03 Tacoma V6 SR5 Ext Bed Running lights & dash lights are out

03 Tacoma V6 SR5 Ext Bed Running lights, dash lights ajs license plate lights are out (could be corrosion there).

I initially had a wiring issue it was causing the heater and dash lights not to work so I removed wiring and it worked.
The wiring was aftermarket.
I had led interior exterior and added reverse lights for more lighting in reverse.
(I eliminated most of these wires) while I was at it.

Maybe I cut a wire running from one rear running light to the other.

I changed a blown fuse, maybe a relay, not sure how to test the relay in engine compartment called tail light but I'm thinking it's a wiring issue

 

Since your dash lights are also not working i would look into where you worked on them before.

The main problem is most likely in the dash area some place

Check your fuse has not opened again.

 

Ok. There was one blown, maybe meaning a short, I heard there might be more fuses behind stereo or glove box I know I removed aftermarket wiring but I think I would've known if a wire was stock, I questioned one in rear going from one tail light to the other but the blinkers work so couldn't be a removed wire... (rear blinkers work but not front) will look again today..
Cold garage but beats outside