89 SR Rear Hatch won't open!

I went to open the rear hatch to check the battery hold down fitting but when I pulled up on the passenger side actuation knob, all it did was buzz, indicating it was trying. The latch apparently would not release. Normally, I would hear the buzz and then the release click. After repeated buzzing attempts, it would no longer buzz. Did I blow a fuse? If I did, where on the fuse board is it located and what is its amperage? My driver's manual states that a fuse chart should be on the floorboard but it is missing and I don't have access to fuse board chart. When i purchased the car, the driver's side actuator didn't work but the passenger's did. Are they on two separate fuses? Is there an alternate way to open the hatch manually?

With regard to my previous submission, I have concluded that it is not a fuse problem. After charging my battery several hours, I tried to open the hatch again and got the buzzing sound like before, so it is getting an electric impulse. I also tried opening the hatch with my key. The key turns but nothing happens. My only guess is a disconnect between the opening solenoid and the mechanical locking mechanism. Does the key operate the solenoid or the mechanical lock? Any other ideas? How would I open the hatch to change the solenoid if that is the case?

The key should work without any electrics as it's turning a mechanical lock. You need to turn the key clockwise in the lock. If it doesn't open then put some downwards pressure on the tailgate whilst you're turning it.

Finally got the hatch open. It turns out it was a combination of items. I climbed in to the trunk and removed the tool board. Discovered one of the two wires attached to the latch motor was disconnected, which is probably why the driver's side knob hadn't worked since purchase. I observed motor run with the articulating arm moving up and down, the internal spring completely compressed, but no opening click. I loosened the two bolts that hold the motor and moved the unit about a 1/4 inch down and after trying from the driver's side, "CLICK" it opened! Now I have both switches working and a lock that operates. With regard to previously using the key, even though advised it is a direct connection to the mechanical lock, that didn't work.

Spent the last few days analyzing my stuck closed rear hatch problem. Was able to solve it by adjusting motor position. Now I seem to have blown a fuse, as I am absent the normal whirring sound when the switch is pulled and of course the click that accompanies opening. I need to locate the fuse and identify its exact position on the fuse panel to determine if it is now an electrical issue.  Since I am a newbie, I don't have an electrical diagram sheet or work manual.  The hatch key still won't release the lock!

Is the key turning in the lock?

Here is a link to an S4 wiring diagram ... www.cardiagnostics.be/-now/PIWIS_bestand...agram%20-%201991.pdf

And the fuse / relay diagram ... www.928intl.com/repair/Relay/laterelay.htm

I printed the fuse one out and stapled it to the wooden fuse board cover.