The blower doesn't work for the a/c - 1998 Lincoln Mark VIII

check the blower relay if ok
check the blower moter for power and that it works
then the last check out the fan switch

Hit the blower motor with a hammer handle and see if it starts, if it does replace the blower motor, if it doesn't replace the blower motor resistor located next to the blower motor in the air ducting with the connector sticking out of the air ducting

Could be the blower motor, resistor, fan switch, or fuse.

If the blower does not work at all the first thing I would do is tap the blower motor with the handle end of a large screwdriver with the key on and the blower speed set to high. If the blower starts to work than replace it. If it still doesn't work wiggle the connector at the blower motor. If it starts to work replace it.

Other wise read through this how to tip

http://www1.fixya.com/cars/r6571076-blower_motor_not_work

If that doesn't help than I will need to know if you have manual or automatic HVAC. with automatic you will set a temp and it will automatically maintain that temp.

Once I know that I will be able to help you identify the blower motor relay.

If you have any questions let me know!

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

If this is the Manual A/C type, there are two common occurances affecting blower operation.
1st, there is intermittent contact in the blower motor brushes. You can check this by locating the blower motor housing under the dash on the Right Hand side (Passenger Side). With the Ignition Key in the "ON" position, blower switch on "HIGH" firmly slap the housing with your hand. If the motor starts working, there's your problem. If it doesn't, rig up a 12 volt test light bulb and back-probe the connector to the blower motor - Does the light bulb turn ON? If so, then the problem is with the blower motor itself. If it DOESN'T turn on, then the problem is elsewhere (blower relay, blower control switch, or wiring to the motor or from the motor to ground.
Go to www.hmaservice.com and register your vehicle by VIN #.. you'll then have access to wiring diagrams, shop manuals, service bulletins, campaigns, illustrations and procedures, etc.

SOUND LIKE BAD BLOWER MOTOR RESISTOR.CHECK BLOWER MOTOR HI BLOW FUSE AND RELAY.YOU WILL NEED OWNERS MANUAL IN GLOVE COMPARTMENT TO LOCATED BLOWER MOTOR FUSES AND RELAYS.

Being a Plymouth,I would look at the fan switch in the dash,bet it doesn't look ok !!

Two possible areas I would check using an ohm meter. First is the blower resistor which is usually located by the blower motor and looks like a cement rectangle or a ceramic tube with wires attached to it. The resistor should have very low resistance but should not read open from the common lead to the other terminals. If it tests good test the continuity of the fan switch. Some cars have a fuse for the high and low blower speeds so you can check your fuse diagram and look for two blower or fan fuses. Good Luck.

Needs a blower motor resistor.

if you are getting power at the fan plug, it is possible that the recycled motor is bad.