The solenoids are located in the passenger side of the engine compartment directly behind the battery on the firewall.
From what I have read, a good indication of a problem here is the absence of the dash light. You can get fancy and test them electrically (they should each have 12V power all of the time) but the easiest way is to put your fingers on the plastic caps and feel and listen for a click as someone shifts your truck in and out of 4X4. If they click - they are working! If not, this is likely your problem. It is a common problem apparently for these years of trucks to get water in the solenoids which then freezes and cracks them.
Here is some good info and part numbers if this is your problem
"The right solenoid (E8AE-9H465-AA) controls the vacuum to the return side of axle engagement diaphram. The left solenoid (E8AE-9H465-BA) controls the vacuum to the activation side of the axle engagement diaphram. Ford has been having chronic problems with water entry into these solenoids, corroding them from the inside and seizing them,as you've seen!>>
They've been redesigned and those old part numbers (E8AE-9H465-AA/BA) have been superseded.
The latest designs are listed as:
Disengage solenoid 6L3Z-9H465-A (identified by electrical connector rib at 9:00 position)
Engage solenoid 6L3Z-9H465-B (connector rib at 6:00 position).
3. Check your vacuum lines: This is a little tricky to do becuase they wind their way from the solenoids all the way to the 4WD actuator on the front axle. One hose leaves from each solenoid at the front (close side to the battery) and one is pink and the other is blue(greenish if older). Follow the lines down as best as you can, checking for spots with wear or rubbing. Also make note if they seem old and brittle as there could be a crack you don't see. Mine were rubbing a bit on the passengers side wheel well so check there. Now crawl under the truck and in the centre on the axle is the actuator diaphragm. It is under a cover that is easily removed with a socket and the two hoses are attached to it. Pull the hoses off and while the truck is on, and someone shifts it in and out, put a finger over the end of each hose. The vacuum should alternate hoses when shifted and the pressure should be equal although it is surprisingly not a strong pull. If your hoses look good and suck like I said, they should be all good (this also confirms that your solenoids, and vacuum reservoir are working as well.)
4. Vacuum actuator function: This is easy to check. Crawl under your truck, take off the cover for the actuator and watch as your friend shifts from 4X4 and back. When the truck is shifted to 4X4, the shaft should slide into the diaphragm, moving the lever it is connected to to the passenger side direction. When shifted back to 2 wheel, the shaft should slide out of the diaphragm towards the drivers side. The movement is about 2 inches total and happens smoothly.
If this works, then you may want to check to see if the shift fork (the lever that the actuator moves) is not bent or broken, or the pin that holds it in place is not sheared. It this all good, then maybe your front differential needs help?
If the diaphragm moves stiff and short, it is one of two problems: there is a tear in the diaphragm or the shaft has corroded and is stiff and needs lube. To check if the diaphragm is just stiff, assist the truck by pushing the shaft in an out by hand. This should engage and disengage the 4X4. When I did this, I engaged the 4X by pushing the shaft in but it was very stiff and hand to pull it out again with leverage from a screwdriver. Mine was just stiff and needed lubrication - which worked! If you can move it freely by hand, I would say there is a tear in the diaphragm and you probably need a new one. Try ebay -- they are $100 where at Ford they are $460!! Part number is F65Z-3G360-BA
01-21-2012, 01:46 PM
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Fixed
It's been a while but yesterday I finally fixed my 4x4.
I took it to Ford and paid 130 to have them diagnose it. Turns out it was the Transfer Case Motor. Here are my symptoms - No 4x4 light, no click in the solenoids and no transfer case or front end noise. Popped a new motor in for $100 from advance auto parts and it works like a dream. I also changed my transfer case fluid.
Thanks for your responses.
Hope this helps someone out there!
I took it to Ford and paid 130 to have them diagnose it. Turns out it was the Transfer Case Motor. Here are my symptoms - No 4x4 light, no click in the solenoids and no transfer case or front end noise. Popped a new motor in for $100 from advance auto parts and it works like a dream. I also changed my transfer case fluid.
Thanks for your responses.
Hope this helps someone out there!