No one "tests" relays. Even if you went through all the work to set up a test circuit, the contacts often are arced or pitted and will appear to work when there is no load on them, but then fail in the vehicle when they need to pass a high current. Instead, just swap the suspect relay with one of the other ones like it.
A better test is to bypass the fuel pump relay, then observe if the pump is running. I do not know if you have GM's older-style four-terminal relays or their newer Chrysler style with five terminals. The easiest way, until you tell me which you have, is to pop the cover off the relay, reinstall it that way, then squeeze the movable contact. When you release it, if you see a spark between the contacts but the pump was not running, the motor is likely shorted or the bearings are tight. If there is no spark, there is a break in the circuit that we will need to find.
If the pump runs when you squeeze the relay contact, have a helper turn on the ignition switch while you watch if the contact clicks for one second, and again during engine cranking.
Thursday, December 29th, 2016 AT 2:44 PM