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Old 02-08-2014, 12:42 PM
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4X4 NOT ENGAGING

Hey guys I have a 99 f250. I have warn manual locking hubs because I didn't like the vacuum idea so that isn't an issue however I have the electronic switch and my 4wd will not engage. When I switch it on I am getting no light on dash however when I turn my key on before it starts the 4x4 light flickers so the light does work. Any ideas? I replaced the relays so that issue is ruled out. Thanks guys!
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Old 02-09-2014, 01:21 PM
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From owner's manual..."To prevent damage, the electronic shift 4WD system is designed
to allow up to 45 seconds before the shift command is performed."

Make sure you wait long enough. You also may have to move the vehicle before it will actually engage.

If it still won't work...there are 2 fuses which are related to the ESOF. Under dash #28, under hood #17. Check these first. If they are good, turn your key on, but don't start the engine. Wait a few seconds for the fuel pump and vacuum pump to kick off. Then turn the switch from 2 wheel to 4 high. You should hear the shift motor in the transfer case click as it engages. If not, your dash switch or the shift motor may be bad. Find a dirt patch and turn your wheel full lock, and drive ahead slowly. If the truck shimmies from side to side as you are turning, you ARE in 4 wheel, and the indicator switch in the transfer case is no good. You must be STOPPED, have foot on brake, AND for auto trans be in neutral, for manual trans hold clutch in for it to shift into 4 low
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Old 02-10-2014, 06:15 PM
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Quote:
Originally Posted by delta99 View Post
From owner's manual..."To prevent damage, the electronic shift 4WD system is designed
to allow up to 45 seconds before the shift command is performed."

Make sure you wait long enough. You also may have to move the vehicle before it will actually engage.

If it still won't work...there are 2 fuses which are related to the ESOF. Under dash #28, under hood #17. Check these first. If they are good, turn your key on, but don't start the engine. Wait a few seconds for the fuel pump and vacuum pump to kick off. Then turn the switch from 2 wheel to 4 high. You should hear the shift motor in the transfer case click as it engages. If not, your dash switch or the shift motor may be bad. Find a dirt patch and turn your wheel full lock, and drive ahead slowly. If the truck shimmies from side to side as you are turning, you ARE in 4 wheel, and the indicator switch in the transfer case is no good. You must be STOPPED, have foot on brake, AND for auto trans be in neutral, for manual trans hold clutch in for it to shift into 4 low
if none of that works, time to swap in a manual transfercase
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Old 02-10-2014, 07:41 PM
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Quote:
Originally Posted by delta99 View Post
You must be STOPPED, have foot on brake, AND for auto trans be in neutral, for manual trans hold clutch in for it to shift into 4 low
^^That's the most common solution.

There are also two relays under the hood. One, or both, may be bad.
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Old 02-16-2014, 07:41 AM
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Quote:
Originally Posted by delta99 View Post
From owner's manual..."To prevent damage, the electronic shift 4WD system is designed
to allow up to 45 seconds before the shift command is performed."

Make sure you wait long enough. You also may have to move the vehicle before it will actually engage.

If it still won't work...there are 2 fuses which are related to the ESOF. Under dash #28, under hood #17. Check these first. If they are good, turn your key on, but don't start the engine. Wait a few seconds for the fuel pump and vacuum pump to kick off. Then turn the switch from 2 wheel to 4 high. You should hear the shift motor in the transfer case click as it engages. If not, your dash switch or the shift motor may be bad. Find a dirt patch and turn your wheel full lock, and drive ahead slowly. If the truck shimmies from side to side as you are turning, you ARE in 4 wheel, and the indicator switch in the transfer case is no good. You must be STOPPED, have foot on brake, AND for auto trans be in neutral, for manual trans hold clutch in for it to shift into 4 low
fuses are good. relays are new. switch is new. tcase motor is new.

tried the waiting. only way to get it in 4wd is to pull the relays and use a jumper wire to make the shift motor work.

iv ran out of options to try and replace things.
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Old 02-18-2014, 12:50 PM
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I read somewhere that the 2003s are different than other years but I had the same problem and found that my 4x4 Module behind the glovebox was corroded. I replaced it with the one below and it solved the problem.

http://www.ebay.com/itm/2003-Ford-Su...af75a1&vxp=mtr
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