2015 Softail deluxe no power to starter and no spark

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Nov 26, 2025 | 08:21 AM

#11

hattitude

Seasoned HDF Member

Joined: Sep 2008

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From: San Diego, CA

Quote:

Originally Posted by robd32

Okay, I have another question for you.Can I get a b?C?M a e c m from a whole different bike and just plug and play to the one I have.If there's a fault with it

If they are from the the same bike, and were working together when you took them out, they should be plug & play... But if it's a security BCM, you will need the FOB too.

With the canbus systems, all systems talk to one & other, I believe the only issue with a swap above that you mention, would be the speedometer...

Since the speedo has the odometer, which shows the mileage that's stored in the ECM or BCM, if the speedo is not matched to the BCM/ECM combo, it may show "VIN ER" or something like that in the odometer window, which means a VIN Error. The speedo needs to be matched to the BCM for proper mileage display.

I am not sure about what can be done for the Speedo, BCM, & ECM relationship with the diagnostic tools. I'd have to dive into the electrical diagnostic manual for your year/model to know for sure. The dealer or someone on this forum may know the answer to that...

Nov 26, 2025 | 10:13 PM

#12

robd32

Thread Starter

6th Gear

Joined: Dec 2024

Posts: 13

Likes: 4

ThNk you so I guess im on the hunt for a hole set up

Dec 1, 2025 | 10:56 AM

#13

razorbacksrule

Road Warrior

Joined: Aug 2009

Posts: 1,317

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From: Ft Smith Arkansas

Pin

Can you put a Pin number in to bypass the fob ? If so ask the previous owner if he knows what it is .

Dec 9, 2025 | 11:43 PM

#14

robd32

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6th Gear

Joined: Dec 2024

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Hay man I wanted to tell you thank you for the info I ended up getting a bmc and ecm that was all ready married solved the problem now just picked up a new coil and plug wires to fix the now spark issue see how it fires up tonight

Dec 11, 2025 | 05:24 PM

#15

robd32

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6th Gear

Joined: Dec 2024

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So I got another problem.I have no spark, I replaced the coil change.The wires I did relocate the coil to a different location.I don't know if that makes a difference.I'm only getting nine volts to the coil plug that plugs into the coil.If you have any ideas or any thoughts be very appreciative.Thank you

Dec 11, 2025 | 06:28 PM

#16

hattitude

Seasoned HDF Member

Joined: Sep 2008

Posts: 14,113

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From: San Diego, CA

Quote:

Originally Posted by robd32

You keep changing things...

I've offered possible causes to your issues, but I have not read where you have confirmed any of my suggestions as your issue. You seem to just throw different parts at the problem to see what happens..

This is the first I remember reading you have changed the coil location and wiring.. I have read of some issues recently where coil relocation kits have caused problems.

Have you used a combo, such as OEM coil in OEM location w/OEM wiring, mated with a BCM & ECM that has worked?

If you keep throwing parts and changes at an issue, instead of diagnosing the actual problem you have, you could eventually get lucky... but it could take a lot of time and $$$$ before you guess correctly.

Right now I'm a little confused as to what steps you have done to diagnose the issues you have been having, other than throwing different parts into the mix. I can't offer any more suggestions, because I don't know what you have tested, found, or confirmed about your issues.....

Last edited by hattitude; Dec 11, 2025 at 06:34 PM.

Dec 11, 2025 | 09:53 PM

#17

robd32

Thread Starter

6th Gear

Joined: Dec 2024

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Okay, let me give you.Ithe updates thought I told you what happened i got ABC M&A EC. M.Both linked together from the same bike running bike from a shop. I put those on the bike, fix the problem with the starter. I could hit the button now and it'll crank.So that's good. You're right about that one.The ECM and the BCM they don't need a key fob. The one that I got guess it wasn't the secured bcm like you stated on mine original one. The coil I don't have extension kit or none of that. I mounted it down in the front bottom on a bracket, I made behind the reservoir for the brakes.I didn't cut the wires extend the wires. None of that still original harness.But I'm only getting like 9 V through the coil.And when I check the ohms, I was getting like 6 on 1 side and like 3 and a 1 on the other side. So I got a new coil and wires.I'm still only getting nine volts to the coil.Like nine point four and no spark

Dec 12, 2025 | 08:39 AM

#18

hattitude

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Joined: Sep 2008

Posts: 14,113

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From: San Diego, CA

Thanks for the update. I get it now.

You got a new coil and wires, moved the coil but are still using the OEM wiring harness.

As far as the coil issue goes, others smarter than I will have to jump in here.... I can follow an electrical diagnostic manual through tests & checks, but am not well versed about electrical stuff.

What I think I know about the coil, without having the correct electrical manual in front of me is:

The primary and secondary windings have different ohm readings. IIRC, the primary is a low reading about .3 to .5 Ohm while the secondary windings are a high reading, 5.5K to 7.5K Ohm. There is a difference between engine models and ignition types. So check your specific year/model service or electrical manual.

The ECM sends a low voltage trigger signal to the coil, while the coil should get a constant 12V power from the ignition circuit when the key is "On".

If I got the above wrong, hopefully someone will chime in with a correction.

Based on my weak memory, since you mention, "I'm still only getting nine volts to the coil. Like nine point four and no spark."

If you are measuring that 9V when the key is turned "on", you have an issue in your battery/ignition circuit. It should be 12V.

If you are measuring that 9V while cranking over the engine, it's normal to have a voltage drop during engine cranking. I just don't know if 9V at the coil during cranking is acceptable or not. If that drop to 9v at the coil while cranking is acceptable, then you would have an issue with your coil..

Again, I'm a little weak with my retained electrical knowledge. Hopefully someone else, wiser in the ways of the actual measurements you should have, will chime in...

Last edited by hattitude; Dec 12, 2025 at 08:41 AM.