. How bad is this, it is shifting hard at times??
overdrive caution light flashing
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Senior User
Joined: Jun 2009
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From: Terrace, B.C.
overdrive caution light flashing
Hi - I have a '94 F#% (haha freudian slip) F350 7.3 diesel with auto transmission and electric overdrive. I have put about 500 miles on it since purchasing it a few months ago with no tranny problems. Tonight after a short trip and being parked for 10 hours or so, I get in and the yellow overdrive light in the shift handle is flashing and reading "off". The truck would not shift out of 2nd gear after being driven for a few minutes but eventually did shift into 3rd but it did not go into O/D. Would anyone have a way to trouble shoot this or reset the thing? Much appreciate any help..I'm thinking maybe an electrical connection is bad someplace, I am not sure where to start looking
Post Fiend
Joined: Mar 2002
Posts: 19,402
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From: Bonita Springs FL
It could be a wiring problem between the PCM and the transmission. Check the wiring harness at the transmission for loose/corroded connections.
You can disconnect the battery, that will reset the computer. Does the torque converter lock up in overdrive?
You can disconnect the battery, that will reset the computer. Does the torque converter lock up in overdrive?
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Joined: Sep 2009
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Just a ps to last, would pcm be the power control module?? If so, where would that puppy be located - thanks again.
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Same problem
I'm having the same problem, only it's on occasion and not all of the time. Where exactly is this PCM located? Is it on the inside of the cab under the parking break or the underneath outside of the cab? What does it look like?
Is there anything in particular to "clean it up"
Thanks
Is there anything in particular to "clean it up"
Thanks
New User
Joined: Sep 2009
Posts: 5
Likes: 0
I'm having the same problem, only it's on occasion and not all of the time. Where exactly is this PCM located? Is it on the inside of the cab under the parking break or the underneath outside of the cab? What does it look like?
Is there anything in particular to "clean it up"
Thanks
Is there anything in particular to "clean it up"
Thanks
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