Fried Switches

[CTScott]

Originally Posted by Golddeenoh

i'm not sure which "brain" is doing the thinking for the fog light, just that it is fickle.

None. There is just the switch, fog light relay, and if you have DRLs, the DRL relay is in circuit as well.

[UberSilver]

Originally Posted by Golddeenoh

well my fog lights work...when they want to. yesterday the came on in the morning but wouldn't that evening, today they turned on every time. seems almost as if the BCU is seeing a different parameter than I was aware I had given it or that it had read.

Does your Yaris have fog sensors?

[Golddeenoh]

this appears to have been the problem it wasn't making a good connection in it and kept wiggling lose. I also moved my ground to better location the other one was questionable. now to see if it keeps working or starts being fickle again.