2012 Dodge Ram 1500 5.7 HEMI Fuel Pump Relay Location: Where It Is and How to Bypass It for Good

The bottom line up front: On a 2012 Dodge Ram 1500 with the 5.7L HEMI V8, the fuel pump relay is not a standalone plug-in relay you can pull out of the fuse box. It is permanently embedded inside the Totally Integrated Power Module (TIPM), which is the main fuse and relay center located under the hood on the driver’s side near the battery and strut tower . When this internal relay fails—a documented weak spot on 2011–2014 Ram trucks—you will get a crank-no-start condition with no fuel pump prime noise . The most reliable permanent fix is an external relay bypass that routes power around the TIPM entirely, restoring the fuel pump circuit with a standard automotive relay and fuse .

Where Exactly Is the TIPM and the Fuel Pump Relay?

The TIPM on your 2012 Ram 1500 is a large black plastic box in the engine bay. It sits on the driver’s side, up against the fender, right next to the battery and near the strut tower . The cover snaps off without any tools. Inside you will see rows of fuses and a few plug-in relays, but the fuel pump relay is not among them. It is a surface-mount relay soldered directly to the internal circuit board of the TIPM . That is why you cannot simply swap it out like an older truck’s relay—the fuel pump relay is not a serviceable component on its own .

To inspect the relay area, you need to remove the TIPM cover. If you want to test the circuit deeper, unbolt the TIPM from its bracket and inspect the underside, where the circuit board is accessible . But for most owners, the practical approach is not to dig into the board itself—it is to diagnose the circuit from the fuse slots and connector pins, then install a bypass.

Why the TIPM Fuel Pump Relay Fails on 2011–2014 Ram Trucks

The TIPM controls almost every electrical function on the 2011–2014 Ram, including the fuel pump relay . The relay is soldered onto the circuit board, and over time it fails due to faulty diodes, worn contacts, or cracked solder joints. Heat, vibration, and electrical stress inside the engine bay accelerate the damage . Many owners report the same story: the truck runs fine for years, then one day it cranks but won’t start, and the fuel pump never primes .

This is not an isolated problem. The 2011–2014 Chrysler, Dodge, and Ram TIPM fuel pump relay is a widely documented weak point, with many owners reporting intermittent no-start conditions, sudden stalling, and fuel pump issues . There is no active recall covering the fuel pump relay on the 2011 Dodge Ram, but there have been technical service bulletins and a class-action lawsuit settlement related to TIPM failures addressing issues like stalling and no-start .

Symptoms of a Failing Fuel Pump Relay (Not the Pump Itself)

Before you spend money on a new fuel pump, recognize that many of these symptoms point to the relay, not the pump :

1. No fuel pump prime noise. When you turn the key to the ON position, you should hear a two- to three-second whir from the fuel tank . If you hear nothing, the relay is likely not sending power to the pump .

2. Engine cranks but will not start. The starter turns over fine, but the engine never fires because there is no fuel pressure .

3. Intermittent stalling. The truck runs fine, then suddenly loses power and dies. After a few minutes it restarts. This points to an intermittent relay contact failure .

4. Hard starting after sitting. If the pump loses prime because the relay cuts power intermittently, you may need to crank several times before the engine fires .

5. No check engine light or fuel pressure code. In many cases, the PCM does not store a code for a relay failure because the relay is before the PCM’s direct control loop .

6. Fuel pump runs continuously with the key off. This is the flip side—the relay contacts weld shut and the pump never shuts off, draining the battery and possibly flooding the engine .

Step-by-Step Diagnosis: Confirm the Relay Is the Problem

Follow this order before you cut any wires or replace any parts :

Step 1: Check the fuel pump fuse. Open the TIPM, locate the fuel pump fuse (usually a 20-amp fuse), pull it, and check for continuity. If it is blown, replace it but investigate why it blew . If the pump stops running when you pull the fuse, the relay is sending power continuously .

Step 2: Listen for the pump prime. Turn the key to ON and listen near the fuel tank. If you hear the pump run, the relay is working and the problem is elsewhere .

Step 3: Test for power at the fuel pump connector. Access the fuel pump electrical connector under the vehicle near the tank. With the key ON, you should see battery voltage for a few seconds. If you have voltage but the pump does not run, the pump is bad. If you have no voltage, the relay or wiring is the issue .

Step 4: Measure fuel pressure. Attach a fuel pressure gauge to the Schrader valve on the fuel rail. With the key ON, pressure should climb to around 50–58 psi and hold. If pressure is zero or very low, suspect the relay or the pump .

Step 5: Jump the relay circuit temporarily. Find the contacts for the fuel pump relay in the TIPM. With the key ON, use a jumper wire to bridge the power feed to the fuel pump circuit. If the pump runs and the truck starts, you have confirmed the relay circuit is the problem .

Only proceed with a bypass once you have confirmed power is not reaching the pump when the relay is in place, but the pump runs fine when jumped directly .

