Anytime Fog Light Modification


      As much as I love my 2007 Tacoma (current model generation began in 2005), there are a few of those little things where one wonders what the Toyota Design Engineers were thinking.
 
      One such design "feature" of the Tacoma is that the owners of the ones equipped with fog lights will find they will only operate under certain circumstances.  In other words, the driver does not have full command over what conditions that the fog lights may be used.  Presumably, this is some type of benefit since Toyota decided there would only be one type of driving condition in which fog lights might be used.

      The other little irritation for me is that the fog light switch provided by Toyota is one of those press-once to activate and press-once-again to deactivate.  I found myself not being able to tell whether they were on or off especially during daylight hours.

      I scoured the Internet for a solution and came across a Anytime Fog Light Modification authored by Mouser Williams.  The instructions are well written overall and the document is well illustrated.

      I can imagine many circumstances that I may wish to turn on my fog lights at will and I know I want to be able to easily tell if they are on during daylight hours.  I followed Mouser's instructions and it works great.  There are some additional tips I'd like to add:

  1.       My read of the instructions did not make it clear that I was shopping for a Mini Add-A-Circuit.  I purchased a couple from an eBay auction and received standard (larger) size Add-A-Circuits.  Discovering the error, I went on a quest for Low Profile Mini Fuse Add-A-Circuits and exhausted myself to determine such things probably do not exist.  On a whim, I purchased a Mini Fuse Add-A-Circuit from Advance Auto Parts and it worked perfectly.



          NOTE:  Although the Toyota fuses are all "Low Profile" fuses, the fuses that you will use in the Add-A-Circuit are a more popular mini fuse that have longer legs to them.  The three fuses above are all 5 AMP fuses.  You will make life a lot easier for yourself if you learn the difference between mini fuses and low profile mini fuses.  If you do, the rest is pretty much a snap.
     
  2.       Get yourself an assortment supply of low profile mini and standard mini fuses.  The mini fuses are readily available, but it can be virtually impossible to find a supply of low profile mini fuses at the last minute.  The Anytime Fog Light Modification is one of many projects that can easily lead to a burned out fuse.  Once a fuse burns, you are cannot complete your project until it is replaced and it may take more than one fuse to figure out what error you have made.


     
  3.       There are two fuse boxes on the 2005+ Tacoma.  The one where the modification gets made is under the hood just behind the battery.  For a novice like me, this was important information. :)


     
  4.       I chose a slightly different wiring path than Mouser did.  The wire is a tad longer in my version, but the architecture of the components I route my wire past tend to help keep the wire down in place.  I noted that Mouser had a little concern about things popping out which led me to this path.  I also adjusted the legs of the Add-A-Circuit outward just a little so that the fit was just a little more snug when pressed into the socket.


     
  5.       After additional research, I found a recommendation that the Add-A-Circuit should be connected to the EFI #2 socket as shown above (instead of the dome light).  The EFI #2 socket is one that is disconnected when the ignition is turned off.  Thus, it is impossible to leave the fog light on accidentally after the engine is turned off.


     
  6.       A final difference I made from Mouser's installation is that I changed out the original Fog Light switch with the kind shown above.  I am under the impression that this style switch is from the earlier generation of Tacomas.  This style switch has a distinct on and off position and it has an indicator light to show when it is "on".  I purchased a number of them off of eBay and the Seller always seems to have a supply of them.

          To remove the original switch and get access to the wires, you must remove the two screws at the top of the dash and lift the dash around the gauges up and off  from around the steering column.  You will find that the old switch has four wires (two are used for dashboard dimming).  When connecting the new switch, ignore the striped wires and connect the remaining two to the top two posts of the rocker style switch.

          You will need to shave off a little of the dash of the holes for the switch to get the new one to fit properly, but the end result is a nice, snug, OEM look (as shown above).
     
          It took some experimentation to hook up the new switch.  The original switch had four wires hooked up to it.  The new switch has only three prongs.  I eventually determined that the blue wire should be routed to the top prong and the black/white wire gets connected to the middle prong.  The remaining two wires need to be taped off and are not used.

          When connected in this way, the switch will turn on the fogs work virtually anytime and the light on the switch is turned on when the fog lights are on.

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