Car down for weeks now. Stumped. Any advise for a 93 Honda Accord EX? Replaced fuel pump. Verified it HAS FIRE. Plenty of cranking ability (battery). REPLACED MAIN RELAY already. Went to verify fuel in fuel rail & realized that fuel pump tested NO POWER. I THINK that kicks the lack of power to fuel pump problem BACK to the MAIN RELAY which has already been replaced. No obvious wire connection issues on connector of main relay. WHATS NEXT? Replace the wire from Relay to Pump? Please say thats NOT the case. Could it be the cars "brain/computer" or whatever its called?

 

I would unplug the main relay and do the tests on the electrical connector for the main relay. The common DIY thread on top of the gen tech help forum has a link for online shop manuals. The honda-tech site has the manuals.

The 94 accord manual is better. The 94 uses the same fuel relay as your 93. The wire colors may be different, but the position on the plug will be the same. Let us know if you are missing voltage or ground on the appropriate tests.

 

you could always just make yourself a kill switch. Get a powered toggle switch and run power directly from the bat. You will just have to flip the switch off when you get out of the car or you will burn up your pump. There are a few write ups online. Google it if interested. I know you must use a certain amp switch and gauge wire. You can find write ups like this on allot of civic forums. It's all the same stuff.

 

g- if you were going to hot wire it, why not use a "key on hot" wire? That way you don't "have to remember" to turn off the pump....piggy back off the key switch, with an inline fuse of course, and bam-done.......just wondering.

OP-Fuse? What were the input tests of the main relay?