QuestionI have a 2000 Chevy Blazer. Today when I started the car, there is no fan and this is quite a problem when it is -30 outside! While driving to work the fan came on 2 minutes before I got to my destination. This afternoon, however, I couldn't get the fan to turn on in heat or A/C. Thanks! I'm freezing up here in Saskatchewan!
AnswerOK,
Take a test light and probe the PURPLE wire at the 2 wire electrical connector on the blower motor and attach the alligator clip to a ground source OTHER than on the blower motor casing. Does the test light illuminate in ANY speed setting ?.
If it DOES. attach a jumper wire from the blower motor metal casing to a good metal ground source, Does the test light illuminate and the blower operate ?.
If it DOES, You have a bad ground circuit at the BLACK wire at he blower motor connector.
If you have NO light illumination in either of the above tests: loacte the blower motor relay that is usually monuted on the firewall about 6 inches to the right of the blower motor towards the center of the firewall. There should be 4 or 5 relays on a bracket. Your relay should be the closest one to the blower motor. and has the following wire colors:
terminal 30 = PURPLE which goes to the blower motor.
Terminal 85 = BLACK which goes to GROUND.
terminal 86 = Orange which goes to the control panel in
the vehicle.
terminal 87 = Orange which goes to a 30 amp fuse that has
battery voltage at ALL times.
terminal 87A = DARK BLUE which goes to the BLOWER MOTOR
RESISTOR.
let me know if this helps you diagnostics.
I can scan and e-mail you an electrical schematic from a 2004 of which should be the same as your vehicle PROVIDED you can read an electrical schematic. PLEASE BE HONEST and tell me if you CAN or CANNOT raed a schematic so I don't have to go thru all the work of pulling the book, Scanning the pages and e-mailing them.
if you want the schematic, You will need to contact me at:
meperganfortis@msn.com
In order for me to send you some electrical schematics and pictures related to your problem, as this website is NOT mine and I am only a VOLUNTEER helping answer simple questions to those in need as this website DOES NOT allow pictures to be sent..
Please include all of the previous information already said here about your vehicle to my above said e-mail address.
let me know.
autohelp
