viper 5902, 2007 tahoe

On my Viper 5902, I was working to set the responsiveness of a proximity sensor. My problem wasn't that the sensor would go off too easily, but rather that when it did go off, the pre-warn beeps fast and goes straight to full alarm trigger. I then took the prox out of the picture and just touched the pre-warn cable of my viper to a ground cable. Same thing happens. The problem here is that if you were someone getting a pre-warning from my alarm, there's no time to back up, etc. It just goes to full trigger. I have a BITwriter, but don't see anyway to adjust the pre-warn time,etc or improve this. Anyone else know how to?

If I'm installing wrong, please feel free to recommend suggestions that I'm possibly overlooking.

P.S. In my testing, I have the alarm brain sitting on my car floor, and a piezo siren wired instead of normal siren. It's close by. Not sure if the siren (when pre-warn/warn-away'ing) is accidentally triggering the Brain's built-in shock sensor?

I've figured out the warn issue. The driver door trigger input I was using gives a 3 second warn but is (correctly) supposed to go straight to trigger after that. Only the shock sensor (which on a 5902 is internal) does a true warning without full trigger on lighter impacts. I wouldn't have a problem with opening up the 5902 and soldering my motion sensor to the inputs of the shock sensor (in place of the shock sensor), but without a wiring/board diagram, that's a bit much to undertake without risking the brain. I'm thinking I will use the AU94T for internal sensing only and thus if it's hard triggering, it will be because it should be triggering at that moment (i.e. someone's in the car for sure). As always any new ideas or comments can only help.

What's an AU94T?

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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.

Prox sensor is supposed to plug into a dedicated port on that unit.

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COMMIT YOUR WAY TO JEHOVAH AND HE WILL ACT IN YOUR BEHALF. PSALMS 37:5

I used an XK09 with the 5902 in D2D. I wired my DEI back-up battery to the blue trigger wire on the 5902. I then used the Mux port for my tilt trigger, glass-break trigger and Autogaurd AU94T Proximity Sensor. I used diodes to separate the blue hard trigger of each sensor as they tapped into the blue hard trigger wire going to the MUX port on the 5902. I then connected the green warn-away wire from my AU94T to the other blue (warn-away) wire that goes to the MUX port. Now I have proper working Warn-Away for the prox as well as properly working full triggering for any of the sensors. The only downside of this configuration is that my remote can only show one graphic (i.e. glass break sensor, proximity sensor) and not necessarily a specific one. I will probably set it to show proximity sensor, but in any case, I'll know something's been triggered. If the sensors need any future adjustment, I'll just detach the harness of the 2 sensors I'm not adjusting from the sensor side and work with just the one isolated sensor having an issue.

I meant Crimegaurd AU94T, not Autogaurd :)

Hi Guys,

The very last step of my install is to actually stick the 2-way antenna of my Viper 5902 to my windshield. I've heard that tinting can mess with the signal and also that you want it as high up as possible. People suggest high up behind your rear-view mirror, but in my LTZ, there is some stock tinting around the rear-view mirror area and there are also some modules placed there.

In short, can anyone upload some photos of how they have their antennas placed and what type of range they get on their system. I would entertain lengthening the stock antenna to brain cable so I could place this on a rear side window, but would rather keep things simple. A picture is the easiest thing to copy

Any links to other posts/site with pictures of this in a 07 or similar layout Tahoe would help as well.

2007 Tahoe LTZ BTW

Right hand side, top of windshield. Or try it in the mirror position, I have a feeling the darkened area will make no difference.

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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.

Thanks for the input... One minor related question. The LED built into the Valet Button/Antenna module constantly blinks even when alarm is not armed and I'm driving around. It's pretty bright, so just wondering if there is a way to have it only flash when the alarm is armed. I realize that I could bypass the ground cable for the light and wire it to my "ground when armed" wire, but just wondering if there's more of a setting/dip switch to resolve this.

Just adding some more info to this post...
my Valet is just wired in using the out of the box harness (I didn't do anything custom with it). Its a black wire with a green harness that plugs into the brain and the other end plugs into the Valet light. Other than the light flashing (constantly even when unarmed), the alarm functions normally. When I arm the alarm, I will get alert if I have any doors open etc, or that my proximity sensor is active. I get correct alerts for warn-away or full triggering, and the alarm sirens act normally too, so I can't think of anything that might be wrong. I do figure that the light flashing is wrong. Not sure if it's because I have not set the Valet switch (number of pushes etc) yet, changing it from default etc, but that was my only idea. Again, I know I could splice and make it only go on when armed like the Viper luminescent light pad I also installed, but since it's plugged in per instructions using out of the box harness, just trying to confirm there's nothing wrong, and whether there's something that can be turned off or fixed in settings.

oh and it flashes like this... 3 flashes (2 second pause) 2 flashes... it does this over and over

Have you tried turning the ignition on then off?

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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.

Yes I have. to add more detail... As far as the other harnesses of the 5902, I'm only using the main harness, the on/off safety switch, the MUX port, valet console cable, D2D cable, and I have the BitWriter cable plugged in and run to a secret location where I can access it for future writing. Perhaps the brain is sensing that cable and the LEDs are because the unit is in programming mode? I wouldn't think so since the BW is not plugged in on the other end of this cable, but perhaps...

I added the H3 harness with the pink wire only (all other wires de-pinned from the harness and still not using H2 harness at all), tapping it in to the IGN on the BCM harness and this has resolved the issue. I put two and two together based on some feedback from the message boards, recalling that when I was installing my Prox sensor, I tried the green and violet trigger wires before realizing that I would need to use the MUX port for warn-away tiggering. I'm guessing since I never had this cable in place, the brain never knew that the car was on thus those triggers never cleared. Armed and re-armed several times now with re-occurrence of that triggering or LED flashes (when not armed), so everything looks good.

Only remaining problem I'd like to know is resolved is that I've noticed that even if I set my shock sensor to level 15 using the Bitwriter, it's still very tough to get it to go off (I'm trying to shake the car heavily, and throw myself into the body where it's strong... even tried just rattling the brain while I had my speedometer out to access the brain). I seem to recall when I first installed the system, just a little shake of the brain would set it off... Does something have to be reset? I have Nuisance Prevention off (using the bitwriter). Not sure what the Zap function does so wondering if that is like a factory reset, and whether that's whats needed here...