Once again I saved a pile of money by surfing internet auto forums.
This Spring I tried out the air conditioning
on our 04 Toyota Sienna and it didn't work. I popped the hood and noticed the compressor didn't come on. Jumped on the Sienna forum and read about a common relay fault problem with these vehicles. Did a simple relay swap with the horn relay and wha-la, we have cold air, and the horn failed to operate indicating a bad relay. $30 for a new relay and all is well. One guy on the forum was quoted $1,200 from a dealer and his too only had a $30. relay problem.
Once again the internet auto forums have save me a lot of cash.
PS.... 5 years ago I had a battery
parasite drain issue on the G35 and the dealer wanted $2,000 to replace the radio. I pulled the radio and let my electronic wizzard buddy have a crack at it. He spent an hour with it, worked his magic, and it has been working good ever since.