I disagree with the above post (unless I misunderstand)...in the 2L there are two separate and distinct relays for the fuel pump and blower fan. Those relays use a common power supply, but each circuit is controlled separately: the blower motor by the switch in the console and the fuel pump by the ECU.
All the round black relays are the same, they're interchangeable. It is unusual for one to fail closed, they usually fail open. I am aware (and I have) one silver relay which is a jumper wire that keeps the controlled circuit on all the time, but it is silver...
Electrical diagrams are here. Use the '74, I understand it's the same:
https://www.pelicanparts.com/914/914_electrical_diagrams.htmI suggest using the blower circuit to test your relays. Here's a link to the board; you'll notice the blower is the bottom center one. Pull the fuel pump relay (just above the blower relay, just so it's not running all the time), key on, stick the relays into the blower circuit one at a time. Reach into the car and flip the blower lever up and down and make sure they each work. If one does not work, take a razor blade and gently SLIGHTLY spread out the quarter/slotted male tips to ensure they get connectivity and try again. Mark the ones that test good. Use dielectric grease on all the terminals.
https://www.pelicanparts.com/914/parts/Elec...lectric_73E.jpgIf the fuel pump is still powered when the key is off, and you're using a known-good relay, then the problem is in the control circuit. With the key on and the engine not running, pins 85 and 30 should have 12V, pin 87 goes to the fuel pump, and pin 86 goes to the ECU. Disconnect the wiring harness from the ECU; if you have a dead ground at pin 86 then you have a shorted wire you're going to have to trace down.
Troubleshoot and report back!
Edit: just realized the relay board image is unavailable. I've attached it here.
Edit 2: Quick tip: I find it a real PITA to quickly know how the round relay fits onto the board (why make them round??) They'll only fit one way but it's still a pain to quickly find that, especially if light is low. Note on the board there is one pin location that does not have a terminal in it? That's pin 87a on the relay. So I take a silver Sharpie and mark a vertical line on the relay alongside 87a, and then a dot on the board for that empty pin and it makes an easy reference on how they go in.
Click to view attachment