Overdrive Not working
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Overdrive Not working
Hi guys I have a 2000 f250 and my overdrive is not working. I have tryed putting a new switch on to the shifter did not fix the problem. I also checked the wire to see if it was shorting out or got unplugged but that also was not the problem. Just need to know what to look at next. I dont use it much just once a week when I am pulling my trailer to go mow lawns. I dont think I even need to use it. Its not very heavy but Im kind of a freek when it comes to having every thing working and looking good on my truck. 
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Senior User
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Yeah that is where I checked the wire and made shore it was plunged in. And every thing was good
Trailering
Joined: Dec 2012
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Did you ever figure out this problem? I have a 00 350 with the same problem. Took the column cover off and it was un plugged, so I thought, damn that was simple. But it still didn't work and had no shorts from plug to button. Let me know what yours turned out to be, thanks.
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Senior User
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Did you ever figure out this problem? I have a 00 350 with the same problem. Took the column cover off and it was un plugged, so I thought, damn that was simple. But it still didn't work and had no shorts from plug to button. Let me know what yours turned out to be, thanks.
Post Fiend
Joined: Nov 2007
Posts: 9,549
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From: Payson, AZ
Did you ever figure out this problem? I have a 00 350 with the same problem. Took the column cover off and it was un plugged, so I thought, damn that was simple. But it still didn't work and had no shorts from plug to button. Let me know what yours turned out to be, thanks.
Check that there is 12 volts on the lead that goes from fuse to button. If there is 12 volts check to see if, while button is depressed, it passes to the TCS lead. If the PCM sees the 12 volts it will alternately supply a ground back to the TCIL every other time the button is depressed. It will turn the OD lamp on and off.
When you open the wiring diagrams at bottom of post this will hopefully make more since.
If the TCS is bad it is easy to replace.
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Post Fiend
Joined: Nov 2007
Posts: 9,549
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From: Payson, AZ
If I have to replace the button it won't be that easy. The button cover kept falling off and I glued it on. 
Trailering
Joined: Dec 2012
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I put my meter on the plug end and I have continuity through two of the three wires when I press the button. I don't think my wires ar cut. The light will not come on and the tranny will not down shift when I push the button. Any other ideas?
Frmr Ford Trans Engr
Joined: Aug 1999
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From: SE Florida
The wiring is damaged between the connector in the steering column and the PCM.
Post Fiend
Joined: Nov 2007
Posts: 9,549
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From: Payson, AZ
Pressing the button should make continuity from the RED/YEL wire to the TAN/WHT. Is there 12 volts on the RED/YEL wire? There is probably a wiring problem and why the PO unplugged the connector. Fuse 19 or 45, depending on model year, was probably blowing when he pushed on the OD button.
The third wire, WHT/LT GRN, the TCIL lead, is for the ground to light the OD off lamp. You won't see a ground there until the PCM sees the momentary 12 volts on the TCS lead. If you ground the WHT/LT GRN wire the OD off lamp should light if there is 12 volts on the RED/YEL.
Like Mark said "The wiring is damaged between the connector in the steering column and the PCM", OR between the connector and the fuse.
The third wire, WHT/LT GRN, the TCIL lead, is for the ground to light the OD off lamp. You won't see a ground there until the PCM sees the momentary 12 volts on the TCS lead. If you ground the WHT/LT GRN wire the OD off lamp should light if there is 12 volts on the RED/YEL.
Like Mark said "The wiring is damaged between the connector in the steering column and the PCM", OR between the connector and the fuse.
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