When you use one of the hatch release switches can you hear that relay you replaced make a click?
If you do hear a click the problem is usually a bad ground connection inside the hatch release solenoid.
Below is a link how to fix it. You do have to open up the metal housing and resolder the ground connection.
To test the solenoid unplug the two pin connector. Apply 12 volts and ground direct to the solenoid and it should activate.
You can also use an ohm meter and measure across the two pins and verify there is low resistance across the solenoid pins.
If you don't hear a click from the relay.
Verify you have 12 volts on the Orange wires at the relay which are hot all the time. The 12 volts comes from the Hatch fuse located on the passenger side end of dash fuse box.
I don't have documentation for a 94 but do have the schematics for a 93 and 95 which use the same circuit but some of the wire colors are different.
To test the relay on a 93 ground the Brown wire. The relay should click/energize,
On a 95 you ground the Light Blue wire. The relay should click/energize. If the relay clicks that points
to a bad hatch release solenoid.
This is what the hatch release solenoid looks like. Don't confuse it with the hatch release relay.
Here's how to fix a defective hatch release solenoid.
15 cent Rear Hatch Solenoid Repair... - CorvetteForum - Chevrolet Corvette Forum Discussion
Hopefully someone will be by soon to answer your question. CAC is full of very knowledgeable and helpful people! Quite honestly, I don't remember about how to do it. I haven't had a C4 in 8 years.
