Where is the PCM on a 2005 Dodge Ram?

In most 2005 Ram pickups, the Powertrain Control Module (PCM) sits in the engine compartment on the passenger side, mounted to the inner fender near the firewall. It’s typically located close to the brake booster and ABS module. While this is the common arrangement, variations can occur depending on engine and cab configuration.

Understanding the PCM’s role and its location

The PCM is the central computer that manages engine and transmission functions. Its location matters because it affects how you access wiring harnesses for diagnostics, testing, or replacement. The Ram’s PCM is designed for heat exposure and serviceable access, which is why it sits in the engine bay rather than under the dash.

Where to look in a 2005 Ram

To locate the PCM, start with the passenger side of the engine bay. Look for a large black rectangular module with a multi-pin connector. It is usually bolted to the inner fender panel or the firewall area and is often just behind the brake booster. If you have a non-Hemi engine or a different cab layout, the exact mounting point may shift slightly but remains in the same general region.

• Open the hood and stand on the passenger side near the brake booster for reference.


• Identify the large black rectangular module with a multi-pin connector and several harnesses feeding into it.


• Check the inner fender or firewall on the passenger side; some models mount the PCM to the inner fender behind heat shields or plastic covers.


• If the module isn’t obvious, inspect behind the right front headlight or in the wheel-well area behind the inner fender liner for alternative mounting.


• If in doubt, consult the vehicle’s service manual or a trusted parts diagram for your specific engine (e.g., 4.7, 5.9, or 5.7 Hemi) and cab configuration.

Note that some Ram configurations place the PCM near the ABS module or alongside the fuse/relay center. The general rule is: it’s on the passenger side of the engine bay, in the area around the firewall and brake components.

What to do if you can’t locate it

If the PCM isn’t easily found in the common locations, take these steps to confirm its position without risking damage to components or wiring:

• Disconnect the negative battery cable before poking around electrical components.


• Refer to the vehicle’s service manual or a factory wiring diagram for your exact engine and cab layout.


• Check reputable online forums or owner clubs for photos of the PCM location for your specific build.


• When in doubt, seek professional assistance to avoid misidentifying or damaging the module.

Some 2005 Rams use a TPM/TIPM style topology where the power distribution module is integrated with the PCM in a single housing in the engine bay. In those cases, the location will be the same general area, but the single unit will include multiple responsibilities. Verify your exact configuration before attempting removal or testing.

Summary

The PCM on a 2005 Dodge Ram is generally located in the engine compartment on the passenger side, mounted to the inner fender near the firewall and close to the brake booster/ABS module. Exact position can vary with engine type (such as 4.7, 5.9, or 5.7 Hemi) and cab configuration, so consult the manual or a detailed diagram for your model if you plan to service or replace it.

Where is the PCM located on a Dodge Ram?

The location of the Dodge Ram PCM varies by model year, but it is most commonly found on the passenger side firewall, behind the airbox (especially on older models), or behind the glove box or under the dashboard on the passenger side (on newer models). On some models, it may be located near the battery or under the engine's intake manifold. To confirm the exact location for your vehicle, consult the owner's manual or your vehicle's specific service manual.
 
This video shows the location of the PCM on a 2015 Ram and how to remove it: 53sDiabloSportYouTube · Jul 31, 2015
Common locations by model year

• 2003-2015 Ram: Often located on the passenger side firewall, behind the air filter or airbox. Some models may have it under the cowl on the passenger side. 
• 2013-2018 Ram: Frequently found behind the glove box or under the dashboard on the passenger side. 
• 2006 Ram: Typically located behind the battery tray or under the hood near the firewall. 
• 2007 Ram: May be located behind the passenger side kick panel or under the hood near the battery. 
• 2013 Ram: Located on the driver's side of the engine block, above the oil pan. 
• 2021 Ram 5500: Generally behind the breather box, but can be difficult to spot. 
• 2003 Ram 3500: Found on the left side of the engine, beneath the intake manifold, or in the right-rear area of the engine compartment under the cowl. 

This video shows how to locate the fuse and relay for the PCM on a Dodge Ram: 59sWorld MechanicsYouTube · Mar 1, 2024
How to locate your PCM

1. Check your owner's manual: This is the most reliable method to find the exact location for your vehicle. 
2. Look in the engine bay: On older models, check the firewall on the passenger side, behind the air intake box. 
3. Check under the dashboard: For newer models, look behind the glove box or under the dashboard on the passenger side. 
4. Inspect near the battery: On some models, the PCM is located near the battery on the driver's side. 

What are the symptoms of a bad PCM on a Ram 1500?

Common Symptoms of a Bad PCM

• Check Engine Light that keeps returning.
• Poor fuel economy.
• Hard or erratic shifting.
• Engine stalling or rough idling.
• Failed emissions tests.
• The vehicle won't start or stays in limp mode.
• Inconsistent sensor readings during diagnosis.
• Reflashing doesn't hold.

Where is the PCM on a 2005 Dodge Ram 1500?

The Powertrain Control Module (PCM) on a 2005 Dodge Ram 1500 is located on the passenger side of the engine compartment, mounted against the firewall, and is typically behind the factory airbox.
 
You can watch this video to see how to locate the PCM on a Dodge Ram: 37sJakob HurtYouTube · Sep 30, 2019

• Location: Passenger side, against the firewall.
• Access: It is situated behind the air filter and airbox assembly.
• Removal: To remove it, you will need to disconnect electrical connectors, then unbolt the module from the firewall, typically with a 10mm socket.
• Safety: Always disconnect the negative battery terminal before working on the PCM to avoid electrical damage. 

Where is the PCM located?

The Powertrain Control Module (PCM) is typically located in the engine bay, often near the firewall or battery, though it can also be found under the dashboard, under a seat, or behind a kick panel. For the exact location in your vehicle, consult the owner's manual or service manual.
 
This video shows the location and access procedure for the PCM in a specific vehicle: 58sChavez DIY & ReviewsYouTube · Sep 29, 2024

• Common locations:
  • Inside the engine bay, frequently near the firewall, battery, or fender well. 
  • Under the passenger's seat or in the engine compartment. 
  • Beneath the dashboard or behind a kick panel. 
• How to find it:
  • The most reliable method is to check your vehicle's owner's manual for the precise location. 
  • If the manual isn't available, look for a metal box with wiring harnesses connected to it in the areas mentioned above. 
  • If you need to access the PCM, disconnect the battery first to avoid electrical damage.