Heater in 2003 crown vic stays on always ???? Blower motor ? Air blowing out vent's all the time ?
Blower motor speed control module .maybe ! If that is what your taking about . Can't turn blower motor off .
What popped ?????? Any light's lit on the instrument cluster , Air bag ? Do you know how to test automotive electrical circuits using a voltmeter ? How to read an understand electrical wiring diagrams ? Free wiring diagrams here http://www.bbbind.com/free_tsb.html Enter vehicle info. year , make , model and engine size . Under system click on engine , then under subsystem click on speed controls . Click the search button then the blue link . Do you know what a speed control servo is ,an what it looks like ? It's under the hood in the engine compartment . In the second diagram you'll see it an it's wiring connections . Check power and grounds for the servo. an switch input's . In the first diagram you see the switch ,inside the switch you can see different resistors ,You can test these input's to the speed control servo with a voltmeter . Check out some videos on youtube on electrical testing speed control systems an test the system .
Which insturment cluster does your's have ? electronic instrument cluster or standard instrument cluster !
Standard insturment cluster - speedo / odometer
Speedometer/Odometer
The speedometer and odometer provides speed information based on a speed/distance pulse signal from the vehicle speed sensor (VSS). The VSS is mounted on the speedometer driven gear in the transmission.
Could be the VSS is bad .
Horn
The horn system includes the following:
horn relay
horn
clock spring
steering wheel control switch harness
steering wheel pad horn switch, which is part of the driver side air bag module. For additional information, refer to Section 501-20B .
The horn is located behind the front bumper mounted to the radiator support.
Is the air bag light lit on the insturment cluster ? If it is the clock spring could be the problem . If not lit check the circuits from the horn relay .
VEHICLE RELAYS Operation Diagnosis .
Which headlamps don't work ? Low beams , high beams , both ?
The high beams are inoperative
Bulbs.
Circuitry.
Multifunction switch.
GO to Pinpoint Test C .
The low beams are inoperative
Bulbs.
Circuitry.
Headlamp switch.
Multifunction switch.
LCM.
GO to Pinpoint Test D .
Principles of Operation NOTE: Due to varying wattage ratings and resulting current draw, certain aftermarket headlamp bulbs may cause the lighting control module (LCM) to shut down the short circuit protection, resulting in the low beams becoming inoperative. Verify that the headlamp bulbs meet Ford specifications.
Headlamp System
The headlamp system consists of:
two aerodynamic halogen headlamp bulbs and retainers
headlamp switch
multifunction switch
lighting control module (LCM)
circuit wiring and circuit protection
In normal operation:
With the multifunction switch in the low beam position, power is supplied by the LCM to the low beam elements through the multifunction switch.
With the multifunction switch in the high beam position (forward detent), power is supplied to the high beam elements and to the high beam indicator in the instrument cluster.
When the multifunction switch is pulled toward the steering wheel, the flash-to-pass switch (part of the multifunction switch) is closed and power is supplied to the high beam elements. When the switch is released, they return to low beam operation.
The battery saver feature of the LCM will automatically turn off the courtesy lamps, demand lamps, headlamps, or parking lamps under the following conditions:
The ignition switch is in the OFF position.
The headlamp switch is in parking lamps ON or headlamps ON positions.
After 10 minutes.
Headlamp Switch
The headlamp switch is a multi-position switch.
The positions include OFF, PARK, and HEAD.
With the headlamp switch in the PARK position (first detent), a signal is supplied to the LCM which powers the front parking lamps, the tail lamps, the side marker lamps, and the license lamp.
With the headlamp switch in the HEAD position, power is supplied to the headlamps through the LCM and the multifunction switch.
The panel dim switch (part of the headlamp switch) is located above the headlamp switch. The panel dim switch operates only with the parking lamps or headlamps on.
When the panel dim switch is held in the up position, the instrument panel lighting will progressively brighten.
When the panel dim switch is held in the down position, the instrument panel lighting will progressively dim.
For additional information, refer to Section 413-00 .
Headlamps On Warning Chime
If the headlamp switch is left in either the PARK or HEAD position and the driver door is opened, the LCM will sound a headlamps on reminder chime when the following conditions occur:
The ignition switch is OFF with the ignition key out.
The driver door is ajar.
For additional information, refer to Section 413-09 .
Inspection and Verification
Verify the customer concern by operating the system.
Visually inspect for obvious signs of mechanical and electrical damage.
First off, to work on your own vehicles, you need a basic set of wrenches and sockets, standard and metric sizes. Remove negative battery cable first, positive battery cable second. There is probably a battery hold down clamp at lower edge of battery, use a socket with long extension to reach it. Sorry, I don't know socket size.
You might be able to use memory saver in cigar socket, to keep memory systems alive?
There may be several reasons for your issue. Check here for some of the most important: blower vents not switching
It could be an actuator(motor) that stopped working.
Here is a list of Crown Vic part:
List Blend Door Actuator 2003 Ford Crown Victoria Reilly Auto Parts
Here's an example of what may need to be done in a similar situation:
If you are handy, possibly buying a repair manual similar to this may help:
If key fits in lock but does not turn, try spraying wd 40 with a straw into lock cylinder and sliding key in and out rapidly several times and then try turning key.
If you have a 1999-2011 Mercury Marquis, Mercury Marauder, or Crown Victoria, and your headlights and or tail lights don't work, Ford just finally extended the warranty on your LCM (Lighting Control Module) for free - both parts and labor and will install a new one for free! Ford has extended the warranty to 15 years/250,000 miles. It must be done at a Ford Dealer and the fix is free. Call your local ford Dealer and tell them you need to make an appointment because your headlights don't work and Ford has extended your warranty on the LCM. Tell them it is the Customer Satisfaction Program 14N01. Have your Vin number ready as they will ask for it. You don't have to be the original owner. If they act like they don't know what you are talking about ask to talk to the manager or tell them to call Ford Motor Company and ask them, or you can call Ford yourself. We had ours done at a Ford dealer in August of 2014 in Scottsdale, AZ. It is a 15 year warranty and if you have a 1999, the deadline might have passed, but call them and ask them to see if it has. Maybe it hasn't."
