2007 Prius wont start, no response, new 12 v installed.

I'd put my money on a combination meter failure.

 

There is a lot of FUD out there about Prius headlights. Lights that go on and off on a Prius with HID lights, is a bad bulb. These bulbs do not go out and stay out when dead, that's not how the plasma ignition in the salt region of the bulb works. On an oldschool halogen with a filament, when the filament burned out, the bulb was dead dead dead, never to make light again. In a HID bulb, when it can't ignite the salt to make the proper plasma arc, there is not light. But that depends on the temperature and all sorts of other things. So it is completely possible for a dead bulb to turn back on. This is excellent if you understand what it means. That means you need to replace BOTH bulbs because they fail around the same time. And while waiting for the weekend to replace them or a service appointment if that's how you roll, you have a work-around to make light by turning it on and off.

 

Tried to read error codes via OBD?
(Maybe you know someone with a diagnostic device. Or a Bluetooth adapter (ELM327) for 5.- and a smartphone will do, too.)

 

I had the HID lights in my 2008 Prius and they were trouble. Toyota replaced the bulbs under warranty and I ran with them on all the time.

I had to replace the bulbs a couple of times and they aren't cheap and the last time I had to replace the ballast that sits inside the headlight assembly. The ballast don't like water and they are in the bottom of the headlight assembly, guess where the water goes. I ordered a ballast on line and found good documentation on how to change it. Don't over think the light, try a new bulb then change the ballast.

The car starting problem, do you have battery voltage at the terminal in the main fuse box under the hood where you jump the car? You can check it right at the battery but you should have the same voltage up front also, this is a good starting point. Do you have a meter to read voltage? If you don't buy one and learn how to use it. There are a lot of videos on YouTube that show you how. Checking battery voltage, fuses and old fashioned light bulbs are a good start.

 

I would still suspect a bad connection somewhere, probably between the 12V and ground. Can you get a voltage reading at the jump points under the hood? Perhaps you have enough power to unlock the doors and turn on the interior lights but not enough to put the car in Ready mode.

 

Headlights don't light up? Rear, brake and turn lights, too?
Saying you see the lights in the doors, when the doors are open, you see the lights in the trunk, in the cabin and at the makeup mirrors, too? Horn?
I would check every circuit at its fuse with a Multimeter. Perhaps you can isolate a damaged circuit. And maybe the wiring diagrams can help you further to locate the problem.

I've uploaded the whole manual including wiring diagrams to my Google Drive. You should find it here:
2006 PRIUS Repair Manual - 2006 PRIUS Electrical Wiring Diagram

 

I'm having same problem. Even with brand new 12v battery car won't go into "ready". No power period. Also, smelled like chlorine prior to dying. Please let me know if you figure this out. Not ready to get a new car.

 

It sounds to me like your new 12V was not installed properly, if you smell gas. There is a tube that is supposed to vent the gases produced by the AGM battery to the outside. Not venting the gas will not prevent your car from starting, but it could be dangerous if the gas builds up inside the passenger compartment.

If that part of the installation was not done correctly, I wonder if the rest was. I believe the advice given to the poster (to check the voltage at the jump points under the hood) would apply here as well. If voltage is insufficient there, the problem has been identified as a bad connection from the 12V to ground.

 

The chlorine smell occurred just prior to car dying. It was very potent, actually seemed to come from engine compartment, not rear of vehicle. The new 12v was put in afterwards.

 

what does the 12v measure in the morning before turning anything on?

 

what reader does he have? prius needs a very specific code reader.

 

Ok, I don't know how to explain that. Something might have been sucked into the HVAC vents, which may have nothing to do with the car dying. All the same, I would try to get hold of a multi-meter and read the voltage at the under-hood jump points.

 

never heard of it.