Update on this mod.
Drove the
rig last weekend (for 4 days) as we were going up to her sister's wedding, and I was playing taxi. She does not have the extended antenna (yet).
With my remote (which probably does need a new battery) I had to practially stand at the drivers side door to un/lock. I had trouble un/locking while standing at the tailgate (very irritating).
After coming home and getting to drive mine, I'm very happy with being able to trigger the alarm from 10+ feet away (easily, I can still hit longer ranges with LoS).
So this mod will actually save a bit of money and headache as:
1) I won't have to replace batteries as often because a "weak" battery can still trigger the alarm from a reasonable range.
2) I won't have to hit the button 10 times trying to it to un/lock. First or second try nearly every time.
Additionally we blew the fusible link in the back of the cigarette plug, and while "fixing" (*cough*bypassing*cough*) it I noticed that the grey wire was terminated on the wiring harness directly behind the alarm LED light. Mine was
not terminated there, but my guess is that it was a shorter wire and is probably still terminated on the bundle, just somewhere under/around the steering wheel.
So if you simply want to extend it up instead of bypassing, it might be worth while to pull that and see if yours is terminated there. It would still be more time consuming to run it back up the A pillar as you'd have to double back or extend past the glove compartment, as opposed to running it up the B pillar or up the seat.
HTH