I used to drive this car a cpl yrs ago and the horn worked at that time. Recently stated driving it again, was on the way to work when a very large 4x4 wanted the spot of the road where I was currently on, I’m pushing on the horn long and hard he couldn’t hear it neither could I mainly because it’s broken.i did my inspection and assessments got the plugs all where they needed to b nothing found the lack of relay n fuse, also fuse block( im sure that’s the wrong nomenclature) p1/2 40amp. I finished beating my head on the wall and. Read that most times it’s the clock spring prob. Now I understand abt everything goes back just like it was, everything, exactly like it was, after the fact . So my Q is I’m guessing it was malfunctioning some because only the horn was having prob nothing else. In the process of taking aid bag, steering wheel and then checking the culprit out I’m sure I did t put It in the exact way it was before because now when I go to put it in gear it will only go into neutral no matter I go R or D followed by the “check hybrid system”’. In my defense clock spring was very loose, spin freely. Is that normal ? Please advise, any and all thoughts are welcomed, thanks
If I weren't too late I'd have advised a more systematic approach to tracking the problem down. There's a circuit from the steering wheel pad contacts to the integration relay input pin (passes through the spiral cable/"clock spring" and a couple more intermediate connectors), and then there are separate circuits from two integration relay output pins to the two horns (a blue wire to the high-pitched horn and a black wire to the low-pitched horn). So I might have started by just grounding the input pin at the integration relay. If that made a honk then the relay and the horns are fine and I need to look for a problem between there and the steering wheel. If it didn't make a honk then I would consider the relay or the downstream circuits, and so on. I'm guessing the troubleshooting steps in the repair manual turn out to be a lot like that. Toyota Service Information and Where To Find It | PriusChat By now, of course, Other Things have happened, and the best move now is to use a Prius-capable scan tool and get the codes to find out what Other Things the car is complaining about.
