hi,
I added a 600W amp and have 2 JL Audio 12" bass wedge in the trunk. It thumps ok, no issues there but in my fanagling with installing it (about a year ago) I used a piggy back jumper to wire the switch into the mini fuse block. I think it's in the horn slot bc it's always on and I am ashamed to admit it but my horn doesn't work. Is there a Haynes or a Chilton book I can buy to see just what the hell I did? My inspection is a year over due also, I'm just lazy AF I guess. Just need to fix the horn, wire the amp up correctly to the aux and make this right. I hardly drive it anymore bc of covid and just let it slide too long.

If anyone has the wiring/fuse block map or can take a pic of the cover I know it has the layout on it. i've just lost the cover somewhere in the pit I call a garage.

Thanks.

 

The horn may have its on fuse labeled HORN 10A. There is a horn relay whose solenoid is controlled by the horn switch. The fuse is between the horn and relay.

Haynes and Chilton manuals may stop at 2017.

You should be able to access wiring diagrams at the Toyota site below for a small cost for 2 days.https://techinfo.toyota.com