harley code b1005

Harley Code B1005 – Fuel Sending Unit Wiring Woes

Hey there, Harley riders. Today, we’re going to dig into that pesky Harley code B1005 that’s been bugging some of you. We’ve got some insider info, and we’re going to break it down for you MotoSquids style. So, buckle up and let’s get this show on the road.

Harley Code B1005 – What Is It?

First off, let’s get one thing straight: if you’re dealing with a sputtering issue, this article isn’t about that. We’re focusing on the B1005 Diagnostic Trouble Code (DTC) and its relation to the fuel sending unit wiring.

Here’s the lowdown: B1005 is triggered when the fuel level rheostat (a.k.a. the fuel sending unit) detects an empty tank reading higher than the 260-ohm limit for over 15 seconds. But don’t get too fixated on the 260 limit, because rheostats aren’t that precise. If you see a reading above 300, it’s time to investigate further.

Fuel Sending Unit Wiring – The Nitty-Gritty

Now that we know what Harley code B1005 is, let’s talk about the fuel sending unit wiring. There are two wires going to the fuel level rheostat: a black wire and a yellow/white wire. You can use an ohm meter to check the resistance across these two wires while moving the float level up and down. Keep an eye out for any open spots where the meter reads over 260 ohms.

To give you a better idea, a full tank reading should fall between 39.5 and 27.5 ohms, while an empty tank reading should be between 260 and 240 ohms.

Troubleshooting the Code

Before you go into full panic mode, try clearing the code first. If it comes back, then you know you have a problem to address. Did you happen to turn on the ignition when the sending unit was removed? If so, that could be the reason B1005 was set.

Case Study: Handlebar Mod and Harley Code B1005

One rider experienced the B1005 code after running electrical wires through their handlebars. The bike was running fine before and after the mod, so they were puzzled. The solution? Simply reset the code and see if it pops up again. If you turned the ignition on while the harness was disconnected, the code would set. Just clear the code, and you’re good to go.

When the Fuel Gauge Goes Haywire

Imagine this: you’re out for a ride, and your bike’s fuel gauge shows empty. You stop to fill up, turn on the ignition switch, and the fuel gauge displays full. But once you start the bike, the gauge drops from full to empty, and the gas light comes on. You check the diagnostics, and there it is – Harley code B1005.

The Broken Wire and the Fuel Sending Unit

In this situation, it’s likely that a broken wire is causing the issue. One rider discovered a gray wire that had pulled apart during their handlebar mod. They used a butt connector to re-attach the ends, but the fuel gauge issue persisted. The culprit? Some broken wires hidden beneath the insulation.

The Waterlogged Fuel Sending Unit Plug

Another possible reason for the Harley code B1005 is a waterlogged fuel sending unit plug. One rider discovered this issue after washing and polishing their tank. Water had seeped into the female side of the plug, leading to corrosion. A quick clean

with some electrical contact cleaner and a blast of compressed air was all it took to get things back to normal.

Maintenance Tip: Dielectric Grease

To avoid future issues like water-induced corrosion, apply dielectric grease to the fuel sending unit plug. This will keep moisture at bay and ensure a smooth connection.

The Bottom Line: Harley Code B1005

At the end of the day, Harley code B1005 is a pesky little problem that can be caused by a variety of factors. From wiring issues to waterlogged plugs, this code can pop up when you least expect it. But now that you’re armed with knowledge, you can tackle this problem like a pro.

Remember, always try clearing the code first. If it returns, then it’s time to investigate further. Check the fuel sending unit wiring, look for broken wires, and make sure your plugs are moisture-free. With a little bit of patience and some cold beer, you’ll have your Harley running smoothly in no time.

Now go forth and ride like the wind, my friends.

FAQs

Below are some frequently asked questions about the Harley code B1005:

What does Harley code B1005 mean?

Harley code B1005 is a Diagnostic Trouble Code (DTC) related to the fuel sending unit wiring. It’s triggered when the fuel level rheostat detects an empty tank reading higher than the 260-ohm limit for over 15 seconds.

How can I check if I have a problem with my fuel sending unit wiring?

You can use an ohm meter to check the resistance across the black and yellow/white wires connected to the fuel level rheostat while moving the float level up and down. Watch for any open spots where the meter reads over 260 ohms.

Can I clear the Harley code B1005 on my own?

Yes, you can try clearing the code yourself. If it comes back, then it’s time to investigate further and address the issue.

How do I know if my fuel sending unit rheostat is working correctly?

A full tank reading should fall between 39.5 and 27.5 ohms, while an empty tank reading should be between 260 and 240 ohms. If the readings are outside of these ranges or if the code reappears after clearing it, then there might be an issue with the fuel sending unit rheostat.

Could a broken wire cause the B1005 code?

Yes, a broken wire, poor connector contact, or even a poor ground can cause the B1005 code. Inspect the wiring and connectors for any damage or corrosion, and repair or replace as needed.

Can a waterlogged fuel sending unit plug cause the B1005 code?

Yes, water getting into the fuel sending unit plug can lead to corrosion and cause the B1005 code. Clean the plug with electrical contact cleaner and dry it out with compressed air to fix the issue.

How can I prevent future issues with the fuel sending unit plug?

To avoid future problems with the fuel sending unit plug, apply dielectric grease to the plug. This will help keep moisture out and ensure a smooth connection.

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