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Old 03-31-2014, 10:26 PM   #1
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Question Help Wiring MS3/MS3x

I am putting a MS3/MS3x in a 93 with an 03 engine. I bought an engine harness so I could know what physically goes where.

Now I am trying to figure out what wire goes where. I have laid it out in a spreadsheet (Yes, I stole the format and some of the info from someone here). I am hoping that you guys can help me verify and clean it up. Can you look at the attachment and throw in your comments? (try to keep them civil and constructive...LOL).

I am also trying to figure out where the TACH OUT goes? Of course there is no wire from the old ECU to the tach. Best I can tell is that I need to run it from the MS to the old ignitor plug or the diagnostic connector. Does that sound right?

Fuel pump just confuses me altogether... I have read more about that and still have conflicting ideas... HELP... where do I really need to run the wire? Do I simply tap into the green wire on the old AFM plug?

Any and all help is appreciated.

Yes, I am basically keeping the 93 harness to handle the A/C (and bring in 12 volts to the MS).

Thanks, Mike
Attached Files
File Type: pdf MegaSquirt Wiring Config.pdf (39.1 KB, 299 views)
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Old 04-01-2014, 08:50 AM   #2
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youre making this harder than it is.
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Old 04-01-2014, 09:00 AM   #3
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Originally Posted by Braineack View Post
youre making this harder than it is.
That is usually what I do. I just verify and re-verify.

I just need to make sure that I only do this once
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