I own a 2002 crown vic my radio works but the clock on it stopped working also the heater / ac fan will not come on no matter what i try the motor wont speed up i have checked all fuses but have not dug into the relays

could be airlock in heater core

check the heater core

It may need the accessory wire powered for clock check wire diagram

you need to replace the blower resistor...90 percent of the time that will be the problem in your situation...before replacing it..check for power to blower motor first...if it has power then replace blower motor if not its the resistor

Does it take a long time to warm up the engine?

It's a blower motor resistor out of a 2002 or newer grand marquis/crown Victoria and some Lincoln models. On the early crown Vic's that this fits the resistor is on the passenger side of the engine compartment kind of behind the heater hoses. First you need to remove the vapor management valve. Then remove the heater hoses. You can then unplug the connector for the blower resistor and remove the screws.

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

Yes it is your blower motor that is going bad, eventually if not fixed then it will stop blowing all together.

does it have a digital control panel? As this uses an electronic blower speed controller located at the engine compartment (rear engine block) fix on ac phlenum try to shake the connector or wire while the system is on.

look for relay or resistor heater box under hood passenger side follow heater hoses 2 two heater box coming out of fire wall

Try checking all the grounds for the radio, over time they can weeken. If that doesn't work, put in a new ground wire with a heavier gauge, that should fix it. It sounds like a ground problem.

Good luck, Daniel