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We are swapping an aw4 where a nv3550 use to be. We are using the write up on Stu Olson’s page and is pretty easy to follow. We are in need of a little wiring help. We are supposed to use pin 28 white (with black stripe) on the grey ecm on the Tj. That pun isn’t used so there isn’t a wire. It’s the ccd buss - . Is there anywhere else we can find that wire in the harness?
 

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I helped to wire in an AW4 into a KOH race car and it was a PITA due to the inconsistencies in the wiring color code used on different years of the AW4. Good luck with it but you will probably find the AW4 runs hot. I'd add an aux cooler plumbed in after the radiator transmission cooler. I much prefer the 32RH automatic I converted my previous TJ to.
 

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If you have a blank at pin 28 I assume you have a 2001 or later TJ. If so you do not have CCD bus, it has PCI bus.

I’m not sure but think all (XJs) that used the TCM for the AW4 were CCD bus.
 
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