Can I as a D-max owner point you to the IsuzuOz Forum?
Like this one, it is informative, helpful but vehicle specific. There is a General Isuzu section, as well as D-max, MUX sections.
Your question may have already been covered so you might find it with a search. If not, ask & you will receive, I'm certain.
One annoying point is that the forum times out after 60 miniutes; you can log back in for longer periods.
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Warren
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If you don't get it done today, there's always tomorrow!
"install wire to rear of vehicle cabin.", I guess you have considered alternatives, for instance running the wire behind the drivers, and right rear passengers door sill trim, may save a lot of work.
The main harness in my car runs along the passenger sill. This is easy to access. Pull off the door seals. You may need to pull off the B column trim panel etc. The panels just need a short sharp firm tug.
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Procrastination, mankind's greatest labour saving device!
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