Fan ON , This modification will turn on the electronic fan by a switch located in the cab. The relay of the fan is in the factory fuse box closest to the battery. We will need to remove the fuse box top to access the relay to complete this mod. You also have a choice between Hi or Low relay.
USING THE LO WILL GIVE YOU A CEL!!!
STEP 1
Locate your preferred location for mounting the switch. Choose a location that will be cheep to replace if you trade or sell the vehicle. Also look behind and around your mount location for obstructions, depth, metal and ease of running the wires. Personally i chose the gauge cluster bezel. These instructions will be based on this location.
Step 2
Remove the dash bezel by pulling forward. You might be able to wedge your finger between the clear plastic and the lower part of the bezel.
Drill the hole to accommodate your switch. Use a Step uni bit and be careful not to make the hole too large. Mount your switch and make sure you are not hitting anything while the bezel is mounted back on the cluster. Make your adjustments and then remove bezel again.
Step 3
Remove the knee guard below the steering wheel. From the top this will swing open on hinges located on the bottom. Take your wire, connect one female lead to the end of it. Then plug it into the switch. Run a separate wire about 2ft to a ground(PHOTO).The screw above the fuse box works well. You will use one fisheye/ring connector on one end and a female insulated connector on the other. Run your Ring to the screw and the female to your switch. You now have switched negative. Now Run your wire toward the grommet in the firewall, making sure to keep clear of steering column and sharp metal.(Zip tie were needed)
Step 4
Locate the empty rubber grommet(may be used on adjustable pedal). It is above the gas pedal and to the right of the steering column. Remove it and put an X slice/cut in it. You can just poke a hole but we have found the X seals better. Run your wire to through the grommet and replace the grommet. Now the majority of your wire will be in the engine compartment.
Step 5
Open the hood if not already open and locate the correct fuse box. The fuse box closest to the battery. There will be two black relays, fender side of the fuse box. The one toward the battery is the LO the one toward the firewall is the HI. Both are wired the same so you can turn on either one... BUT NOT BOTH!.
We Chose HI, Since the Low will give you a check engine light. Please note some of the photos depict the Lo side. This was our first choice till we noticed the CEL.
Step 6
Run your wire from the firewall to the fuse box. Keeping it free from moving parts, heat and hidden. You will run it to the engine side of the fuse box. You can run the wire along side of or in-between the two fuse boxes.
Step 7
Now remove the Hi Fan Relay. Turn it upside down and locate pin 85. You are going to rap about 1 1/2 inch of stripped wire around this post. Refer to the photo. Make sure you rap it and twist it so its secure and not touching the other posts on the relay. Once your done. Plug the relay back in.
Step 8
Run the wire inside the fuse box along the wall. Go flip your switch and the fan should turn on. Now your done. Make sure you zip tie all loose wires and loom or tape up the wire coming out of the fuse box to make it look stock. Clean up your mess and tools from under the hood, replace fuse cover and good luck.
KEEP IT COOL!
