Intermittent Electrical Issues on 2012

Wife's Prius is having intermittent, random electrical issues.

First problem was AC/Heater Blower Motor quit working while she was out shopping. It was dark by the time she got home so I couldn't really do anything other than verify that it wasn't working. Next morning, I went out to check fuses, connectors, etc. and magically it was running fine. Turned car off/on and cycled the AC/Heat several times and it seemed fine. Off she went to work.

Second problem. She gets in the car to come home that night and the dashboard lights are not their usual color. She says that they were "more blue than normal" and slowly drifted back to the regular color as she drove.

Third problem. This morning she starts up the car to run some errands and the windshield wipers don't work. The rear wiper was fine. She turns the car off/on a few times and tries the wipers each time with no luck. She cleans the windshield off, runs her errands, and tells me about it when she gets home. I go out to investigate and the wipers are working fine.

I have checked the fuse box and there is no moisture or other noticeable debris that would cause an electrical fault (at least none that I can see). The car has about 130K miles on it and has only given us 1 minor problem up to this point (bad door lock assembly).

Any ideas? Thanks in advance for any help.

 

Thanks for the info, fuzzy1.

Any recommended method of DIY battery testing or do I need to bring the car to the dealer?

I've got a digital multimeter and I know which end of the probes go where

 

Thanks again, fuzzy1.

Battery reads 12.6V after being left overnight. Headlights on drops it to 12.25V. Starting the car brings it up to 14.7V.

Good, Bad, or Marginal?

 

Cool, thank you. Guess we wait and see what else happens and haul it to the dealership.

 

1) Wires look good. No obvious damage and a normal level of dirt & grime for a vehicle with >120K miles. I did check the fuse box for water/damage/debris and it looks fine.

2) We have a fairly high number of suburban squirrels, rabbits, and critters but there is no apparent nibbling on the wires.

3) No accidents or damage other than parking lot scrapes and dings. Only repair we have ever had done was having a bad driver-side door lock actuator replaced. That was done under warranty at the dealership.

4) The car is my wife's, she is the original owner, and it has about 125K miles on it.

Thanks in advance for any advice!