Key fob programming

I recently bought a 2004 Tundra and I was wondering how I could look up which key fob I need I bought one from Amazon but it didn’t work , I did the programming sequence and the truck went into programming mode
I bought the remote based on what I found in the manual


I also found this plug under the dash that’s just hanging

 

Buy one from the dealer??

 

Yea I would but I don’t want to buy one just for it not to be the correct one I saw something about comparing the fcc #s on the old key fob but truck didn’t have a key fob

 

If you bought one from the dealer they would make sure it would be the correct one.

that’s all I have

 

I dunno what the hell you have in your hand, but I'm wondering if your truck has one of the KARR systems in it.

I highly recommend before you post anything else, to use the forum search feature to search for: KARR

 

Plug looks like electronic brake controller.

there is a thread on keyless. 056 I believe means 3200 aka the good s, lots of info.

 

I found that the instructions were actually printed wrong. The following change (in red) made it work for me, might be worth a try:

 

That plug is for a Tekonsha electric brake controller if you're towing a trailer with electric brakes.