Switched out the CPK sensor still no spark it turns over. I've found two fuses both ri the PCM that aren't getting any juice. No idea how to fix that

 

Not sure I understand exactly what you mean.

Are you telling us there is no power coming to the fuses or no power going out of the fuse ? Did you try those two fuses with the key on?

Can we ask what type test equip you have to use?

 

I can definitely help you diagnose the no-start issue with your 2005 Ford Five Hundred. Here's what we know so far:

• Symptoms: Engine cranks but won't start, no spark even after replacing the CPK sensor.
• Possible cause: Two blown fuses related to the PCM (Powertrain Control Module) not getting power.

Here are some steps you can take to troubleshoot the problem:

1. Identify the blown fuses:

• Locate the fuse box under the hood and in the driver's side dashboard.
• Consult your owner's manual or a fuse box diagram online to identify the specific fuses related to the PCM. These might be labeled as "PCM," "Ignition," or "Coil."
• Check the fuses visually for any broken filament or discoloration. You can also use a multimeter to test for continuity.

2. Determine the cause of the blown fuses:

• Blown fuses are usually a symptom of another underlying issue. It's important to find out what caused the fuses to blow before replacing them.
• Common culprits include:
  • Short circuits: Damaged wiring or faulty components can cause electrical shorts that overload and blow the fuses.
  • Overload: A malfunctioning component drawing too much power can also blow the fuses.
  • Faulty relay: A stuck or malfunctioning relay in the circuit can cause the fuses to blow repeatedly.

3. Fix the underlying issue:

• Once you've identified the cause of the blown fuses, you need to address it before replacing the fuses. This might involve:
  • Repairing damaged wiring: Look for any frayed, melted, or pinched wires in the circuit.
  • Replacing faulty components: If a component like a relay or sensor is causing the short circuit, it will need to be replaced.
  • Diagnosing and fixing the overloaded component: You might need to consult a mechanic for proper diagnosis and repair of the overloaded component.

4. Replace the blown fuses:

• Once you've fixed the underlying issue, replace the blown fuses with fuses of the correct amperage rating.
• Warning: Do not use a higher amperage fuse than specified, as this can increase the risk of fire or damage to electrical components.