Marquis Blower Motor Problem

[D.L.]

The blower for my 2004 Mercury Marquis AC/defrost quit working? I
checked the under dash fuses and power distribution fuses and they look
ok. When I turn the defrost fan on, I hear a clicking noise behind the
glove compartment when the dial goes to high, but there is nothing
coming out the vents at any speed selection. I don't have automatic
temperature control.

I was thinking about swapping the 301(blower motor) and 304(heated
backlight) relays to see if the relay is bad. It doesn't want to pull
out. Is a special tool needed, or just pull harder?

[*]

Post by D.L.
The blower for my 2004 Mercury Marquis AC/defrost quit working? I
checked the under dash fuses and power distribution fuses and they look
ok. When I turn the defrost fan on, I hear a clicking noise behind the
glove compartment when the dial goes to high, but there is nothing
coming out the vents at any speed selection. I don't have automatic
temperature control.
I was thinking about swapping the 301(blower motor) and 304(heated
backlight) relays to see if the relay is bad. It doesn't want to pull
out. Is a special tool needed, or just pull harder?

Geez!

You're doing an awful lot of work when a simple 12-volt test light used at
the motor connection COULD tell you everything you need to know.

Got a full 12 volts at the connection?

Chances are its the motor......

[D.L.]

Post by *

Post by D.L.
The blower for my 2004 Mercury Marquis AC/defrost quit working? I
checked the under dash fuses and power distribution fuses and they look
ok. When I turn the defrost fan on, I hear a clicking noise behind the
glove compartment when the dial goes to high, but there is nothing
coming out the vents at any speed selection. I don't have automatic
temperature control.
I was thinking about swapping the 301(blower motor) and 304(heated
backlight) relays to see if the relay is bad. It doesn't want to pull
out. Is a special tool needed, or just pull harder?

Geez!
You're doing an awful lot of work when a simple 12-volt test light used at
the motor connection COULD tell you everything you need to know.
Got a full 12 volts at the connection?
Chances are its the motor......

Everything I've read says its usually the relay/resistor, and
rarely the blower motor. My electronics is not very good and
I don't know where the blower motor is, or where to check the
voltage on it. I do know where the relays and fuses are.