Thundermax and low fuel
Thread Starter
|
Tourer
Joined: Aug 2011
Posts: 401
Likes: 22
From: Lebanon, Pa
Thundermax and low fuel
I had to pull my battery to hook up my Ward cooling fans. When I hooked everything back up the Tach/speedo combo shows low fuel and has no fuel level at all.
How do I reset this to get my fuel gauge and my distance to empty working?
How do I reset this to get my fuel gauge and my distance to empty working?
Road Warrior
Joined: Oct 2008
Posts: 1,692
Likes: 22
From: Denham Springs, La
What kind/year bike you got? My crystal ball is cloudy. I would cycle the ignition switch a few times and see if that resets the gauges. Is anything else wacky? Did you check fuses?
On my 09 UC, if I disconnect the battery my "miles remaining", or my trip meter readout does something screwy like that.
On my 09 UC, if I disconnect the battery my "miles remaining", or my trip meter readout does something screwy like that.
Outstanding HDF Member
Joined: Jul 2007
Posts: 2,241
Likes: 7
From: Daytona, Fla.
Did you reinitialize your Thundermax? It's in the instructions, & you should have the warning posted on/near your battery.
Cruiser
Joined: Jun 2007
Posts: 189
Likes: 1
From: Alberta Canada
Fire it up and see how she idles.....I had a similar problem and being that I forgot to PULL THE ECM FUSE prior to disconnecting the battery, the Thundermax got really messed up. My ride would barely idle, under a load it would backfire so I knew it was bad....I wound up having to treat the tuner as if it were a new install, and reprogramed from scratch. Needless to say I pull the darn fuse now before doing anything with the battery or the master fuse.
Trending Topics
Road Master
Joined: Jan 2011
Posts: 781
Likes: 1
From: central, ohio
My digital read out went whack when my battery ran low when my voltage regulator took a crap. The dyno tech ended up having to reconnect the original brain again to recycle the speedo. Put the thundermax in and everything was fine.
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
10 Worst Harley-Davidson Motorcycles Ever
Pouria Savadkouei
Killer Custom's Jail Break Is The Breakout That Refused to Blend In
Verdad Gallardo
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Verdad Gallardo
Harley-Davidson Reveals Super Cool Cafe Racer Concept
Verdad Gallardo
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Verdad Gallardo
10 Motorcycles You Should Never Buy
Joe Kucinski
10 Things Harley-Davidson Needs to Fix in 2026
Verdad Gallardo
Southpaw Super Glide: A Left-Hand-Drive 1979 Harley FXE Built to Fit the Rider
Verdad Gallardo
