I have a 2004 Honda Accord ex with a jerry-rigged "kill switch" in it, while it's on, the car starts fine but the battery drains when the car isn't running, but when the switch is off, the car doesn't start (I believe it cuts power to the fuel pump). I've tried to remove said switch but then the car wont start (same fuel pump situation). I could leave the switch off while I'm not using the car and turn it on when I use it but I'd rather just get rid of it. The switch itself is connected by one wire going to ground and the other connecting to a wire near the computer (it's red with a thin black line and silver rectangles), but ones I've seen on online usually have three? Any info will help!

Ground wire

Other wire connection

Other wire connect

 

You posted in the wrong sub-forum (Civic); so, it was moved here.

Since the Red/Blk wire was not cut; but, spliced into (wire still intact); the switch is probably not a kill switch.

The Red/Blk wire is the relay control wire that goes to the PGM-FI Main Relay 1. The ECM/PCM needs to send a ground signal to the relay coil; which will then supply power to the fuel injectors, sensors, etc. Main Relay 1 works in conjunction with Main Relay 2 (which supplies power to the fuel pump).

The probable reason the switch was wired to ground is most likely due to the ECM/PCM not functioning correctly and not sending the ground to the Main Relay 1. With that added switch to supply the missing ground, the relays will constantly supply power to the injectors, sensors, etc.; thereby draining the battery unless the switch was manually switched off.

If the ECM/PCM was functioning correctly, you can just remove that switch wire and tape up the exposed wiring on the Red/Blk wire. However, most likely there is some issue with the ECM/PCM.

 

Alright, it all makes sense now, thanks for this info you have been very helpful!