1997 mercury mystique heater blower motor quit working and its not fuse what do I check next?

If you are mechanically inclined, disconnect the harness to the blower motor. Install the fuse and see if it blows. If not, your problem is from the switch to the motor. You may have a wiring problem, or a bad motor. With blower motor disconnected, check power to the harness, both the power side and the ground side. This will eliminate the switch as the problem.

Hi Scott,your blower motor resistor may be bad,here's what it looks like,it located next to the blower motor,easy to remove.

Might be the Resistor pack located close to the blower. Could be under the dash or under the hood, but always close to the blower itself. Usually has a flat connector with 4 or 5 wires, and two small screws holding in the duct. It may be a crispy critter. It happens... The blower moves air across it to keep it cool. The blower motor may be bad as well, or possibly the fan speed switch. May very well be the fuse for the blower as well. The blower connector may be loose. Let me know what you find.

Don't know how the ABS light would be related to the blower motor, you said you checked everything - did you check the blower motor circuit for power and ground with a meter or a test light ?
Is the resistor getting power from the relay ?

Under dash fuse panel fuse 23 15amp or fuse 37 30amp Both can cause blower motor to not work

You will need to replace your speed sensor switch located beside blower motor 2inch by 1inch single plug if you had a replacement in hand you could better identify it.

This coud be one of two problems first one is the switch the second is you may need to replace the blower which is more likely as the tend to decline in performance over time due to moisture build up

check for power to the actual blower motor is the next step

if the fuse is fine you might have problems in the electric motor fan

it ur heater resitor