Hello
I can’t help directly but would recommend the wiring diagrams found on the Hiace Southeast website. See here: https://www.hiacesoutheast.com/hiace-manuals
I can’t be sure that the tach wire will be included but this is the most comprehensive and easy to navigate wiring diagram set I’ve ever seen for the Hiace; many of the others out there are disjointed and not easy to follow.
An aftermarket cruise control is something I’m looking to fit to my van as I have cc on my car (which is also a manual) and I find using cc a much more relaxing way to drive when conditions allow. It’s especially useful in areas with average speed cameras, too.
Anyway which cc have you gone for, please? Is it a ‘universal’ kit or a model-specific variety as I presume your van has an ECU?
I looked into this last year, but didn’t draw any conclusion on what to get, neither specific kit nor make even. Grateful if you can add anything here or have you created an installation post? Be good to see how you’ve done the installation, too? Can you add any pictures? Is it on a stalk or buttons? Does your van have a tach? Mine does not, but it’s another thing I’d like to add and don’t know whether this could be included within the instrument cluster (I did this on a diesel turbo Peugeot as the wiring was all present despite a manual injection pump etc), or whether an additional gauge would have to located elsewhere. I don’t know whether I have the wiring, too? Mine is a 3L engine but I’ll start to look into the wiring needs and related installation options, but welcome your work to hopefully avoid dead ends.
Thanks