Where to Find the Power and Ground Wires for the Bypass

If you confirm the relay is faulty, you have three main options. The table below compares them :

The permanent external relay method is the most reliable long-term fix recommended by mechanics and factory service bulletins . Here is how to do it:

Parts you need :

• A standard Bosch-style or Mopar relay (part number 68142156AC works well)
• A 30A fuse and weather-sealed inline fuse holder
• 14-gauge wire (a few feet, matching color if possible)
• 3/8-inch wiring loom for protection
• Heat shrink tubing and electrical tape
• 14-gauge eye connectors for battery and ground terminals

Tools :

• 10mm and 13mm sockets
• Wire strippers/crimpers
• Heat gun
• Soldering iron and solder (recommended for reliable connections)

Step-by-step wiring :

1. Disconnect the negative battery terminal first to prevent shorts and protect the TIPM and electronics.

2. Locate the TIPM and identify the fuel pump relay pins. Remove the TIPM cover and consult the diagram printed on the cover or your owner’s manual to identify the fuel pump relay pins.

3. Confirm the pin configuration before cutting. Compare your truck’s pin connectors with the known bypass diagram. Pin assignments vary between years and models, so verify first to avoid damage.

4. Wire the external relay. You are creating a new circuit that bypasses the TIPM entirely:

   • Pin 30 (common): Connect to battery positive through the 30A inline fuse.
   • Pin 87 (normally open): Connect to the fuel pump positive wire that leads to the pump itself.
   • Pin 85 (coil): Connect to a switched power source that gets power only when the ignition is ON, so the pump does not run with the key off.
   • Pin 86 (coil): Connect to ground.

5. Route the new wiring carefully. Use the wiring loom to protect the wires from heat and abrasion along the frame rail.

6. Reconnect the battery and test. Turn the key to ON. You should hear the fuel pump prime for two to three seconds. Start the engine and confirm it runs.

Important Warnings for Any Bypass

• Do not use a temporary fuse-tap bypass as a permanent fix. The connections can loosen over time, and bad connections have been known to cause fires .
• Do not use an accessory power slot (like the cigarette lighter) for the trigger wire in a bypass. It leaves the fuel pump running when the engine is off, which is dangerous .
• Remote start may not work with a bypass cable installed. Monitor the cable for heat. If the wire feels hot, the cable or connections may be overloaded .
• If your fuel pump runs continuously with the key off, do not replace the pump first. The pump is usually fine. The problem is almost always in the relay circuit or wiring that controls power to the pump .

What About Replacing the Fuel Pump Itself?

If your diagnostic tests show the pump is truly bad—for example, you have battery voltage at the pump connector with the key ON but the pump does not run—then a relay bypass will not help. You need a new pump .

Gasoline engines in Dodge trucks like the 5.7L HEMI V8 use an electric fuel pump assembly located inside the fuel tank . This assembly includes the pumping mechanism and the fuel level sending unit that provides readings to your fuel gauge . These pumps are designed to maintain consistent pressure for the fuel injectors, typically around 50–60 PSI depending on the engine application . Most modern Dodge fuel pumps operate at 58 to 62 PSI, with flow rates varying by model and engine size .

Common symptoms of a failing pump include engine sputtering at high speeds, difficulty starting, a whining noise from the fuel tank, loss of power under load, and poor fuel economy . If the check engine light comes on with codes like P0087 (low fuel pressure) or P0230 (fuel pump circuit malfunction), the engine control module has detected a problem with the fuel delivery system .

Why Choose KEMSO Fuel Pumps for Your Dodge Ram

If your diagnostic confirms the fuel pump itself needs replacement, the next decision is which brand to install. KEMSO offers a strong option for Dodge truck owners.

KEMSO fuel pumps are high-performance, OEM replacement units built to match or exceed factory specifications. They are designed to deliver consistent fuel pressure and flow, which is critical for the 5.7L HEMI V8’s fuel injection system. The brand is known for offering lifetime warranty coverage on their products, which means you get peace of mind long after the installation. Whether you are replacing a worn-out factory pump or you simply want a reliable aftermarket upgrade, KEMSO provides a dependable choice without the high dealer markup.

You can browse the full KEMSO fuel pump lineup and find the correct fit for your 2012 Dodge Ram 1500 at their official website: https://www.kemsoracing.com/ . Their product range covers a wide variety of vehicles, including trucks, SUVs, motorcycles, and watercraft, so you can trust the brand’s experience in fuel delivery systems.

Final Thoughts

Finding the fuel pump relay on a 2012 Dodge Ram 1500 5.7 HEMI is the easy part—it is inside the TIPM under the hood on the driver’s side . The hard part is dealing with the fact that the relay is not replaceable on its own. You either replace the entire TIPM (which is expensive) or install a permanent external relay bypass (which is affordable and reliable) .

Before you buy any parts, run through the diagnostic steps in order: check the fuse, listen for the prime, test for power at the pump, and jump the relay circuit to confirm the problem is the relay . If the relay is confirmed bad, the external bypass is a proven permanent fix. If the pump itself is bad, consider a KEMSO OEM replacement with lifetime warranty from https://www.kemsoracing.com/ .

Either way, you do not have to let a TIPM relay failure leave you stranded. With the right diagnosis and the right fix, your 2012 Ram 1500 will be back on the road, starting reliably every time.