hello everyone -

I have a Honda Civic 2000 EX Coupe. My brake lights are not working and I want to check the "Under Dash" fuses. However, according to the fuse diagram, nothing is labeled "brake lights." Which fuse controls the brake lights? Thanks in advance.

Chris

 

Check the underhood fuse box. Horn working?

 

Yes - horn is working.

 

Check tail lamps fuse, fuse box under dash, driver side. Should br 10A.

 

Brake light fuse is the under-hood Fuse No. 52 (15A). Since the horns and brake light share the same under-hood fuse, if the horns work, then it wouldn't be related to the fuse.

Issue may be power or ground related. You'll need a voltmeter/multi-meter. Check if power is getting to the brake switch on the White/Grn (white wire with green stripe) wire. If there is power on the Wht/Grn wire at the brake switch; with the brake switch depressed, check if power is going through the brake switch to the Grn/White wire (green wire with white stripe). You may need to backprobe the brake switch Grn/White wire to check voltage.

Backprobing is either using a backprobe set or using a thin needle or something and making contact with the metal terminal of the connector without piercing the wire in the back of the still connected connector. Care must be taken to ensure that the wiring does not get damaged. You can use something like a T pin, available at Walmart, etc., and backprobe.

 

Thanks everyone for your help.

Horn works, so it's not the fuse. Will follow your suggestions. Thanks again!

 

Always check the bulbs first. Always. There have been a lot of cars with ALL the brake light bulbs simply burnt out.

 

Brake lights are 1157, dual filament bulbs. In other words, if you turn on your parking lights, they will turn on/light up. When you step on the brake pedal, the other filament is designed to light up to make it brighter. If it doesn't, you have BAD BULBS.

 

Fuse 52 underhood, right side of engine bay is for brake lights. Power then goes to brake light switch on the pedal, then to a connector, then to tail lights. Check bulbs first, use a test light / volt meter or power probe. If you have proper power when hitting brake switch, you need new bulbs. If nothing, I'd start with the fuse and the brake switch.