I have a 2005 Night Train FSXTBI and after the speedometer gets to 25 MPH the check engine light comes on, the security light comes on, and the speedometer back light goes out. Any suggestions?

SOURCE: check engine light acting up

The first thing I would check is the voltage output from the charging system. If the regulator isn’t regulating, the voltage will keep climbing as the engine speed increases. The electronics in the speedometer don’t work well at these high voltages. This would also explain the bright marker lamps. You should be able to see this with a simple voltmeter across the battery terminals.

SOURCE: Battery drained while riding

chek your connection where the alternator plugs into your engine casing & spray it with electrical contact cleaner

SOURCE: 2001 XL1200S Cuts out and dies at highway speeds for a moment

If it was stored with fuel in the tank:

1. The fuel filter should be replaced
2. You may to replace the fuel delivery system coming out of the tank
3. Remove the plug in the carb and reset the idel mixture

I just bought one store for 6 years - my issue is the bike will n ot idel but runs on the road like a bat out hell.

Gar

• 384 Answers
• Posted on Aug 12, 2009

SOURCE: when I ride my 2000 fatboy my speedometer doesn't

Try inside the tach on the connector. But also remove your speed sensor on the transmission and clean it. They pick up metal chips from the trans and short out. Also, HD had a bunch of bad speedos around your year. They replaced them for free. Doubtful they will replace yours at this late date. You might end up buying a new speedo.

SOURCE: 2004 harley night train. speedometer works once in

unplug your voltage regulator. If the speedometer works while the voltage regulator is unplugged, your regulator is bab.