Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSLINCOLN2005LS 3.0 SREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 529 (WINDOW AND GLASS)DIAGNOSIS AND TESTINGGLASS, FRAMES AND MECHANISMSPINPOINT TESTSPINPOINT TEST A: ALL POWER WINDOWS ARE INOPERATIVEPINPOINT TEST A: ALL POWER WINDOWS ARE INOPERATIVE

2005 Lincoln LS 3.0 S

Pinpoint Test A: All Power Windows Are Inoperative

2005 Lincoln LS 3.0 SSECTION Pinpoint Test A: All Power Windows Are Inoperative

WARNING: This page is about a different car, the 2006 Mercury Montego, 2006 Ford Freestyle, and 2006 Ford Five Hundred. However, it is still accessible from the selected car via links, so may be relevant.

A1 CHECK CIRCUIT 1499 (PK/LG) FOR VOLTAGE
- Disconnect: LH Front Window Control Switch C504a.
- Key in ON position.
- Measure the voltage between LH front window control switch C504a-5, circuit 1499 (PK/LG), harness side and ground.
  
  Fig 1: Measuring Voltage Between LH Front Window Control Switch C504a-5, Circuit 1499 (PK/LG), Harness Side & Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
Yes: GO to A3.

No: GO to A2.
A2 CHECK CIRCUIT 1499 (PK/LG) FOR AN OPEN
- Key in OFF position.
- Disconnect: SJB C2280e.
- Measure the resistance between LH front window control switch C504a-1, circuit 1499 (PK/LG), harness side and SJB 02280e-4, circuit 1499 (PK/LG), harness side.
  
  Fig 2: Checking Circuit 1499 (PK/LG)
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
Yes: GO to PINPOINT TEST H to diagnose the delayed accessory relay circuit.

No: REPAIR the circuit. TEST the system for normal operation.
A3 CHECK CIRCUIT 1205 (BK) FOR AN OPEN
- Disconnect: LH Front Window Control Switch C504b.
- Measure the resistance between LH front window control switch C504b-4, circuit 1205 (BK), harness side and ground.
  
  Fig 3: Measuring Resistance Between LH Front Window Control Switch C504b-4, Circuit 1205 (BK), Harness Side & Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
Yes: INSTALL a new LH front window control switch. REFER to WINDOW CONTROL SWITCH . TEST the system for normal operation.

No: REPAIR the circuit. TEST the system for normal operation.

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.