![]() ![]() With the right materials and a bit of patience, you'll be able to get the job done with confidence. This is the most important part of the process, as it will give you an accurate reading of any potential electrical issues in the fuel system.Ĭonducting a thorough check of your 1986 Ford F250 fuel pump wiring can be a daunting task, but it's an important one if you want to keep your truck running in top shape. ![]() When all the connections have been inspected and replaced (if necessary), the last step is to test the fuel pump wiring using a multimeter. Replacing any faulty wires is the best way to ensure a safe and trouble-free fuel system. You should also take note of any connections that seem to be faulty or not making good contact. For example, black wires indicate ground connections, while red wires indicate power connections.Īs you work your way through the diagram, make sure to thoroughly inspect each wire for any breaks, frays, or other damage that could be compromising the integrity of the connection. Had 12.3 volts between 9&10 on the voltmeter. I ran across a post that said to go from the fpdm jump pins 2&3 to ground turn on the key and jump pins 9&10 and the pump should turn on. Pay attention to the color coding of the wires, as they tell you what type of connection is involved. Connection on back bumper you can wire 12v directly to pump. ![]() Now you know how to wire a car’s electric fuel pump. Finally, connect pin 86 to the ignition switch. Here is the wiring diagram for your fuel pump circuit I promised. Connect pin 87 to the positive post of the fuel pump. Connect pin 30 to the positive terminal of the battery. This is where the rubber meets the road, so to speak. Ground the negative post of the fuel pump and pin 85 of the relay. Once you've got the wiring diagram in hand, the next step is to trace each of the wires back to their respective components. To 12V Ignition Fused: Toggle Switch 300-230 Relay / Socket 900-000: Circuit Breaker 502-105 Ground. You'll also be able to identify any voltage issues that might be causing problems in the fuel system. This diagram will go a long way towards helping you understand the different connections between the fuel pump and the various electrical components and sensors. While the wiring diagrams are relatively straightforward, there are certain quirks that must be navigated in order to properly diagnose and repair electrical issues with the fuel system.įor those who'd like to do the work themselves, a good starting point is to get your hands on a 1986 Ford F250 fuel pump wiring diagram. But one thing that can cause problems for F250 owners is the fuel pump wiring. Thanks to its rugged "bulletproof motor" and stylish exterior, these trucks remain a fan favorite even today. Here is a guide to help you check the wiring and the engine/fuel pump wiring diagrams below. The 1986 Ford F250 was the last of the beloved 7th-generation pickups to roll off the assembly line. ![]()
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