93 yota fuel pump

does anyone know why my fuel pump doesnt work when hooked to factory wiring but when i hook 12v up to it it works. all fuses are good im stuck.

possibly a relay is bad or either you have a broken or bad connection in your factory wiring.. just ya fuse boxes and look at the relays and there might be something there to check if not just look under the truck and check ya wires..

1st what kind of pump is it after market or stock. 2 what do you mean by not working not turning on or not starting the engine. if its aftermarket the motor needs around 36 psi of fuel at idle. second the pump doesnt recieve electric until air is already flowing through the mass air box, after the motor is turning over, not as soon as the key is switched on.

the one on my toy would cut on briefly when i switched the ignition on...

well i dont know wtf is going on, the truck was carbed and i took all the fuel injection and wiring and stock pump off a 93 and its got spark and i know the pump works the truck just wont fire

also when i click it to ign on the charge light does not come on but all the others come on like brake check eng and oil

prolly that relay. mine did the same thing but i couldnt find were the relay was at first so i just hooked it up to my tail lights.

ok when I changed cabs from my 94 to the 89 cab I had the same problem. My prob was I did not use everything from my 94 I used some 94 stuff and some 89 stuff just make sure that everything and I mean everything is for the 93 if not it will not work. There is allso a efi fuse in the dash wireing in a little black box on the right kick panel make sure that is good. The one thing that I know that is differant is the dash fuse panel for year to year. there is something inside of those things that makes them differant they look the same but they are not the same. only thing is what year truck are you trying to put this into?

oxymoron where did you locate the fuel pump relay in your truck. ive got a fuel pump problem in a different tread in the toyota sec maybe some one can help me out thanks.

circuit opening relay is bad its located in the passenger sidenext to the blower box