Tests you can try:
1. With Ign. switch in the "OFF" position, plug power window relay back in.
----Unplug power window master switch and lay aside. Install good fuse in #13, turn Ign. switch to "ON" position and see if it pops fuse.
2. If it pops fuse in test 1 above, you have a short in harness between power window relay in fuse panel and the connector for the power window master switch.
Note:----ign. switch enigerizes (closes) power window relay when Ign. switch is place in the "ON" or "ACC" positions. This puts 12v (power) to terminal 87 which also puts 12v to terminal #10 at power window master switch connector. NEXT:
3. Remove (unplug) power window relay in junction block (fuse panel in dash)
-----With good fuse in #13, turn Ign. switch to the "ON" position and see if it pops fuse.
It should not.----With the relay out, and the Ign. switch in the "OFF" position, measure the voltage with your volt meter at terminal 30 where the relay plugs into the panel, it should be 12v powered all the time straight from the battery.
----Next, with the power window master switch
unplugged from the wiring harness (disconnected) using your ohm meter connected to a good body/chassis ground on one lead and the other lead connected to terminal #87 where relay plugs in, check for continuity, you should NOT get a reading. If you do get a reading between #87 to ground, it tells you have a shorted wire to ground between the power window relay on the fuse panel and the power window master switch connector. You will need to trace wire (pink/yellow no. 14 ga. wire) to find where it is touching a ground source.
4. If you don't blow a fuse with the power window relay installed and the power window master switch unplugged with the Ign. switch placed in the "ON" position, the power window master switch is bad. There is a diode in that switch that can go bad and allow 12v to go straight to ground according to the FSM. \
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