2000 Rear Window Defrost Problem

[john_brandon]

Before surgery, I would try two things. First, make sure window is ALL the way up. I am pretty sure it has the same defeat link as the wipers to prevent operation except when 100% closed. Second, verify the fuse and relay in the engine bay. (The indicator light might be run off a dash circuit and just show that relay coil circuit is energized, while the load circuit is completely dead--probably is that way, as there is no good reason to route load wire through dash. Pull the relay if you don't believe me, I bet light still goes on.) If fuse is good, swap the Defog and Pwr Outlet relays and see what that does to each circuit. They are the same p/n relay (at least on a '99 w/o mirror defrost).

Only then would I open up the gate.(Actually, I would also verify coil and load 12+ at relay socket and load to ground resistance, but that's me).

Old thread, I know, but can't figure this thing out and looked for more recent posts.

I've checked the rear wiring harness, rear wiper works, rear window rolls up and down with the dash switch and key in the rear door. All that checks out fine. I tested the leads to the rear window, no voltage there. I checked the engine bay rear defog relay and found there is no power to the relay. What would cause this? The under dash relay?