08 FLHTCU ABS, Alarm
Ride 45 minutes highway, No problem. Drop off to surface street and I lose everything connected to the top row of fuses.
Accessory, Radio power, Brake lights, Cruse control, the indicator lamps on the dash switches.
Have had ABS power failure from this problem but nor every time, however last time the rear pedal went to the floor the next morning, but came back later after I tried to bleed the brakes. That bothered me big time. The code cleared and it has happened twice with no code.
Discovered that if I turn the ignition off and back on All comes back.
Cleaned all fuse contacts and used dialectric grease on fuses to control corrosion to no affect.
Losing my mind over this one.

I hate elctrical issues. I would get an electrical manual to your bike if'n I were you. I would check the ground to the fuse box. I have never had to mess with the fuse box, but if it is the whole top row it does suggest the issue is related to that particular ground. I don't know how they have it setup so that is just a WAG.

Thanks for the advise. i have seriously been considering the electrical manual.
Cannot stand the thought of someone else working on my bike. Especially at $90 / hr.
Funny thing, Rode to work this morning and it didn't do it.
Possibly temperature related.
In the evening it is 80's this morning it is 50's.
Hmmmm. I will get to the bottom of this.

I once had a similar problem and it was related to a compromised wire harness(older bike,was 10 years old). What you may want to thik about i as long as you can locate a conscientious MOCO mechanic you're better off as they have the training and the correct diagnostic equipment. Everythng is plug and play now. What might take you hours and hours and days and days to locate,will take them a fraction of the time. Sure they are 90$ and its expensive because its worth it. Less time working on the bike means more time riding it. Ain't no shame in taking your bike to a mechanic. You need to get over that and the sooner the better.

I agree with kickstand it could be as simple as just cleaning and tightening a ground wire. I would check the wires going to the box like he suggested.

Thanks for all the great recommendations. I was thinking about grounds myself. Did not know the fuse rows were grounded seperately.
Weirdest thing. Got on it today and blasted for 20 min at 72 mph with no problem. beautiful 85 deg day.
Got into traffic at the Astrodome and everytime I hit the brakes I lost the radio and the switch lights, turn sig and brake lights.
It would come back as soon as I let the brake g until it went out for good.
Pulled over, turned the key off and back on and all was welland never did it again for the 45 min ride home.
I think ground is the first place I need to look.

Now, I guess the thing about the mechanic is that I am just that way, had some bad experiences and no one will do as good a job on my machine as I will. Just the anal perfectionist in me, but thanks for the advise.

i will let everyone know what I find and all suggestions are welcome.

It may not be grounded seperate, that was a wild ass guess on my part.



Does your brake light work? Do you have any modules on your brake like or anything not OEM? A short can make wierd stuff happen. The wiring harness as BI63 mentioned could be the issue. When you hit the brakes the other stuff acts up, the wires related to those things could be in the same harness and rubbed bare in one spot. I would try to trace the wires from the fuse box and see what I found.


I feel the same way.

For me its if I got money someone else can work on it. If I don't have money I work on it. Right now for the moment I have money.

Harleys are expensive because they're worth it.

Hey Kickstand, question. B163, I assume this is the harness that goes through the rar fender from the connector under the seat.
If so, I have inspected every inch of every wire and every connector from under the tank to the back of the fuse blocks to the tail light.
All the connectoes look good as well as all the pins.
There was a tiny flake of oxidation on one of the pins in the connector for the rear fender harness, cleaned and reconnected.
Cleaned both sides of the fuse block as well as the ABS connector.
Gonna put it all back together and go for a ride before I go any further cus the next stop is the front end. Never had the fairing off.

CT..my issue was the bulk of the harness that runs under the seat and between the seat and tank, there was a short from the rubber sheath being rubbed off exposing wire.