Factory DIY AUX switches

[TimC.]

If you didn't get the AUX switches and want to go factory and make the pigtails for each switch here are the part numbers for the connectors, all 4 are different and the individual wire. You need 5 for each switch pin if you want to cover the pin count inside the switch. I do not have the switch part numbers in this photo. Those numbers are all different as well.

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[socotaco]

To add to TimC’s useful post:


Aux1 switch: part# 84485-AK010 (supersedes 84484-35010)
Switch terminal + wire: part# 82998-24290
Switch terminal connector: 90980-12C78

The switch is not inexpensive ~$84 + tax, and the connector will need to be wired correctly so at least 2 of the terminal wires will be needed, but it is possible.

The chart posted on a dealer site would indicate that any of the lower left control panel switches are available, Aux1 through 4, the fuel door release switch etc. The numbers on the diagram relate to part numbers that have been superseded, but someone in a Toyota parts center should be able to find the new numbers.

Makes me think about adding the locking fuel flap that TRD ORs and others don’t get, no doubt for cost saving reasons!

 

[TimC.]

Nice addition, I hope this helps someone. It was awful trying to dig all this out with a parts guy who had zero interest helping me.
Regarding the AUX switch pins (5) of them on the back side. Does anyone know which pins control the switch backlight and components you will power? I have this to do still yet.

 

[socotaco]

Tim, I don’t have access to wiring charts, someone on here might, so I would use a multimeter and battery to work out which lines are switched and which are to be powered. Good luck.

 

[daytonaviolet]

Tim, this is a very helpful post thanks . Do you know if all Tacoma models are pre-wired and fused ? Of the models pre-wired, do we know the fused limits ? Lastly where are the fused wires located in the truck ? I’m assuming they are somewhere behind bumper ?

 

[daytonaviolet]

I found this thread to be very helpful

https://www.tacoma4g.com/forum/thre...-aux-buttons-no-firewall-wiring-needed.10019/

 

[daytonaviolet]

Found this regarding aux switches in the manual

https://www.toyota.com/owners/warra...al/article/tacoma/2026/om04051u/ch05se040401/

 

[daytonaviolet]

I totally forgot I have these. It was with my owners manual in the garage storage cabinet. I believe they are the oem aux1-4 pigtails.

 

[FossilHunter]

To add to TimC’s useful post:


Aux1 switch: part# 84485-AK010 (supersedes 84484-35010)
Switch terminal + wire: part# 82998-24290
Switch terminal connector: 90980-12C78

The switch is not inexpensive ~$84 + tax, and the connector will need to be wired correctly so at least 2 of the terminal wires will be needed, but it is possible.

The chart posted on a dealer site would indicate that any of the lower left control panel switches are available, Aux1 through 4, the fuel door release switch etc. The numbers on the diagram relate to part numbers that have been superseded, but someone in a Toyota parts center should be able to find the new numbers.

Makes me think about adding the locking fuel flap that TRD ORs and others don’t get, no doubt for cost saving reasons!

If you ever do try for the factory locking gas cap let us know how it goes. Thats one feature I was disappointed I couldn't get and would love if I could add it in myself if possible.

 

[TimC.]

Tim, this is a very helpful post thanks . Do you know if all Tacoma models are pre-wired and fused ? Of the models pre-wired, do we know the fused limits ? Lastly where are the fused wires located in the truck ? I’m assuming they are somewhere behind bumper ?

My truck is not prewired for AUX switched. I looked behind the panel where prewired harness should be, but not to be. I will add a fuse block similar to an earlier thread posted. The picture you have here is what my panel will look like but I will be able to turn on, let's say the light bar, directly instead of clicking on the high beams. So far, getting all the parts will be harder than doing the actual work. Good luck to all doing g this and please post all your progress.

 

[G-Oil Guy]

Man. I just want the OEM switch look (and to be back lit with the rest of the switches at night) but that seems expensive for a switch. Oh well. Guess I’ll just have to get something as close as possible.
Thanks for the info though! I was looking for this type of info a while ago

 

[silentsnow31802]

Okay im hell bent on getting this to work in an OEM sense.
For reference I have a 2025 TRD Off-Road model.

I have blank spots I can insert relays into under the hood and my AUX 1-3 fuses are already in place from the factory. I also have the plug under the hood I would put the pigtails on (Post #8 in this thread). Seems to me the engine harness is equipped to have the dealer option installed.

Like most, what I am missing is the switches in the interior and the wiring for them.

https://www.tacomaworld.com/threads/unused-connectors.838194/

This has tons of good info. Im looking through it now.
I am also missing this connector on the interior that is supposed to be part of the AUX switch system.

 

[socotaco]

Two ways I can suggest you might be able to find the part number of that gray connector:
1) If you still have access to the vehicle with the connector, with the ignition off and the key fob out of range of the truck (just being safe here), pull the connector and on the end of it there should be five very small numbers/letters which indicates which one it is. Put these characters in place of ????? in 90980-????? And this should be the part number, so you can search for it on a Toyota parts list web site.

2) See if the connector is one of these in the following pictures. I found these, but I don’t think the three are complete - soooo many different connectors on these trucks!

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