J.A.'s Toyota 4Runner Highlander
Highlander Infomation, 4Runner History, Pictures, Modifications, Trail Rides, Technical Specifications, Standard & Optional Equipment, Extensive Friends Section, Related Links, 4Runner Topsites and more...
Main Menu
 My Custom PC Build
My 2007 4Runner
 Standard Equip.
 Optional Equip.
 Technical Specs.
 Purchasing Info
 Cargo Net
 First Aid Kit
 Floor Liners
 Limited Grill
 Storage Bin Pads
 Fire Extinguisher
 Cargo Organizer
 Key Reminder Disable
 Fulltime 12v Power
 Fulltime 115v Power
 Fog Light Mod
 Map Light Mod
 DRL Mod
 Led Interior 5k
 Led Interior 6k
 Led Exterior
 Led Switchbacks
 Footwell Lighting
 HID Lighting
 DVD Headrests
 Nav Info & Map Updates
 Nav Override
 Nav Video
 Anytime Camera Mod
 Blind Spot Monitor
 Suspension Lift
 Adjustable End Links
 Air Lift
 On Board Air
 Tires: Revos
 Tires: Duratracs
 Wheel Spacers
 HCF Delete
 Skid Plate Bolts
 Brake Fluid Flush
My 1999 4Runner
 Standard Equip.
 Optional Equip.
 Technical Specs.
 Highlander Info
 Trail Rides
 Top Tether Bracket
 Cargo Organizer
 Flare Edge Trim
 Fog Light Mod
 Fulltime 12v Power
 Air Filter
 Deckplate Mod
 MAF Cleaning
 TB Clean / Gasket Mod
 Extended Diff Breather
 Tires: Revos
 Tires: Cooper AT3
 Sway Bars
 Poly Bushings
 Synthetic Fluids
 Brake Fluid Flush
4Runner History
 1st Gen 1984-1989
 2nd Gen 1990-1995
 3rd Gen 1996-2002
 4th Gen 2003-2009
 5th Gen 2010-2020
 6th Gen 2021-203?
 4Runner Topsites
 4Runner Friends
 Related Links
 My 1984 Cutlass
Independent use of Fog Light Mod:

Fog Lamp Circuit Schematic
Factory Fog Lamp Re-Wire Mod
The factory fog lamps are wired to illuminate only if the headlamps are on. They also shut off when the high beams are activated. I prefer to have the ability to switch on the fogs when only the parking lamps are on and I like them to stay on while the high beams are activated.
To accomplish this, remove the fog light relay located in the engine compartment fuse panel and bend its top prong so that it no longer inserts into its usual location. That was where it was getting power from the headlamps. Take a short piece of 14 gague wire and crimp on a female quick disconnecting terminal with a 0.187 inch tab. Do not try to use a standard 0.250 inch tab disconnect because it will not fit tightly enough. Connect the disconnect to the top prong of the fog light relay (the one you just bent). Run the other end of the wire to the left side of the 10amp taillamp fuse. Now power is available to the fogs when the parking lamps are on and they do not stop receiving power when the high beams are switched on.



Fuse Panel
Please Note:
This mod, when performed on 2000+ model year 4Runners, has no change at all in the operation of the fog lamps. The 2000+ Runners come standard with daytime running lights (DRL's) and Toyota has prevented the possibility of operation of the fog lamps during the time DRL's are on.

Update for 2001-2002 4Runners:
Chuck Konarske, a 2002 Sport Edition 4Runner Owner, has came up with a solution for 2000+ models years.
He writes...
"After doing your mod, owners of the 2001-02 model year trucks need to locate the green and black wire in pin #16 of the connector to the DRL relay, relay D8. It's located just to the right of the steering column, down near the driver's right shin. This wire needs to be cut a couple of inches away from the connector, extended and grounded to a convenient point. I use the lower bolt of the driver's side fuse box as an easy-to-reach ground. Tape off the piece toward the connector and you're all done. It's easy enough to do without diagrams as long as continuity is checked between pin 16, in the D8 connector, and the number 2 coil connector in the fog lamp relay socket, with the fog switch on. Turning it on and off will drop continuity, proving you have the right wire."
Here is the 2002 Fog Lamp Circuit Schematic Chuck sent to me.
Update for year 2000 4Runners:
R.C., a 2000 Limited 4Runner Owner, wrote to me of his experiences with the Fog Light Mod...
"The pin # you reference for the D8 connector from the DRL relay is different. It is pin #14 not #16. The color is still Green with a Black Stripe. Besides that the mod worked great. I checked continuity between pin #14 and the #2 coil connector in the foglight relay before completing the mod. I also decided to install a switch in my DRL's. It was pin #2 in the D8 connector, Black with a Yellow stripe."

[an error occurred while processing this directive]
  Toyota 4Runner Topsites

This Page Last Modified: April 28, 2018.
Website created and maintained by Webmaster J.A. using Notepad
Copyright © 1999-2023 JAS Enterprises, All rights reserved.
You are the visitor to this website.