2008 nissan titian door lock problem

had a installer put in a viper alarm in my 2008 nissan titan. he was unable to get the remote start working but every thing else worked. went back to him today and he was removing a relay that he had installed because he said the truck didn't need it. now after he did that nothing worked properly, the doors  would not lock and unlock you could here the bcm click like it is trying to do somthing but nothing happens. i can't even lock the doors with the switch in side it is like i have manual door locks. does any one have an idea what might have happened and what might be a solution to this problem.

thank you for your help

i got the xpresskit and he installed it and every thing worked. he had installed somthing called a five wire relay and he was removing that when every thing stoped working. he reinstalled the relays and still it did not work. could he had damaged my bcm or could he have blown a fues of somthing else?

thank you for you help

It's not uncommon to five wire the door locks on a newer Nissan - you can five wire inside the car insteady of runing wires in to the doors - it's definately easier to add the two relays.

The only issue is that, unfortunately, the unlock wire inside the door is also the OEM disarm wire, so if you are doing security or a remote start you pretty much HAVE to go inside the door (or use a bypass module).

If he five wired the door locks make sure the cut wires were soldered back together.  You can then test both the lock and unlock actuator wires at rest and both should rest at ground.  Then, when you lock or unlock the doors the respective wire should pulse to 12vdc.  If something shorted out it's very possible some of the traces on the BCM were damaged - that should be an easy fix with a soldering iron.

thank all of you. i removed the bcm and check it. smelled like somthing was burnt. opened it and saw that a wire was damaged  i solder it back and now everything works. do you think i should replace the bcm or should in be fine like that?

thanks again

I personally wouldn't worry about replacing the BCM unless it starts to give you problems.  The door lock outputs of the BCM are relay controlled, so most likely it was just a switch contact and no "real" elecftronics that were hurt.