used car with alarm, 04 tundra, code alarm

j.w.-

  Great diagram...this will help debug what is happening.   This is what I see:

   1.) Relay on the left side of your diagram is the lock relay--this is hooked up correctly.

    2.) Relay on the right side is your unlock relay, and this wired incorrectly.  Instead of using 2 diodes, the unlock looks like it was hooked up with 1 diode and a relay...not sure why it was done this way, but this setup can be made to work.  Here is what you need to do to correct it. 

                If you trace back the blue and black wires connected to the unlock relay pin 85, I'll bet blue is going to CA425 negative unlock signal (Blue from the Brain's lock/unlock connector).  My guess is black wire is going to ground.  You need to confirm this.   If this is the case, remove ONLY the black (Ground) from pin 85 (leave the Blue unlock signal from the brain on pin 85) and connect the black wire to pin 30.   

You end up with the following connections on your unlock relay:

   Power (+12V) on Pin 86

   Remote Start negative unlock (blue from Brain Lock/Unlock connector) signal on pin 85

   Diode from lock detect and vehicle unlock signal (light green and RED / silver) on Pin 87

   Ground on Pin 30

j.w.-

  Active locking or arming requires you to use the transmitter to lock & arm the vehicle.  It should both lock and arm when you press the transmitter lock button.  Passive locking or passive arming will automatically

lock or arm (you can select either or both to be passive) 1 minute after the last door is closed, or if the transmitter lock is pressed.  

  If the doors are not locking  when you press the transmitter, I would check to make sure the lock relay is activating (you can hear the click, or feel the relay while pressing the lock button on the transmitter).  If it is not, make sure the connections to the relay are good (i.e., not loose or initermittent).   The diagram you provided is correct; if the wiring is good, you may have a faulty relay. 

j.w.-

 For the shock sensor, "light touch" is a pre-trigger/warning setting, and will not initiate a full alarm trigger, just warning chirps.  "Full trigger" is the full alarm trigger.

The Radio Shack relay is only SPST(single poll/single throw) with a normally open contact.  The relay you need for the replacement of your lock relay would be SPDT (single pole/ double throw), or SPST with a normally closed contact.  Bottom line-it won't work for your lock relay application.

As a note, I have seen 12V SPDT relays at Pep Boys--in the same display where they have Bulldog Security Remote Starters.  They are listed as 40A relays from A2C, the company that markets Bulldog.