How do i make my headlights work

Check the main fuse.

https://www.google.com/search?q=1985+honda+big+red+250es+main+fuse

..

Sounds like a short or one of main sensors is burned out.. Mite get a voltage meter and see if your getting
Power or not. Go to google Image and get the schematics of the main wiring
Systems and go threw it piece by piece.
Or you mite just have a main fuse blown. Get the schematics and check
Each system good luck.

check fuse

Fisrt see if battery is got life in it. Test it with volt meter, if it's got nothing try another battery. If batt OK Check your fuses? Then check other wiring connections.

Good luck

Jeff, Recheck fuses/relays, probe dash wire to see if you are getting power up to dash, if not then fuse or wire broke. If you are getting power into dash then display is faulty and needs repaired or replaced. Check the attached links,Manuals and guides, Good luck with your Bike
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How to Diagnose Motorcycle Electrical Problems Dennis Kirk Inc
ATV TROUBLESHOOTING AND MAINTENANCE
Service Manuals for Download in PDF

If no bad fuses or relays, it has to be a plug or bad wire. take all plugs apart and reconnect.

-Battery has power...? But the line connect from battery to light
doesn't have power on the end that connect to the light...?
-If so the line is totally burn (Inside wire). Replace with new one.

Good luck

Mai

check fuse located by air breather,or wir loose coming out of switch on handle bars chech plug

Hi Brandon
Use a 12v multimeter or a test light to trace fault from headlamp backwards.
Probably check across each fuse first to see if you've blown one.
OR
Check one side of the Headlamp switch for voltage first.
No volts there means no power to headlamp. then trace back.

Like all electrical troubleshooting, it's a process of elimination.
Take a piece of paper and draw a headlamp circuit.
Battery, Fuse, Switch, various connectors, and Headlight.
Use that to guide your tracing.
Good Luck
Trevor

try jumping the solenoid. it might be bad.