1989 blower motor problem
Thread Starter
Joined: Feb 2007
Posts: 4
1989 blower motor problem
IM NEW TO THE CORVETTE WORLD AND THE FORUMS. SEEMS LIKE A GOOD THING. MY 89 BLOWER MOTOR DOES NOT WORK AT ANY SPEED. I DO HAVE CLIMATE CONTROL. EVERYTHING SEEMS TO WORK ON THE CONTROL PANEL. FAN SPEED GOES FROM 1 TO 10 BUT MOTOR JUST WONT BLOW. I HAVE CHECKED FUSE. FUSE OK. ANYONE GOT ANY IDEAS. ANY HELP WOULD BE APPRECIATED. THANKS
Super Moderator
Joined: Jan 2006
Posts: 1,858
From: Lumberton, Texas
RE: 1989 blower motor problem
If there is no power at the purple wire on the blower, then you have about three things that could be wrong. 1st is blower fuse (maybe A/C), second is the slide switch on the control head, 3rd is the blower switch itself, and 4th might be the blower resistor in the evaporator case.
Thread Starter
Joined: Feb 2007
Posts: 4
RE: 1989 blower motor problem
mech259: i have checked all fusesand they are all good. i have climate control so i dont have slide switch. the buttons up and down move the fan speed from 1 to 10 on front of control but fan does not blow. does this car have a blower control module? if so where is it located? ive read some of the other forums and a control module was talked about. i still appreciate all the help.....
Super Moderator
Joined: Jan 2006
Posts: 1,858
From: Lumberton, Texas
RE: 1989 blower motor problem
My bad, didn't read that you have climate control. Testing as follows:
1. Turn ignition on. Set control panel in "ECON" mode and blower motor in high speed mode (#10). With blower control module (in evaporator case, should have a 4 wire and 2 wire connector) disconnected, measure voltage between Red wire and ground.
2. If battery voltage is present, go to next step. If not, check Red wire and Rust colored fusible link for an open circuit.
3. Measure voltage between Red wire and Black wire. If battery voltage is present, go to next step. If not, check Black (ground) wire for open circuit to ground. Ensure that that right rear engine compartment ground is clean and tight.
4. Measure voltage between Brown wire and ground. If reading is app. 5 volts, go to next step. If not, check Brown wire for open circuit. If wire is ok, replace blower control module.
5. Measure voltage between Purple wire and ground. If reading is 12 volts, go to next step. If not, check Purple wire for an open or short circuit to ground. If wire is ok, replace blower control module.
I will post a wiring diagram for you shortly. [8D]
1. Turn ignition on. Set control panel in "ECON" mode and blower motor in high speed mode (#10). With blower control module (in evaporator case, should have a 4 wire and 2 wire connector) disconnected, measure voltage between Red wire and ground.
2. If battery voltage is present, go to next step. If not, check Red wire and Rust colored fusible link for an open circuit.
3. Measure voltage between Red wire and Black wire. If battery voltage is present, go to next step. If not, check Black (ground) wire for open circuit to ground. Ensure that that right rear engine compartment ground is clean and tight.
4. Measure voltage between Brown wire and ground. If reading is app. 5 volts, go to next step. If not, check Brown wire for open circuit. If wire is ok, replace blower control module.
5. Measure voltage between Purple wire and ground. If reading is 12 volts, go to next step. If not, check Purple wire for an open or short circuit to ground. If wire is ok, replace blower control module.
I will post a wiring diagram for you shortly. [8D]
Thread Starter
Joined: Feb 2007
Posts: 4
RE: 1989 blower motor problem
mech259: thanks for the info. it will be first of next week before i will get a chance to check the module out. ill let you know what i find out. one more question....do i have to crack open the evaporater case to get to the module or is it on the outside of the case? thanks again...
