Nothing When Ignition Switch is On
To summarize the situation: The battery is new and putting out 13.06 v. The bike doesn't connect when the ignition is turned on. No dash lights, no instruments active, no head, running, or taillights. There is 13.06 v at the hot side of the main fuse and the fuse is good, as are all the other fuses. The maintainer lead hot side is 13.06 v if grounded to the bike with the ignition on or off, but reduces to 3.26 v if the maintainer lead ground side is used. The security antenna connection is around 9 volts on the hot side, but it is also 9 v on the ground side. If the maintainer is hooked up with the ignition in the on position, the dash lights will flash intermittently and the cooling relay clicks intermittently. The fob has a new battery that is 2.9 v. The bike also has a security alarm on it, which hasn't been activated by any of this.
I would really like to know if this is the BCM before I spend $500 on a new one, as I am sure once purchased it is mine, no return. Are there other checks that can be performed on the BCM?
I would really like to know if this is the BCM before I spend $500 on a new one, as I am sure once purchased it is mine, no return. Are there other checks that can be performed on the BCM?
Seasoned HDF Member
Joined: May 2008
Posts: 21,129
Likes: 12,691
From: South Carolina
I would disconnect the ground wire connections at the frame, clean and reinstall (more cheap easy stuff).
Have you pulled the Battery Power connector at the BCM and checked voltage at the connector?
Any chance the ignition switch connector is unplugged?
Last edited by Dan89FLSTC; Aug 8, 2024 at 10:42 AM.
No, but I checked both sides with a grounded test light.
That is kind of what I was thinking. When I get home I will check the wiring diagram to see how that is connected. The battery is making a good ground, there is no difference if I ground to the battery ground or the bike. If the maintainer is running through the BCM, then I would suspect there may be a problem there. I also think the black wire side of the security antenna shouldn't be hot. That comes from the BCM and returns to the BCM. I would believe the black wire should be dead.
Stellar HDF Member
Joined: Aug 2020
Posts: 3,175
Likes: 2,221
From: College Station, TX
There have been several report of bad connections on the main fuse that were intermentent. I don't recall if it was the connector the fuse goes into, or the wire at the connector.
Based on Dan's suggestion of pulling the fuse, have you tried wiggling the fuse while check the voltage? And tyhe same for the wiring to the fuse connector.
Paul
Based on Dan's suggestion of pulling the fuse, have you tried wiggling the fuse while check the voltage? And tyhe same for the wiring to the fuse connector.
Paul
There have been several report of bad connections on the main fuse that were intermentent. I don't recall if it was the connector the fuse goes into, or the wire at the connector.
Based on Dan's suggestion of pulling the fuse, have you tried wiggling the fuse while check the voltage? And tyhe same for the wiring to the fuse connector.
Paul
Based on Dan's suggestion of pulling the fuse, have you tried wiggling the fuse while check the voltage? And tyhe same for the wiring to the fuse connector.
Paul
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Road Warrior
Joined: Apr 2022
Posts: 1,514
Likes: 1,823
From: Omaha
These bikes have multiple grounds, not just battery ground. You need to verify everyone of them, make sure they are clean and/or connected. Did you forget a plug or wire somewhere when putting it back together?
I would disconnect the ground wire connections at the frame, clean and reinstall (more cheap easy stuff).
Have you pulled the Battery Power connector at the BCM and checked voltage at the connector?
Have you pulled the Battery Power connector at the BCM and checked voltage at the connector?
Any chance the ignition switch connector is unplugged?