[cfl650]

May sound kinda dumb but.... I'll be darned if I can't find the check engine light on my 92 f-250 7.3 idi. It does not light up at startup. I took the bezel off around the gauges and shined a light through all the holes in it and don't see it in the bezel. I then shined the flash light around the gauges themselves and can't see any evidence of where it wold be. Can someone post a pic of theirs and then I will look for it on mine. I am trying to get the blink code for the tranny but kinda hard when there is no light to blink.

 

[chuckster57]

Here's the link you need:
Ford ? OBD/OBD2 Trouble Codes

 

[Trucker87]

Hey, I've got a 92 F350, next time I get around it, I'll check for you.

 

[madpogue]

Um, the Check Engine light is just that, Check ENGINE. Has NOTHING to do with the tranny. It's obviously only electromechanical, since there are no engine electronics. To get a code from the TECA/TCM, you need to scan it.

 

[LMJD]

I'm not sure because I don't have an automatic, but there may be a harness plug easily accessed under the dash where you can plug in to get a trans trouble code. Bet Chuckster57 knows.

 

[Ken Cook]

I also have a 92 7.3 IDI. I do not have a check engine light.

Mine is an automatic. I noticed that my O/D OFF light on the shifter was flashing and did a search. It meant I had an transmission code. After searching further I found out about not having a check engine light. I also found out that this truck is NOT OBDII it is OBDI (that is 1 and 2). The way to read the codes is with a Test Light, under the hood, right in front of the drivers seat on the firewall.

I saw an earlier post with a link. It is probably what I used.

 

[Steve83]

This shows where it WOULD be:



This caption explains how to read EEC-IV codes (OBD-I is a GM system; Ford never used it):

 

[chuckster57]

I'm not sure because I don't have an automatic, but there may be a harness plug easily accessed under the dash where you can plug in to get a trans trouble code. Bet Chuckster57 knows.

The plug is in the engine bay, D/S above the fender well.

And YES we have had the discussion about OBD I, OBD II until fingers have bled. Your truck IS OBD I despite what others say.

http://www.obdsol.com/knowledgebase/on-board-diagnostics/what-is-obd/

 

[cfl650]

Thanks everyone. I should have put it together that it wouldn't have one if there is no computer. I had the same blinking o/d light and the truck wouldn't shift automatically. I put a new tcu in it and the flashing went away and is shifting now. I just don't think it is shifting right. It will rev to about 2200 rmp before it shifts to 2nd without a load. If I punch it will rev into the 3500 range then almost immediately to third then over drive. Someone told me it sounds like it could be the shift solenoid. Any ides?

 

[chuckster57]

On the side of the IP there is the equivalent of a throttle position sensor, its called an FIPL. In simple terms, it is a potentiometer that measures voltage and helps determine shift points. There is a procedure to set the voltage at idle and WOT. A search for "FIPL adjustment" should give you positive results.