I have a 2017 Dyna Fat Bob.
It has a massive parasitic draw, over 12 volts. I pulled fuses and connections to try to find the draw with no luck. I noticed corrosion on the positive starter terminal so I cleaned this. I also took the solenoid apart and cleaned in there. Now it is down to 9 volts. So I am guessing my starter is the culprit and the starter needs to be replaced? Any suggestions?

 

Parasitic draw is measured in milli-amps or micro-amps not volts.

How are you making the measurement?

To measure correctly requires one terminal to be removed from the battery and an ammeter placed in circuit.

Testing for Parasitic Draw with a Multimeter | Test Meter Pro

 

Yes that is what I am doing. I am in the Volts setting on my multimeter

 

Which is not going to get you the correct measurement. Change meter to amps setting.

 

I have no reading in my amps setting. Not even if I touch the positive and negative posts. I need to learn a bit more about my multimeter LOL

 

When measuring amps it is normal to start on highest range and then go down. I am old school referring to how the analogue meters were used.

Some meters have fuses and if you try to measure 3Amps with the milliamp range it might damage the meter.

Yeah find the instructions for the meter.

The thing is with all the fuses out you might well not see any current draw.

 

Tell us why you think the bike has a "massive" parasitic draw?

What is the bike doing?

 

I’m a Ford tech, but it’s all the same. Done a million of these draw issues. Put all your fuses back in. Get a digital multi meter with an “amperage “ feature. You don’t need one that reads “milliamps” as you’ll just convert the reading with decimal point movement. Disconnect the negative term of your battery. Clip the positive lead of the meter to the neg. cable. Clip the negative lead to the battery post. Attach a wire with 2 alligator clips to the same connections u made with the meter. Let the bike sit for 30 minutes. Turn the meter on, now disconnect the alligator clip wire. This needs to be done so you don’t wake up the modules as they have a Keep Alive Memory and a working state. See what the meter reads. In the auto industry 50mA is acceptable. Anything over is considered a draw. 50 mA will show as .05A, 35 mA will read as .035A etc. If you show a draw, pull 1 fuse at a time while monitoring the meter. If it drops under 50mA, find the circuit and components that fuse protects and make the repair.

 

I had a strange one like this a few years ago, Battery kept going flat over night.

Whart it ended up being was some condensation in the data port (FP3 connected)