Vehicle make/model = 2001 Pontiac Grand Am
Mileage = 80000
Engine size = V-6
dash lights = no
codes = no
work done prior = My daughter has this car at college in
Warrensburg,Mo, about 45 miles from home. She called me and said her blower
moter
quit blowing in the middle of winter. I had her bring it home on Friday
evening so I could check it out.
work done to repair = The fuse in the passenger compartment was OK. The
30 amp fuse in the engine compartment was blown. I put a new one in
and when I turned on the blower motor it instantly blew again. I took out
the blower relay and it has a corroded post so I replaced it and the
fuse. The blower now works on high speed only. It has 5 speeds and only
works on #5.
tech = JK
question = What else can I check short of replacing the blower motor?
Is there a speed control swith that can be replaced?
JK:
A common cause for only high speed is the blower resistor. It is under the passenger
side of the dash, in front of the blower motor, up against the firewall. The circuits
burn, and only high works because high is on a different circuit, and does not go
through the resistor. If not the resistor, then will need to check for inputs to the
resistor from the fan speed switch. On the connector of the resistor, 1 wire will always
be hot, then an additional wire will go hot as you turn the fan speed switch. Speed 1
will make one wire hot, speed 2 will make a different wire hot, and so. Those can be
checked with a test light at the resistor connector.
Back
Mileage = 80000
Engine size = V-6
dash lights = no
codes = no
work done prior = My daughter has this car at college in
Warrensburg,Mo, about 45 miles from home. She called me and said her blower
moter
quit blowing in the middle of winter. I had her bring it home on Friday
evening so I could check it out.
work done to repair = The fuse in the passenger compartment was OK. The
30 amp fuse in the engine compartment was blown. I put a new one in
and when I turned on the blower motor it instantly blew again. I took out
the blower relay and it has a corroded post so I replaced it and the
fuse. The blower now works on high speed only. It has 5 speeds and only
works on #5.
tech = JK
question = What else can I check short of replacing the blower motor?
Is there a speed control swith that can be replaced?
JK:
A common cause for only high speed is the blower resistor. It is under the passenger
side of the dash, in front of the blower motor, up against the firewall. The circuits
burn, and only high works because high is on a different circuit, and does not go
through the resistor. If not the resistor, then will need to check for inputs to the
resistor from the fan speed switch. On the connector of the resistor, 1 wire will always
be hot, then an additional wire will go hot as you turn the fan speed switch. Speed 1
will make one wire hot, speed 2 will make a different wire hot, and so. Those can be
checked with a test light at the resistor connector.
Back
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