2005 Impala door trigger diode isolation

Hello everybody!  First of all I want to say thanks for the wealth of information on this site.  You all really know your stuff.  Okay, here's my problem:  I recently installed a Viper 791xv in my '05 Impala.  I followed all of the diagrams, and everything worked flawlessly from the first test aside from one problem.  I diode isolated the two door trigger wires and the trunk pin from themselves and the BCM following the 1076 document and tied them all into the (-) door trigger input on the alarm.  However, I recently discovered that when the trunk is open, the display on the instrument cluster flashes between "Door Ajar" and "Trunk Open" and the interior lights are on.  Only the driver's door lights up the interior lights and causes the "key in ignition" chime, which is correct I assume.  Also, only the driver's door, the rear passenger door, and the trunk trigger the alarm from what I can tell.  This is very confusing.  Could some of the diodes have been defective or damaged?  I used the 1 amp diodes from RadioShack.  Thanks for the help!

~Randy

P.S.- If anyone needs wiring / mounting / diagram help for the 00-05 Impala / Monte Carlo, let me know.

Reviewing the Schematics in Mitchell I say that I agree with you 100% for the wires you've chosen.

LF is Blue C3/A8, (-), Door open.

RF, LR and RR is dark blue/white C3/A1, (-), Door ajar.

Trunk is RED / black C2/A11 (-)

C2 is large gray plug

C3 is small gray plug

These wires go straight from the switches to the BCM.

Just a silly question, are you connecting doors to the green wire and the trunk to the dark blue of the 791?

Now that's somewhat sneaky on Directed's part.  If I look in the installation manual at the wiring info, it says that's a multiplexed input for the second shock sensor.  If I look on the back page at the wiring diagram, it shows that as the trunk trigger.  I just found another post on here with the same problem.  Looks like I have to take my kick panel apart again after all, cuz I'd like it to show the trunk input on the remote.  Hope I didn't cut that wire too short!  lol   Anything else you can think of?   Thanks!

1) Impala's have OEM anti-grind and connecting a tach wire could be counterproductive. Program the 791 for "Voltage sense" and "Voltage sense LOW" and "2 second crank".

2) You must connect the brown acc wire at the ign switch and be sure to feed it as an acc (not ign) or she'll never start.

3)Diode isolate the white parklight wire so there is no feedback to the switch.

Better still, use the blue negative parklight signal ( bcm, gray 16 pin plug, pin a2). No relay required for the latter but be sure 791 is set for negative output.