On the stock Isuzu tailgate release button there is a light on the bottom of the button that is supposed to light up when the tailgate is open so you have a visual cue telling you that it is ajar.
I wired the original door popper per Tone's instructions, but I ran a second wire from the pin switch at the rear door (that is tied into the wire for the light at the passenger door sill) so that the "door ajar" indicator light on the button would light up. The problem with that is when the ajar light is on it deactivates the button, so that if ANY of the doors are open I can't use the tailgate release button. I'm no electrician, and as far as car wiring goes, if it isn't spelled out for me and I try and add-lib it then it probably won't work. I think I'm going to try and disconnect the wire from the pin switch at the rear door to the ajar light and see if that clears some stuff up.
If you have any kind of diagram that worked for you I would much appreciate it, even if you just spell it out (but pictures are usually better for me).
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong, it usually turns out to be impossible to get at or repair."
-Douglas Adams, Mostly Harmless