Where is pin 86 on a fuel pump?
Being that pin 86 is wired straight to the battery this will send a nice, clean voltage straight to the battery with no other obstructions to the fuel pump.
What kind of wiring do you need for a fuel pump?
At the wiring you need to find the 12v supply wire from the ECU to the fuel pump. Once that wire has been found cut that wire so that you now have half of that wiring running to the fuel pump, and the other half running to the factory ECU. Choosing a Relay The relayyou need should be a four-prong relay with at least 14-gauge wiring.
What are the pins on a fuel pump relay?
The relay should have 4 pins on it. They are usually labeled 30, 85, 86, and 87. Steps: 1. Wire pin 85 of the relay to the 12v supply wire from the stock ECU that you just cut. This 12v wire will now energize the relay to turn on. So now instead of the stock ecu energizing the fuel pump, it will energize this relay. 2.
Can a loose wire ignite a fuel pump?
Electricity should not be taken lightly. A spark from a loose wire can ignite fuel vapors resulting in a major catastrophe. Be careful. The first tip for wiring a fuel pump has to do with the electrical connections on the pump itself.
At the wiring you need to find the 12v supply wire from the ECU to the fuel pump. Once that wire has been found cut that wire so that you now have half of that wiring running to the fuel pump, and the other half running to the factory ECU. Choosing a Relay The relayyou need should be a four-prong relay with at least 14-gauge wiring.
Where does the fuel pump go in a Mercedes 190E?
It enters the filter (green arrow) and exits the filter (orange arrow) and is sent to the engine. The other silver unit in the picture is the fuel accumulator and is used to maintain pressure in the system when the car is turned off.
How do you wire a fuel pump relay?
Wire pin 85 of the relay to the 12v supply wire from the stock ECU that you just cut. This 12v wire will now energize the relay to turn on. So now instead of the stock ecu energizing the fuel pump, it will energize this relay.
Being that pin 86 is wired straight to the battery this will send a nice, clean voltage straight to the battery with no other obstructions to the fuel pump.