Why does my ECM B fuse keep popping?
ECM B is the fuel pump relay circuit, if I remember correctly. It can be the circuit that activates the fuel pump relay, or the relay itself. It might also be the fuel pump inside the tank drawing more current than it should. You may want to try leaving out the ECM B fuse and jumping the power lead on the relay – then try to start the truck.
Is the ECM B fuse the fuel pump relay?
Yes, in fact it is EXACTLY backwards of what most people think it should be. It is designed this way to limit the amount of current going through the gauge/sender. ECM B is the fuel pump relay circuit, if I remember correctly. It can be the circuit that activates the fuel pump relay, or the relay itself.
What to do if your ECM power relay is failing?
For this reason, if you suspect that your ECM power relay may be having an issue, have the vehicle inspected by a professional technician, such as one from YourMechanic, to determine if the relay should be replaced. The most popular service booked by readers of this article is Vehicle Engine Electrical Inspection.
What happens if the ECM fails on a car?
The fuel and ignition systems, as well as several other engine management functions, of many vehicles are controlled by the ECM. If the ECM or it’s relay fail, the entire engine management system will be left without power and will not function as a result.
Why does my ECM 1 fuse keep blowing?
If the wires leading to the O2 sensor rub against the exhaust, it creates a ground; once the O2 sensor is grounded, the fuse to the ECM 1 blows. The O2 sensor must be installed in a different place to ensure the wires do not short-circuit.
For this reason, if you suspect that your ECM power relay may be having an issue, have the vehicle inspected by a professional technician, such as one from YourMechanic, to determine if the relay should be replaced. The most popular service booked by readers of this article is Vehicle Engine Electrical Inspection.
What should I do if my Chevy ECM is not working?
However, if you want a source with a stronger sense of authority, you should obtain a repair manual for your Chevrolet’s model and year. A repair handbook will also tell you, in detail, how to remedy problems with the ECM, Consider taking the vehicle to the a General Motors approved mechanic.
What causes a battery to go dead on an ECM?
Battery drain or dead battery A failed ECM power relay can also cause a battery drain or dead battery. If the relay shorts it can leave power on to the computer, even when the vehicle is turned off. This will place a parasitic drain on the battery, which will eventually cause it to go dead.