What wiring is this for? Help

I see an inline fuse. Dont know what these wires are for. Help. This is under steering wheel. 2003 tacoma reg cab 2.4 engine automatic

 

Not enough information from that one photo outside the fact that it is Not OEM and it is very messy work we can see 2 inline fuses there your best bet is someone installed something there and removed it before selling. That plug on the left side (far left) is OEM the plug hanging down is not.

 

Looks like an old alarm or keyless entry harness. The relay is probably interfacing the starter or ignition wire.

 

Is that for power windows or something. The oem plug?

 

More pics if it helps. Any links so i can research this?

 

I just want to put wiring back to stock. Do wiring mods once i know about them

 

Definitely an alarm. The got what looks to be the starter wire interfaced (cut) black wire. They are tapped into the white/red which is 12v. The black/red is ignition input.

Just remove it all. And connect your starred wire back to normal. They are probably tied into the parking light (white wire from alarm harness) circuit, door ajar (usually green or purple on the harness), the black is a ground wire, brown is siren/horn output.

Other wires probably for the door locks but doesn’t look like they are the standard colors (usually green and blue).

You won’t do any harm removing it all. Just be sure to reconnect that thick black starter wire going to the key cylinder or the truck won’t start

 

This is over my head. I dont have power lock nor power windows. Ok at least this is a start. I'll look at videos on how to add an alarm and power locks to get a better idea visually. Thank you sooooo much! This site is great. By black wire you mean the one wrapped in black tape?

 

Ok, didn’t know you didn’t have power locks and windows, that doesn’t matter just will be less wires that they had to tap into. That entire harness that is dangling was for an alarm. Just follow all the wires and remove them from the source (where they tap into the factory wiring. Then tap any bare wires back up. Those taps they used on the ignition wires, are called t-tap’s. You can remove them as well with a pick or flat head screw driver. They basically clamp around the wire and pierce it with 2 prongs. If the metal piece is there once you take the plastic piece off just use some pliers to pull it off the wire.

As for the black (starter) wire, I circled it in an attachment below. You’ll need to cut the butt connector off both ends where they cut it and tied into it. Then you will need to reconnect it either using another butt connector or solder it back together. It’s important to have a good connection on this wire as it provides power to the relay/solenoid that powers the starter motor. You may have to buy or use a piece of the wire they used to tie into that wire to extend it, so to speak, if it’s too short to connect. Or just try to pull on the side that’s running away from the key cylinder and you may get a little slack.

 

Thanks for clarifying black wire by circling on it. I have no power on sockets even when i changed fuse so thought these wires were probably the issue. Thank you lawfarin

 

That red wire that’s tapped into that thick white/red should have 12v on it. Unless that T-tap is fried or not plugged in correctly.

It’s hard to see exactly what’s going on as I’m sure they have crossed wires and change some of the colors. On that alarm harness the red wire is usually 12v constant and the yellow is usually 12v ignition (switched). Just snip then out one at a time so you don’t short anything out and you’ll be ok.

 

lafarin is correct... that relay is for starter disable. Every alarm I have removed has had only one wire cut and that is the starter disable wire and the relay wired in between.

 

Ok Ive re-read while looking at the wires up close. So wires dangling from lower dash is trash. Follow the source yo ignition switch and disconnect all taps. Then reconnect starter wire (black) then all done right?

 

Ok lets start with liwer dash wires. This is just yhe alarm harness that i can trash right? Even that relay? (See pic 1)

It is not connected/tapped to this relay behind fuse box (pic 2)

 

Is this the purple wire you spoke of?

 

Wires by ignition. Untap blue taps then reconnect black wires to where im pointing? (See pic)

Pic 2 is zoomed in

 

Glam see my questions to lafarin. Confirm im correct to proceed? Thank you

 

That oem is probably for power windows right? I have base model which everythi ng is manual. I plan to add power windows and locks.

 

Also is this ground wire from alarm or its part of oem connection?

 

Yep. Unplug the taps. Remove that ground. That’s for the aftermarket wiring too. Then cut those butt connected out that run to the black wire and reconnect the black wire back together. Again you might have to extended the wire a little. If so maybe just leave the butt connectors in there and cut the wire a few inches after them with a new butt connector (together)