Not getting power to the fuel pump?

Check the fuel pump relay socket pink wire if there's power nothing here and the fuel pump fuse is good the pink wire is open between the fuse and relay socket

the fuel pump fuse is in the relay panel under right side of dash. 20amp fuse we enjoy your feedback

ran out of gas on 1999 deville, will not start. changed fuel pump and filter. not getting power to fuel pump. cannot locate fuel pump relay. can you help?

correction that car has 115000 miles.

The fuel pump relay is in the underhood fuse block, in front of the left front(driver) strut tower. It is either under the flap that provides access to the mini fuses, or you need to remove the plastic cover. There will be a sticker on the underside of the cover, the legend for the fuse relay center.

found it guys, Thanks! I tried to swap the replays but still won't start. need to have a mechanic trouble shoot the electrical sys. a neighbor said the fuel pump has no power. might be a modulator?

can a fuel pump relay or fuse cause fuel from flowing to engine

yes, if fuel pump relay or fuse is bad then it will not let the fuel pump get power to be able to pump fuel to engine..

Electrical problem V8 Two Wheel Drive Automatic

power works for a few seconds on one side but other side has no power.

The few seconds is normal as the ECM controls the relay to build rail pressure in anticipation of cranking. Check the fuel pump fuse in the underhood fuse center. If it is blown, you could have a short, but it is more probable that the fuel pump has high resistance and is drawing too many amps and opened the fuse.

I changed the fuel pump relay and fuse and I’m still not getting any fire to the plug ! What should I do

hello,

Here is a wiring diagram that show where the power is coming from which looks like a fuse. Here is a guide on how to check for power

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

Check out the diagrams (Below)

Please let us know what you find.

Cheers, Ken

Electrical problem
1997 Cadillac Deville V8 94000 miles

My 97 cadillac Deville shut down while driving and i had the fuel Pump replaced. but the problem is that i can not get fire to the fuel pump. a gas rag at the throttle body will start the car until the fumes runs out i replaced the relay and checked all fuses and cannot get fire to the tank.

Could be the computer fuel pump control circuit of the relay, also check the oil pressure sending unit.

Do this diagnostic. You will need a DVOM (Digital Volt/Ohm Meter for this.

my 1996 Cadillac Sedan Deville is not pumping gas into engine, I have change the battery and the fuel relay and now there is no curint going to the relay. What could be stopping the curint from going into relay?

If there is no power to the relay, check to make sure the wiring under the relay block hasn't come loose. If it is good, you need to trace the wiring until you find where the break is located.

Engine Mechanical problem
1993 Cadillac Deville V8 Front Wheel Drive Automatic

Car just died and now will not start. Will crank over but now fire. Pulled the fuel line to make sure getting fuel but only get pressure for 2 seconds then no fuel. Would this be the pump or maybe the relay??? Thanks for the help

It suppose to prime the engine for 2 secs-check the fuel pressure with a gauge and comeback with the readings

I am getting good pressure for the 2 seconds 44# but no fuel after the frist brust of fuel.

That is normal to build rail pressure, if there is no continuing rpm signal the pump is shut down. You have only checked one avenue. You need to check spark, and if you have spark, check that the injectors are firing.

i have got a 1983 Cadillac Coupe Deville and I am having trouble with the fuel pump. when i go to start the car it really wants to turn over, but the fuel pump won't turn pump gas to the engine. But if i put gas in the carberator then it will try to run off the gas i put in the carbirator.
we have gotten it once to run off the gas i put in the carbirator. i am debating if it is the fuel pump, fuel pump relay, or a blown or missing fuse. the problem comes, because i don't know which relay is which. can someone please give me some suggestions on this subject?

do a fuel pressure check. in most cases, it is the fuel pump itself that has failed.

Roy

OK THANK YOU I WILL LOOK INTO THAT

i had the same car back in my cadie yrs. do u hear the pump run when u first turn the key on?drop the r/side under dash panel.u will see a relay panel with fuses in it.there is a 20 amp. mini fuse their marked fuel pump.use a test light or volt meter to check that voltage is there and the fuse isnt blown.we can start here.kk

ok thanks cadieman. i will look into that and tell you the results when i can thank you. it might be a week or so before i can do it cause im busy so please keep watching for my reply

np gl ill be here.

hey cadieman. I am sorry I have not replied in a while. ive been working on my 1983 Cadillac Coupe Deville. I changed my fuel pump.
It actually runs now. but I have 1 question. how do I clean the digital fuel injectors in the throttle body?

add Lucas fuel system cleaner. He

ok i will cadieman. thank you for your help. we are still working on the car. lol

Fuse relay block is under the back seat.
I'm new to this forum. Working on a 99 Cadillac STS 4 door. Similar story as above. Fuel pump replaced. Ran fine then he let it run out of gas. Now now power at the pump. Fuse and relay are good. I did swap the relay jic. Probing the relay block I get constant 12v for relay but no voltage for relay control circuit. I power probed the fuel pump and checked fuel pressure 39 psi. Tried starting it with power probe on fuel pump. Cranks well but no start. I wonder if the computer needs a signal to fire up?
Tomorrow I'll check the drkgrn\wht wire for power. Where does the green and white wire get power? I want to check there.

Welcome to the forum, make sure the pink wire tot he relay has power, then the drgrn/wht wire is the trigger from the ECM. If the crankshaft sensor or MAR sensor is not working the engine will not start. Please check out this video it can help us get started to fixing the problem.

https://www.youtube.com/watch?v=lXLJbuAZ4CE

Please let me know what happens.