I dont have power on a 89 camaro rs fuel pump

First of all you will only have voltage for 2 seconds after key is turned on from the fuel pump relay. after that when you begin to spin the engine over oil pressure then builds up and closes the contacts on the oil sending unit causing the fuel pump to stay powered up as long as it's spinning or it's crunk and running.
so while you check for power on the tan with white stripe at fuel pump , have someone bump the engine over, if you have power up until about 2 seconds after they let off the key then check ground to pump if it's ok then you'll need a fuel pump.
If you don't have voltage when it's spun over then check the red wire coming from the oil sending unit the same way you checked it at the fuel pump.
If you have voltage then check inline fuse beside the battery. if fuse is'nt blown then check for broken wire from there to fuel pump.
If you don't have voltage from red wire at oil sending unit then check for voltage on orange wire at sending unit, if you have voltage on the orange wire and not on the red wire while someone is spinning it over then replace the oil sending unit.
If you wanna do a quick check that makes sure your relay isn't the problem Go to your 12 way diagnostic connector under dash by stearing wheel. and touch a battery hot wire to pin G if relay is ok the you should hear the fuel pump come on.