fuse size

I normally fuse my connections at 20 amps for accessory items and 30 amps for unit power.

The door lock/unlock wire only has about a 10 amp output so I would only use a 15 if you have to. I normally don't use a fused connection on the door lock wire because the current draw is so minimal. The accessory items that I was speaking of was the light flash, heater/AC, second ignition, etc..... that uses more current that require more than 20 amps of power. Remember that most of the wires in vehicles today are between 18 - 24 gauge and they all are fused at between 5-30 amps for the most part , so I wouldn't be scared about fusing at 15 amps on the wire above as the circuit is not a heavy loaded wire.

First off, what make, model and year car do you have ? I will try to help you out but I can't remember if you listed this information in a previous post or not ?

First off.... does the unit that you have output both a ( - ) and ( + ) signal from the doorlock circuitry ? If the unit only outputs a ( - ) output you will need to intall 2 relays to convert the signal into a positive system. If the unit has alternating polarity system then all you need to do is to hook up the following wires to the respected wires on the alarm module:

Test each wire for circuit verification to ensure that you do have the right wires and that they are positive type lock system.