88 silverado 1500 w/door relay issue

you should be using a 30/40 amp 5 pin relay and wired as follows:

1st relay pin 85 (-) unlock from alarm, pins 86, 87 to +12v, 87a to switch side of unlock wire, 30 to motor side of unlock wire.

2nd relay pin 85 (-) lock from alarm, pins 86, 87 to +12v, 87a to switch side of lock wire, 30 to motor side of lock wire

Standard automotive SPDT relays rated at 30 amps should do it.

Wiring should be like the Type C diagram shown on page 8 of this guide:  http://www.bulldogsecurity.com/pdf/RS102_112_122.pdf

or

This site has the wiring diagram also:   https://www.the12volt.com/doorlocks/page3.asp#5w

If just plugging the +12 volt supply fuse to the relays gives a constant unlock output, it sure sounds like the unlock relay is mis-wired.  The relays should be transparent and should allow normal lock operation ( pin 30 to 87a ) with no lock / unlock signal coming for the Viper unit.  Did you check the unlock output from the Viper.  Maybe that is the reason  the unlock relay  goes active when you apply power.