FOG LIGHT INDICATOR

I don't remember which Toyota model it was for, but I recently found fog light installation instructions that showed attaching wires in the fog light kit to pins on the back of the instrument cluster to enable the fog light indicator in the cluster. I don't remember if I saved the document or a link to it but I will look for it when I get on my PC at home.

I found the instructions while searching for a way to enable an indicator in the cluster for a rear fog light I installed on our Prius v. On closer inspection with a flashlight, I found that the instrument cluster for the U.S. specification Prius v does not have a rear fog light indicator - only a blank space where the rear fog light indicator is located in the cluster of the EU spec Prius+.

I was surprised that the instructions I found showed pulling the cluster to enable the front fog light indicator - seems like a lot of trouble.

Most Toyota and aftermarket front fog light kits come with a dash mounted switch that has a pilot light that lights up when the fog lights are on. I ended up using a front fog light switch like that for the rear fog light on our Prius v.

If a fog light switch with a build-in indicator light isn't being used, it should be easy enough to wire a separate pilot light into the fog light circuit and perhaps install it in a switch blank if one if available. I would have done that in our Prius v but the switch I used for the rear fog light fit into the last unused switch location. I found a variety of small inexpensive 12V pilot lights that would work well for this type of application on eBay or Amazon.

 

I don't remember if this was the information I found a few weeks ago, but here is a thread on a Toyota FJ Cruiser forum about installing an LED in the instrument cluster that lights up when front fog lights are on: FOG LIGHT INDICATOR LIGHT IN DASH: Inst. w/pics - Toyota FJ Cruiser Forum

The same concept might work on a Prius except it might be a little easier since there "should" already be an LED for front fog lights in the instrument cluster. Of course it would be better to find wires leading to the fog light indicator in the cluster and use those - maybe pulling the cluster and tracing the fog light indicator circuit might lead to the wires.