Installing 1989 N/A 2.3l and A4LD into 1948 English Standard and planning on using stock ECM but donor original Mustang wiring harness is a mess. Looking for diagram if anyone has one or can help. Thanks in advance for any info.

If you go to autozone.com and register...free.. they have the diagrams up to '88...should be the same.

Welcome Second source. http://www.rothfam.com/svo/reference/88-90Mustang.pdf Cool project. Putting a 2.3 turbo in a MGB. Already did that to a 89 Mustang. Good luck and post pictures. If they won't let you because of not being a Mustang PM me and you can e-mail. Love the idea. Maurice

Cool swap! Have you considered going turbo?

This is what I use. It's the real deal!
2.3 Mustang wiring diagram

another link, maybe useful for you
http://www.veryuseful.com/mustang/tech/engine/

oops that one was for 5.0, but the links in bottom of page are useful for all fox body cars

i need a charging system wiring diagram, my charging system is completely junk i think there was a fire under the hood.... please send me a picture or a link, i have a 1980 fox body with the 2.3l n/a

I think yours in a 1g alternator. Here is generic link.
http://www.fordfuelinjection.com/pub...ALT_wiring.gif
Here is link to alternators. Can look thru and find picture of yours and then find wiring diagram.
http://www.fordfuelinjection.com/?p=63
Four eye pride website. With library. Maybe it is in there. If 85 is same I have that diagram that I can scan. Just pm me if that would help. Maurice
http://foureyedpride.com/fep_bild/v/img_arch/

i need a wiring diagram from oil sending unit to ecu. Also im not running an a/c so how do i wire in the electric fan .

Will try to help. Need year model of Mustang. Now for oil sending wiring diagram this is a pretty good genic diagram.
http://www.veryuseful.com/mustang/te...fuelSender.gif
Pin out at dash.
http://www.stangnet.com/tech/cluster87-93.pdf
Now for the engine fan. A few choice. One is a aftermarket hotrod fan controller. Numberous suppliers have them.
Second is use the factory. Just unplug the AC section and it will work just like have the ac off. Now if yours is messed up.
Early model Mustangs use a trw module under the dash at the gauge console. What it looks like a picture of usual failure and my method it fix.
http://s177.photobucket.com/albums/w.../TRW%20module/
Now when they went to 8 plug head it changed now off module on inner passenger fender. Wiring diagram on page 2 of this link. Maurice
http://www.rothfam.com/svo/reference/92-93Mustang.pdf

thanks guys for the help. Almost through with body and will start on wiring and finishing up drivetrain over the next few weeks. Will try to post some pictures after I get my shop moved this week.