The Z1 feed is only showing 10.4v everywhere. So I did some digging at the minimopar sight Kcar turned my on to.
Apparently this condition is caused by a little fusible link that goes bad; a white one. So out to the car I went, and yep it stretches if you pull on it hard enough.
So hopefully I've found my problem, I'll know later today once I get a new link.