OK, this is what I found.
1) No power to blower motor - already knew that
2) No signal coming from Heater/AC Control in dash to the blower motor control module
3) C1 - C12 has 12V on the Heater/AC Control connector in dash
4) With ignition in run position, C1 - C5 has 10.5V on Heater/AC Control connector
5) No shorts or opens on any related circuits
Now ALLDATA says, based on these measurements, the heater/AC control needs to be replaced. However, I am concerned about this 10.5V. I wonder if it is related to my other problem.
I also have this problem with there only being around 10V at the batter after starting the car and shutting it off a couple times. I usually have a hard time starting it and have to jump start it every couple times. I got a new battery and it does the same thing, the old one actually tested as good. I noticed that if I took a long ride, (>30 minutes), it will start without a problem. It's those short trips to the store that really causes it to need a jump start the next morning. It also seems to not matter if the car sits for a few hours or a few days. I took a 2 hour trip and parked it for 3-4 days and it started up without a problem. But my girlfriend has driven it a couple blocks down the street to get gas and it wouldn't start at the gas station.
I really want to figure this out without spending money on unnecessary parts. Thanks for any replies.
Monday, February 18th, 2008 AT 11:37 AM