Overdrive Light Flashing
New User
Joined: Mar 2009
Posts: 2
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(no on the st, just around the auction area) and it shifted smooth. i didnt get through all the gears so i know that doenst mean anything. i'd really like to get this truck but i dont want to break the bank to get it right. lol dont crucify me, but i'm usually a chevy man and i know what the known troubles are for them but not with fords. thanks for all yalls help
Cargo Master
Joined: Jun 2003
Posts: 3,292
Likes: 6
From: Ardenvoir, Washington
I'm lookin at an F550 at an auction and the OD light is flashing too. I don't know if the cruise works or not because I didn't look at it that hard. I really like the truck but if the tranny needs to be rebuilt I dont want it. But from what I see here it may just be the computer. Is this the case?
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,739
Likes: 2,669
From: SE Florida
That's correct. It needs to be a Ford specific scan tool, not some generic scan tool. The generic ones can't read Ford trans codes.
Senior User
Joined: Jun 2006
Posts: 101
Likes: 0
I have had this exact same problem. I got to my whits end and gave in and sent it to the stealership. They called me 2 days later and said they have ran all the wire diagnostics, bla bla bla. Basically, their is a voltage that is not coming out of the PCM. So, they want $900 to replace. So, first off, i've looked everywhere, i'm assuming the PCM that all the TSB's talk about is the ECM that you all are referring to. If so I need to figure out what kind i need to buy. I have a 2000 Excursion, 7.3l. Any help would be greatly appreciated.
New User
Joined: May 2009
Posts: 1
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My truck had the p1747 code and was also blowing fuses (15 amp or 30 amp) under hood. Found out it was a short in the circiut(electrical) harness because it overheated and burnt some of the wires at soe point. After they were fixed it-it works great.
On a similar note, One shop told me the transmisson needed to be overhauled and the torque converted was locked. With the same codes and problems I had. It seems this code is very confusing. HH
On a similar note, One shop told me the transmisson needed to be overhauled and the torque converted was locked. With the same codes and problems I had. It seems this code is very confusing. HH
Senior User
Joined: Jun 2006
Posts: 101
Likes: 0
Well, i replaced my PCM and it did not fix the problem. Still have a P0670 and the occasional slipping transmission and flashing O/D light. So, now i've replaced the GPCM, the PCM, and had the wiring checked. This is confusing the #@#t out of me. What does the other box in the driver side fender do? Could this be causing my problems? My truck is a 2000 X 7.3L so I've got all the California stuff. It does have a relay next to the fuel bowl but I don't know if that is a glow plug relay or what, and if that would cause the problem. What do you guys think?
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