2000 Mazda 626 remote start install ?

I recently installed 2 remote starts (CrimeStopper RS 800 III) on two separate 2000 Mazda 626's and I have an observation and a dilemma: Observation -

• Although virtually all of the wiring diagrams I've run across as well as the more-than-helpful tips I've run across from fellow members, I found that not all of these models need an immobilizer bypass, but only the V6's. 4cyl's (or at least the one I did) don't need it.

Dilemma - On both of these installs, I had a problem where the cruise control, for some reason, would not activate. Troubleshooting thus far narrowed the problem down to the brake wire. Now, two separate vehicle wiring diagrams (one from here and one from WireMagic.com) show two different wires as the brake wire - Purple (+) and WHITE/ Green (+), with the brake wire from the remote start unit needing a positive trigger to shut the system down. I put my DMM on both of these wires in both cars, and they both tested out fine. Now, here's where it gets tricky so stay with me... Initially, when I hooked up the brake wire from the unit to the cars' GREEN / WHITE wires, the cruise control would not activate at all. However, when I hook up the brake wire to the purple wires in each car, the cruise WILL work, but only if you don't use the remote start prior to using it(cruise). I put my DMM on the brake wire, thinking that maybe it's throwing out a pulse, some resistance or something, but nothing moved. I even went so far as to swap out brains with new units, but the same thing happened. So I'm stumped at this point. Anyone care to jump in and interject with some words of wisdom, tips, or just to throw me a bone, that'd be great!! And if you need any further info on what I'm doing (or NOT doing), let me know and I'll provide it. Thanks, folks, in advance!G. Rick (aka; Tha "R")

**Peter North is my idol***

MECP-Certified 1st Class Installer

    Very strange problem...an Audiovox disc I have says purple no cruise, WHITE/ grn cruise for brake wire. It almost seems like a module is not getting powered up on remote start. I'm throwing bones now.....what if you cut the WHITE/ grn, put thru relay 87a & 30(30 at brake pedal side) 87 to remote start brake wire, 85 to -ve out when running on remote starter, 86 hot, that way you would think the cruise brain would be totally isolated from starter brake wire....just a thought ..Rich

you could also diode isolate the brake wire, possible the alarm is sending a signal to that wire I would place a diode in the brake wire going to the alarm with the stripe facing the alarm.  Just a thought

First, thanks for posting this as I am in the middle of an install on a 2000 mazda 626 (ultrastart). I can verify that the 4 cyls do have a transponder as this car most definitely has one. I believe that the idea of back feed is a logical conclusion and using a diode is he first thing I would try as it is the simplest.