I've a 94 Accord lx Auto, The speedometer main light are shut off, all the indicator lights and statrting lights comes on but the main light don't, so its tottally dark when I drive in the night. I've chaneged and checked the fuses, and the bulbs, but still no effect. I could see the current at the dimmer switch and the bulbs holder before, but that is gone too. Also my main speedometer is not working, I guess I ve to change the VSS sensor. Do u know if that also controls the lights.

Check/replace the Dash Lights Brightness Controller. Check connectors on Controller for corrosion. Use a test light or multimeter to test all fuses in the under-dash fuse/relay box. See section X below:

https://www.askmehelpdesk.com/cars-trucks/faq-how-troubleshoot-repair-maintain-honda-civics-46563.html

Ive checked all the fuses, and the dimmer/ brightner switch. What is connectors on Controller for corrosion?

Remove Dash Light Brightness Controller. Take abrassive cloth and clean the male and female contacts of oxidation.

Remove Dash Light Brightness Controller. Take abrassive cloth and clean the male and female contacts of oxidation.
Thanks