At Fixya.com, our trusted experts are meticulously vetted and possess extensive experience in their respective fields. Backed by a community of knowledgeable professionals, our platform ensures that the solutions provided are thoroughly researched and validated.
The fuel pump is not getting current at the base. but the fuses , relays all work and we have current except in the base of the fuel pump. what could be the problem?
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
Fuel pump relay , maybe . Inertia fuel shut off switch tripped .Does the vehicle have spark ? No signal from the Crankshaft position sensor ,the PCM - engine computer will not energize the fuel pump relay . Video's on youtube ,testing fuel pump electrical circuit from the relay base , where the relay plugs into .
Fuel pump fuse # 48 15 amp ? Should have B+ voltage with the ignition switch on . There is a ignition relay that supply's B+ to fuse #48 . Ignition relay and fuel pump relay or both located in the under hood fuse / relay box .
The fuel pump is powered from a relay. That relay is powered by the engine's computer ("ECU"). The relay is necessary to scale the low current control signal from the ECU into a high current switch to operate the fuel pump. The high current circuit will likely contain a fuse. That fuse or the fuel pump relay may be defective.
The fuel pump relay is activated for a few seconds when the ignition is turned on before starting the engine. If everything is working properly, you should be able to hear the fuel pump run for those few seconds before starting the engine. This is so the injectors have adequate fuel pressure before the engine is started.
Could be that the fuel pump relay is bad, have you switch out the fuel pump relay with another relay of the same specs. If that doesn't work, then check if there is another fuse that related to the fuel pump, could be like those fuse under your kick box panel if it is blown. If not, you could have bad fuse box.
the relay. Try swapping the fuel pump relay with the wiper relay. These are in the engine compartment relay box. If this doesn't help, please get back to me.
Have you checked the 'inertia switch' which in the event of an accident shuts off the fuel supply to prevent a fire . It's usually located in the cab on pass. side. Some models have one reset button, some 2 which have to be pressed at the same time. If that's not it, here's how the power to the pump SHOULD work, you will have to follow the path to see where it stops. When you turn the key on it turns on the EEC power relay on, this relay then provides power to the PCM (power control module) and the control side of the fuel pump relay. Power for the fuel pump is supplied through a fuse link or high current fuse attached to the starter solenoid (battery side). From the fuse link or high current fuse current flows thru the fuel pump relay and inertia switch to the fuel pump. The fuel pump relay is controlled by the PCM. When the ignition switch is turned on the fuel pump will operate, if the switch is NOT turned to start position, the PCM will shut off the fuel pump off after 1 second. This is to avoid flooding the engine when it is not running, just key on. So check out to see if you have a fuse link or a high current fuse and if they are blown.
×