Scotty,
I have a 2010 Toyota Venza with AWD and a V6 engine. It has 112,000 miles on it. I was attempting to tap into the 12v wires in my rear view mirror, and I was using a volt meter to find the wires to use. My first mistake was to not turn off the headlights, and the battery went dead. I jump started the car and charged the battery fine. I was not able to determine the correct wires to use, so I did not tap in. The problem I am having is that there is no power going to the rear view mirror, the power windows or the power sunroof. Also the headlights do not come on in the "auto" mode, but do come on in the "on" mode. I have a small inexpensive code reader and it did not register any codes. It appears that I damaged something in the electrical system either by shorting a circuit in the mirror wiring while testing, or by jump starting the battery. What can I do to find the problem and fix it?
Thank You,
gkd56
Sounds like you blew a fuse in the Driver's Side Instrument Panel Fuse Box
There is a different fuse for every door, then there is headlights and sunroof.
Kinda true. But a single fuse like ECU-IG1 for example, provides power to the mirror AND to the Sliding Roof Control's ECU, as well as Automatic lighting and also a power input to the Multiplex Communication System and the Main Body ECU
.
And if these control modules are missing a power input some systems which rely on that power input won't function
.
It's worth your while to check all the fuses
Thanks Jack, that makes sense.
I checked the fuse and it was bad, so I replaced it and everything works fine. it's amazing how one tiny fuse can control so many different things. From now on I will use a known ground when checking for power.
Thank You
With modern cars where everything is controlled by control modules and there are multiple pins on the wiring connector you're better off using a wiring diagram to know for sure which wire is Power than risking shorting a control module to ground and burning out the module.