im getting ready to install a clifford rsx 3.5 alarm and was wondering if it is easy to install power door actuators. Will i need a seperate relay and if so how many? or i can just plug it into the alarm??

 

Into which car are you planning to install them?

And yes, you will need relays, and no you cannot plug them into your alarm.

 

89 crx dx, how much relay will i need?

 

What you need will depend on what you put in for door lock actuators, normally the least expensive way is to install a 2 wire actuator in each door, run the 2 leads from each door the the same spot under the dash or one of the kick panels, there you will need to install 2 SPDT relays, [one for lock and one for unlock, and wire them like this... http://www.the12volt.com/doorlocks/page3.asp#arp

The other way to go is with a "Central" locking system, they come is diff. configurations, but all will come with at least 2 actuators, [one 2 wire and one 5 wire, (drivers door)] and a "black box", [relay and circuitry box] a 5 wire actuator has a switch in it that sends a lock or unlock signal to the "black box" the "black box" then locks or unlocks the other door. EG: if you lock the drivers door with the key or the manual door lock button it will also lock the pass. door, if both actuators are 5 wire, then locking or unlocking the pass. door will also lock or unlock the drivers door, [Central Locking], the "black box" will also have, [at least] a set of low current neg. (-) inputs, [for the door lock outputs from the Matrix RSX 3.5.
The advantage of a central locking system, [especially one with 2 five wire actuators] is you can lock and unlock both doors using a key or the stock manual door lock buttons, [no switch's have to be installed] and the polarity reversing relays are already wired, [black box] 94