2012 Fog relay

[Absolutely Red 12]

Originally Posted by CTScott

There is none on the 2012. The fog light relay is built into the body ECU.

To see if it is enabled on your car, you can jump pin 3 to pin 4 on the headlight switch connector D106. Pin 3 will be brown or green (depending on if you have the OEM alarm) and Pin 4 will be green.

Jump those wires and have the ignition on and the headlight switch in the low beam position. If the fogs don't light then the relay is not in there. For the 2nd gens for instance the integrated relay for the power windows and locks is not present on cars that were not built with them (and there are different part number for the body ECU).



Attachment 48579

CTScott

Thank you, I was getting that impression from reading the Prius C forums.

The fog harness behind the bumper is already there, as is the fog fuse.

I do not have the OEM alarm, so brown to green?
What wire is the parking light, if I cheese to not use low beam?
Is the illustration pin side, or wire side?


Again, thank you!

[CTScott]

Originally Posted by Absolutely Red 12

CTScott

Thank you, I was getting that impression from reading the Prius C forums.

The fog harness behind the bumper is already there, as is the fog fuse.

I do not have the OEM alarm, so brown to green?
What wire is the parking light, if I cheese to not use low beam?
Is the illustration pin side, or wire side?


Again, thank you!

If you have the alarm or DRLs - Green to brown.
If you have neither alarm nor DRLs - Green to Green.


The connector illustration is looking at the pin side of the connector.


For the parking light turn on, it is a bit more complicated for the 2012, as for the ones with DRLs, that functionality is built into the body ECU, so it will be completely different for DRL vs. non-DRL Yaris. I would start with seeing if it works at all on a non-factory equipped car.

[Absolutely Red 12]

Originally Posted by CTScott

If you have the alarm or DRLs - Green to brown.
If you have neither alarm nor DRLs - Green to Green.


The connector illustration is looking at the pin side of the connector.


For the parking light turn on, it is a bit more complicated for the 2012, as for the ones with DRLs, that functionality is built into the body ECU, so it will be completely different for DRL vs. non-DRL Yaris. I would start with seeing if it works at all on a non-factory equipped car.

Got it, will let you know tonight.

Thanks again!