The Cherokee Laredo usually has an electromagnet in the relay box to close or open the circuit in the fuel pump relay. When it is faulty, it will make more attempts to click on or off and that repetitive process causes the annoying clicking sound.
Check the fuel pump relay.
Yes; if your fuel pump relay fails you will not get fuel to your motor and your vehicle will not start.
Not if it has an electric pump and a relay.
Yes, along with many other causes a bad fuel pump relay can cause a no start. The fuel pump relay provides power to the fuel pump.
If the fuel system is still holding pressure the car will start and run until the fuel runs out, The relay turns on the fuel pump.
Check the fuel pump, fuel pump wiring, fuel pump relay and fuel pump fuse.
A fuel pump relay switch can cause your car to stall after starting. A malfunctioning fuel pump relay switch can cause your car to not start at all.
The fuel pump relay is also the fuel shut off relay. When you turn the key on, the fuel pump should run for 2 seconds then shut off unless the car starts. Easiest way I've found is to use starting fluid (ether) SPARINGLY! If the engine will start after using ether, then die, it's probably the fuel pump.
The fuel pump in a 94 Lumina should not be running with the relay removed. The relay could be mislabeled, as the fuel pump is still getting power through a relay.
Check to see that the relay is coming on first off. Touch the relay and have a helper turn the car on (not crank) You should feel the relay click. If it isn't clicking, then the relay is not coming on. If you want to check to make sure your pump isn't the problem, you can bypass the relay and try to start your car. Also make sure that you are getting spark. If you have spark but no fuel then your problem is a fuel delivery problem. There are alot of things to look into when it's a fuel problem. But start at the relay. That is what primes your fuel pump, then turns it on. Most likely if it's a new fuel pump, it isn't the problem, but it's always a possibility. An electrical problem could also be in the picture. And I;ve found that on my camaro, it is usually the problem.
I suspect you have a short in the related wiring harness.