Hello, I have a set of 99 Civic Si OEM power door lock actuators. Was wondering if I could wire these up to a 451m relay for my 99 civic hb (manual door locks), without using the cheap aftermarket ones. Car also has a viper 5706v installed, in which I hope to have keyless entry, which is why I am looking at installing power locks.

If it is possible, which color wires on the OEM locks is unlock/lock?

Did a few research and most people are using the aftermarket ones, haven't seen anyone use the OEM ones yet.

 

Yes you can, as long as you do not want/need "central locking" like the Si has/had, for "central locking" you would also need the Door Lock Control Unit from the Si and a lot more wiring.

Are the actuators one piece latch and lock actuators?
If so how many wires and what colors are they? 94

 

That is interesting, I don't know what you mean about "one piece latch/lock actuator" however the actuator I have does have two part. The first part is the motor/gear, and the second part are just the three latches. There are only two wires, yellow/red and white/red. When you say a lot of wiring what do you mean by that? Isn't it supposed to be straight forward; one wire is to unlock, and the other is to lock?

I do have a Control unit, however it is the blue box one which was from 96-98 I believe.

 

They look like this... 96 97 98 99 00 Honda Civic Door Latch Actuators Set of 2 Coupe Power | eBay

If as you say there are only 2 leads, just run power and ground to the leads to find out what lead is lock when power is supplied to it, door lock actuators are polarity reversing both leads are needed for lock and/or unlock, one lead gets power the other gets a ground to lock reverse that and you get unlock.
They are also "ground at rest" meaning both leads are grounds when not switched, to wire you need two SPDT relays, one wire from each actuator goes to #30 of one relay the other two wires go to #30 of the 2nd relay, #87a of both relays are grounded, [chassis ground], #s 85 and 87 of both relays go to a 12V+ [ fused 12V+ constant] that leaves #86 of both relays, one gets a lock signal, [green] the other an unlock signal, [blue] from your alarm. 94