Shift on the fly switch?
Shift on the fly switch?
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Posting Guru
Joined: Feb 2007
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From: Bradenton FL
I just realized why no one is really responding to both my 4wheel drive issues, now that i see almost EVERYONE who has esof has had problems of some kind with it
and are tired of hearing about it Specifically the switch, anyone????
and are tired of hearing about it Specifically the switch, anyone????
Postmaster
Joined: Jan 2005
Posts: 4,743
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From: Peoria, IL
I have not heard of many problems with the switch itself. It is usually a problem with the front hubs or vacuum system. Sometimes it will be the electric shift motor on the transfercase itself.
Make sure to double check all your fuses and relays before you start digging in too deep with other stuff though.
Make sure to double check all your fuses and relays before you start digging in too deep with other stuff though.
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Joined: Feb 2007
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From: Bradenton FL
I started a thread in the diesel forum about this, the situation as it is right now. Both 4x4 lights cycle when the key is turned over, my hubs dont lock(no vacuum leak), and the transfter case doesnt engage. When i move the switch to 4x4hi ABSOLUTELY nothing happens, no dash light no noises, nothing, i can manually lock the hubs though
and the hubs engage the front drive shaft
and the hubs engage the front drive shaft
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From: Bradenton FL
Not yet, what does the relay power? The solenoid? Is the relay driver side by the master cylinder?
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Postmaster
Joined: Jan 2005
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From: Peoria, IL
I believe there are two relays. One that powers the vacuum system, and one that powers the shift motor. I believe they are under the hood by the master cylinder (I guess Ford doesn't bother listing them in the owner's guide anymore). The relays should have one terminal hot all the time (or possibly just with the ignition on, I'm not sure), it should have two terminals that go to ground (one actually goes to either the vacuum system or shift motor and then to ground). And one should recieve power any time the switch on the dash is changed to 4x4 (with the vehicle on or running).
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From: Stephensville WI
Yes, the transfer case motor does go bad, but it isn't the weakest link in the ESOF system. The weakest links are the hubs.
As for the switch, it's probably the least troublesome part for ESOF!
From what I hear, even parts stores carry replacement motors.
As for the switch, it's probably the least troublesome part for ESOF!
From what I hear, even parts stores carry replacement motors.
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Joined: Feb 2007
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From: Bradenton FL
Redford thanks for the help, :::"from the other forum":::
OK so today i replaced the switch and checked both fuses related to 4x4, flipflopped around every relay on the truck i could find, and checked for voltage at the shift actuator-motor. Nothing happening on the dash, no lights for 4x4 except the ones that cycle with the key and go out, turn the 4x switch nothing, and no voltage at the shift actuator-motor. Im at a huge loss here...Im thinkin the only thing left is "software" Im pretty sure the 4x4 is located in the GEM "jim" module, can it lock you/user out of 4x4 if it doesnt like some fashion of whats going on???
OK so today i replaced the switch and checked both fuses related to 4x4, flipflopped around every relay on the truck i could find, and checked for voltage at the shift actuator-motor. Nothing happening on the dash, no lights for 4x4 except the ones that cycle with the key and go out, turn the 4x switch nothing, and no voltage at the shift actuator-motor. Im at a huge loss here...Im thinkin the only thing left is "software" Im pretty sure the 4x4 is located in the GEM "jim" module, can it lock you/user out of 4x4 if it doesnt like some fashion of whats going on???
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Posting Guru
Joined: Feb 2007
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From: Bradenton FL
Does anyone have a pic of the vac solenoid or the wires and connector that power it? Does anyone know if the switch itself powers the vac solenoid and transfer switch motor or the GEM module, via input from the ESOF, tells the relay to turn on switching the two?