Looking for a high-res photo or scan of Rotunda EEC-IV Overlay #17 or #23

Smokinjoe 33

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May 19, 2026
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Hey everyone,
I’m working on diagnosing a 1993 5.0L Mustang GT and I’m using an old Rotunda EEC-IV Monitor (Tool #007-00047). Unfortunately, my kit is missing the vehicle-specific plastic overlays.
I know that Overlay #17 is the factory correct one for this year, and Overlay #23 works as a solid substitute.
Does anyone out there happen to have Rotunda Manual #3 (EFI/SFI) or the overlay pack handy? If you do, could you take a flat, high-resolution smartphone photo or a quick flatbed scan of Overlay #17 or #23?
I just need a clear visual of the pin layout and the IR window punch-outs so I can replicate the pattern and force the monitor into the correct 5.0L profile.
Appreciate any help or photos you can share! Thanks!
 
Hey Joe,my name is Carlos,sorry i hadn't seen your post, i have one of these machines i bought mint about 3 years ago, i think they are killer, i have a 89 and a 91 and i have gotten conflicting info on the overlays.

When i bought my machine i bought it from a lady in California,i think her husband worked for Ford cause she had a ton of Rotunda stuff,i was told by many people i needed overlay 26, the lady had the big book and she was selling it apart from the machine,she wanted more for the book than the machine,lol, so i had to pass however i asked her "is there anyway you could part with overlay 26 so i can at least get the machine working? and she said "no problem"

I have used the machine quite a few times and in my case it worked perfectly however i would love to have the book since there are values i cannot interpret without having a legend of sorts of what values i need to have to begin with, if this makes any sense.

If overlay 26 would help you i will be glad to take a pictures of it for you,maybe you can give me your email address? not sure what a "flatbed" is but i know how to take pictures, just tell me what you need.
 
Flat bed scanner

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