door lock problems, 2005 Suzuki Forenza

   I  have a Suziki Forenza 2005. I' m trying to install a designtech 23927 in this car but have run into a problem with the door locks. I have all the wires hooked up and everything works fine except the the lock button on the transmitter. It will unlock fine with transmitter but you can't lock. When the doors are locked and you push the lock button you can hear the locks locking but when the doors are unlocked and you push the lock button nothing happens .If anyone can help me I'd greatly appreciate it.tony stewart

Have you tried touching  a GROUND wire directly to the LOCK wire to see if it will Lock??Your may need Relays..............MO

Don't Learn from Others Mistakes

You Might Be the One That Knows.

I have touched the ground wire to the lock wire and it does lock. tony stewart

It appears the Output from your DesignTech is not strong enough & you will need RelaysMO

Don't Learn from Others Mistakes

You Might Be the One That Knows.

 How do I go about hooking the relays up?and why when I talked to design tech support they told me that my  car didn't need relays . and thiis car cannot be locked without the driver door shut do you think that has something to do with it? thanks for all the help you can give me  tony stewart

You need to step it up