Fuel pump relay location

The fuel pump relay is located under the dashboard of the car right next the fuse panel. Depicted in the included photo, is the exact replacement relay for a 1994 Honda Civic DX, and should look like, or similar to, the one located by the fuse box.

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It seems your ignition switch has burned out - verifying good starter operation was an important component in furthering your diagnosis effort. The ignition switch is really a relay separate from the ignition key cylinder - when it fails to send battery voltage to the starter motor, you'll have the no-start condition described.
See the Honda Ignition switch replacement illustration below.

Just for completeness' sake, here's the generic response of a mechanic to a vehicle's no-start condition:

Priority Action Part Type Cause
1 Inspect Ignition Switch - Improperly Connected or Faulty Ignition Switch.
2 Inspect Battery - Battery Discharged or Faulty.
3 Inspect Battery Cable - Coroded, Broken, Shorted or Poorly Connected Battery Cable.
4 Inspect Solenoid - Starter Solenoid Faulty.
5 Inspect Starter - Starter Motor Faulty.
6 Inspect Wireset - Worn or Damaged Spark Plug Wires.
7 Inspect Ignition Coil - Faulty Ignition Coil.
8 Inspect Distributor Cap - Loose, Cracked or Worn Distributor Cap.
9 Inspect Spark Plug - Incorrectly Gapped or Fouled Spark Plug(s).
10 Inspect Distributor Rotor - Loose, Cracked or Worn Distributor Rotor.
11 Inspect Fuel Tank - Fuel Tank Empty.
12 Inspect Carburetor - Worn, Faulty or Damaged Carburetor.
13 Inspect Fuel Pump - Faulty Fuel Pump.
14 Inspect Choke - Stuck or Improperly Functioning Choke.
15 Inspect Fuel Filter - Clogged or Dirty Fuel Filter.
16 Inspect Fuel Pump Relay - Faulty Fuel Pump Relay.
17 Inspect Fuel Injector Pressure Regulator - Faulty Fuel Injector Pressure Regulator.
18 Inspect Fuel Pump - Low Fuel Pressure.
19 Inspect Engine Control Computer - Incorrect Operating Information Being Delivered and Sent From The EEC.
20 Inspect Fuel Pump Strainer - Clogged or Dirty Fuel Pump Strainer.

Illustration courtesy honda-tech.com (from 1994 Honda Civic EX manual).

http://honda-tech.com/showthread.php?t=2577784

Fuel pump is in the tank, there may be an access panel under the back seat area. One thing to check is the Main Relay. Ususally up under the dash, Left Dash area, I dont have a diagram, but you will need one to find and verify the relay operation.

Check your cold start injector, sit on top of intake.

clean the tank because a lot of sluggish rubbish is going through the injectors

check the ignition switch do you have allot of keys on your key ring the weight of having too many keys on your key rings will wear out your ignition switch in a short time

Well first of all it sound like your fuel pump is dead, To get to your fuel pump you need to take out the back seat out because it is located under it in the middle. Or you can drop the gas tank to get to the fuel pump. And the relay switch should be in your fuse box Now if memory serves me correctly you should have 2 fues boxes in that model. Check the engine area for that relay for the fuel pump.

I would talk to who cleaned the injectors, I don't know if it something they did or not. It could be a stuck open injector. The exhaust would have a raw fuel odor if it was. What it sounds like is a blown headgasket, which can just happen. The exhaust would have a sweet smell to it. Usually starts as a small leak (between cyl. 2 & 3), the engine burns the coolant while driving which you don't see. Then the coolant level gradually drops to a point where the car overheats, which warps the head, causing a large leak. Now you see the coolant burning (white smoke).
Good luck Honda Al

replace fuel pump, or clean injectors with stp injector cleaner

its wiring phone the dealer ask for work shop pick there brain. best way.