Why does my ECM B fuse keep blowing?

ECM B blow is because the harness is grounding/shorting. DO NOT drive the truck until you change the oil pressure switch. After you change the switch,you should spend sometime to inspect the wiring between the fuel pump relay,ECU and fuel pump.

What is the ECMB fuse?

The ECMB fuse gets power at the ECM and gives it to the oil pressure switch. And if it has pressure there it goes to the fuel pump relay.

Where is the fuel pump relay on a 1991 Chevy S10?

Registered. 1991 S10 2WD P/U V6 4.3 – Facing the the front of the vehicle, there are two relays mounted next to each other on the firewall driver’s side.

Where is the fuel pump relay located on a 1996 Chevy S10?

The Fuel Pump Relay is located in the Glove Box under a little cover on the upper left side.

What is the ECM B fuse for?

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.

Where is the ECM fuse located?

The power distribution center, or fuse block, located under the hood houses most or all of the vehicle’s fuses and relays. It contains a relay for the ECM that is powered up when the ignition key is turned to the on position.

How do you test a fuel pump relay?

How to test a fuel pump relay

1. Park the car in safe and level ground.
2. Step 2: Turn the ignition key in the ON position but don’t start the car.
3. Step 3: Raise the hood and locate the fuel pump relay.
4. Step 4: The fuel pump relay will emit a clicking or buzzing sound when turning the key in the ON position.

Where is the fuel pump fuse on a 99 s10?

Yes. Almost all vehicles have a fuse in the panel that controls the fuel pump/ECU. Look under the dash, next to the driver side foot panel.

What does the ECM control?

The ECM, or electronic control module, is the computer responsible for controlling all of the engine management functions. It is the central control unit of most vehicles and controls a variety of functions, such as electrical system power distribution, emissions, ignition, and fuel systems.

Is there a fuse for the ECM?

The ECM 1 is one such computer; it has a fuse is installed to protect the computer from sudden power surges or other component damage — the fuse will blow before any damage can reach the ECM. Many component defects can cause your ECM 1 fuse to blow.