OD Switch or what?
Thread Starter
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Lead Driver
Joined: Jul 2003
Posts: 7,404
Likes: 52
From: Wheatland, Mo
OD Switch or what?
When I bought my truck about 3 months ago....the OD OFF light wouldn't work, but the switch did. Would work fine. Now nothing. NO OD off option, no light nothing.
Any easy checks before I start replacing parts like the shift lever?
Any easy checks before I start replacing parts like the shift lever?
Senior User
Joined: May 2007
Posts: 356
Likes: 2
From: Dinwiddie, Virginia
A few of our trucks did that. Just use your knife or strong fingernail to remove the trim ring aroung the OD button at the end of the shifter. Then just pull out the button with its plug. Clean the contacts there may be beer juice in there. It may be that simply to fix.
The button may need to be replaced. The dealers keep them in stock, its cheap.
Or a wire could be frayed between the button and the trans. Very carefully trace every inch of the wire starting at the button and go under the dash. We have found in two differnt trucks in two different places.
Yes, you do need it fixed. You may need to turn off overdrive one day, but the big reason is that the light is your warning light that something is wrong with the trans. A warning light telling you the trans is overheating would have been nice to see at the bottom of that long hill, wouldn't it?
The button may need to be replaced. The dealers keep them in stock, its cheap.
Or a wire could be frayed between the button and the trans. Very carefully trace every inch of the wire starting at the button and go under the dash. We have found in two differnt trucks in two different places.
Yes, you do need it fixed. You may need to turn off overdrive one day, but the big reason is that the light is your warning light that something is wrong with the trans. A warning light telling you the trans is overheating would have been nice to see at the bottom of that long hill, wouldn't it?
FTE Leadership Emeritus
Joined: Sep 2000
Posts: 23,174
Likes: 1,678
From: Stephensville WI
If the truck gets locked out of overdrive then the switch works fine. No need to blow apart your shift lever.
Maybe the light is burnt out. Does it light up when you turn the key on (starting sequence). All of your lights should illuminate at that point, it's a light bulb test.
Maybe the light is burnt out. Does it light up when you turn the key on (starting sequence). All of your lights should illuminate at that point, it's a light bulb test.
Post Fiend
Joined: Feb 2007
Posts: 5,078
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From: Rural WV
Love the sig line....
Have you checked fuses? I don't remember anything specific back up in the tech folder but you might want to go back to the 7.3 forum and see it there's anything there. I've got a 6.0 so I've not spent any time in the specific 7.3 threads.
Have you checked fuses? I don't remember anything specific back up in the tech folder but you might want to go back to the 7.3 forum and see it there's anything there. I've got a 6.0 so I've not spent any time in the specific 7.3 threads.
Thread Starter
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Lead Driver
Joined: Jul 2003
Posts: 7,404
Likes: 52
From: Wheatland, Mo
Originally Posted by redford
If the truck gets locked out of overdrive then the switch works fine. No need to blow apart your shift lever.
Maybe the light is burnt out. Does it light up when you turn the key on (starting sequence). All of your lights should illuminate at that point, it's a light bulb test.
Maybe the light is burnt out. Does it light up when you turn the key on (starting sequence). All of your lights should illuminate at that point, it's a light bulb test.
FTE Legend
Joined: Jul 2005
Posts: 65,938
Likes: 1,432
From: Millersville, MD
Originally Posted by redford
No, the OD light will blink if your transmission is about to depart the planet........in theory anyway.
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More Turbo
Joined: Oct 2003
Posts: 597
Likes: 22
From: Central Maine
I think the bulb is built into the switch. I had to replace mine because my bulb flickered sometimes (obvious bad connection). I pulled a switch from an exploder or something at the junkyard. The switches are the same across a bunch of models.
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