Wiring diagram for the start,run and accessories

buy the adapter here or get the service manual


https://www.scosche.com/car-audio/installation/harness

10000 alarms sold in a brown box and no2 the same.
nobody can guess what is in your hands ever, Impossible,.
the box has no instructions.? used off ebay dirt cheap sure.
there are alarms from simple to complex
even blocking spark, fuel and the starter.
and more.
I have ripped out more than I've installed, and may remote start junk.
what I do us just put a secret fuel pump switch that nobody can find.
(even secret magnetic key switches,) <<< savvy no?
the less parts the less likely it can fail.

log in and read, like all ASE techs do. (or at alldata.com)
for tie in, rules (schematics) oem perfect.

https://eautorepair.net/Marketing/Default.asp

Power in from fuse 27 on Blue/red wire
violet/green and brown/yellow are powered when key is in Accessory and RUN position
Blue/white is powered when key is in START Position
White/brown is powered full time and goes to shift interlock solenoid

With the connector halves close together can you tell which wire goes into the connector? Its probably the same color, but check anyway. Once you are sure you can follow that one back to where it comes from and check for power

How was the horn kit wiring harness installed? Was it patched in? Did it have its own wiring harness? Trying to figure out how that kit could have had any effect on the starter.

When the key is on do you have accessory power?

Those are accessory functions working off the ignition switch when in accessory position or run position of the key. Were you to check if the wiper and radio fuse had power to them in the run or accessory position as they should, likely they would not. Power from the switch goes to the fuse panel, powering the fuses and circuits that only work with key in on or acc., either a direct wire to the fuse panel or sometimes, fuses get power from an accessory relay that sends power to fuses, but relay has to get a signal from a good working switch before it powers the fuses.
What I'm trying to say, is the bad switch is probably the reason you have no wipers, radio, or mirrors.

It would be a very small amount. Ohms equals resistance to current passage. What you are looking for in the switch is continuity between certain terminals when switch is moved through all positions. Sorry I don't have the necessary diagram. Check a repair manual for your toyota. There are only 4 positions: off, on or run, accessories, and start. You have a hot wire coming into the switch, and routed out another way by the switch's position, now the run position would have to connect with both run and accessories-...I know I'd have to have a diagram, too many fuzz balls in my head!

Eg wipers work while ignition switched to 'accessories' but stop when key turned to 'start'

I had this issue and took me ages and ages of wire tracing and probing. Your fuse box should have the wiper/windows accessories fuses. If you probe them and they aren't showing voltage, check wiring harness, check wiper motor voltage. My ignition barrel was the fault of all this, everything worked when switched to "accessories", but while the engine was running, the accessories turned off. The bottom of the ignition barrel pushed out, as the factory stopper groove bent out. All I did was cold chisel a dent back into the case. BAM fixed my windows/starting/wipers all in one go.

Your switch has 4 terminals.

1. Red is the hot wire from the battery.
2. Dark Blue is the run wire. This wire powers PCM, and engine and well as all accessories when the key is on.
3. Yellow is the start wire. It powers the engine, ECU and starter circuit when the key is turned to start.
4. Last terminal is accessories. I don't know the color, but it will power the radio, blower, windows, mirrors, etc. when key is turned to ACC. Some diagrams of the switch are below. Please let me know if you have any questions.

If its not on the steering column, you can figure it out using an ohmeter on the switch leads. Actually, you could figure out the one on the column that way too! just think about what the switch does in each position and attach wires that do it to the post that does it! IE: starter solenoid wire goes to post that is hot when key is turned all the way to start. Main hotlead is the one that is common to all switch positions. run and accessories is to the post that is hot with key on, accessory only is the one only hot with key turned backwards.