Why Your Dodge Cranks But Won't Start After Installing a Push Button Start System

If you've finished installing an aftermarket push button start system on your Dodge, pressed the START button, heard the engine crank, but the engine simply refuses to run — don't panic.

This is one of the most common questions we receive from Dodge owners.

The good news is that if the starter motor is already cranking the engine, your installation is probably much closer to working than you think. In many cases, the problem isn't the push button start system at all. Instead, it's usually related to the vehicle's factory security system.

This guide explains the most common causes and how to diagnose them step by step.

First, Understand What "Cranking" Means

Many people use the words "won't start" to describe several completely different problems. Let's separate them.

Step 1 — Verify Constant Power

Begin with the basics. Using a digital multimeter, confirm that the EFHIPS module receives:

• Constant 12V Battery Power
• Good Chassis Ground

Step 2 — Confirm Brake Input

The brake signal tells the EFHIPS module that engine starting is allowed.

Without a valid brake signal: The START button simply cycles through ACC → IGN → ACC without engaging the proper starting sequence.

Most Dodge vehicles provide a positive brake signal when the brake pedal is pressed. Always verify this with a multimeter.

Step 3 — Check IGN1

The White wire powers:

• PCM
• Dashboard
• Engine Management

Step 4 — Don't Immediately Blame the Push Button System

One of the biggest mistakes installers make is replacing wiring over and over again.

If the starter already cranks, the EFHIPS module has already performed one of its most important jobs successfully. At this point, the issue is often somewhere else.

Step 5 — Understand Dodge Factory Immobilizer

Many Dodge vehicles use one of Chrysler's factory security systems. Depending on model year, you may encounter:

• SKIM (Sentry Key Immobilizer Module)
• SKREEM (Sentry Key Remote Entry Module)
• Factory Immobilizer

These systems look for the correct transponder chip inside the factory key. If the security module cannot recognize that chip, the engine may:

• Crank normally
• Fire briefly
• Stall immediately

Step 6 — Is a Bypass Module Required?

Not every Dodge requires an additional bypass module. Some older mechanical-key vehicles can operate without one. Others require the factory transponder to remain detectable throughout the starting process.

Requirements vary by:

• Model
• Year
• Engine
• Factory security configuration

Step 7 — Bench Test the Module

Before reinstalling everything, perform a simple bench test.

Connect only:

• Constant Battery
• Ground
• Push Button

Press the START button. You should hear the internal relays clicking. This confirms:

• Module CPU
• Relay outputs
• Push button communication

are operating normally.

Step 8 — Don't Worry About the Blue LED

Many customers contact us because the small blue LED never lights.

Step 9 — If Remote Start Doesn't Work

Remote Start requires every safety condition to be satisfied.

Check:

• Parking Brake Input
• Fuel Pump Detection Wire
• Vehicle Locked
• Security Mode Armed

Step 10 — Avoid Guessing Wire Colors

One mistake seen repeatedly is relying on online wiring color charts.

Manufacturers often change wire colors between:

• Model years
• Trim levels
• Engine options

When Should You Suspect the EFHIPS Module?

The control module itself is rarely the cause.

Before considering a hardware problem, confirm:

• Constant battery power
• Ground
• Brake input
• ACC output
• IGN1 output
• Starter output
• Factory immobilizer
• Wiring continuity

Only after verifying these items should the module itself become a suspect.

Final Thoughts

Installing an aftermarket push button start system on a Dodge is usually straightforward when every ignition circuit is identified correctly.

If your engine already cranks, you're often much closer to success than it feels.

Most no-start situations are ultimately traced back to:

• Factory immobilizer recognition (SKIM / SKREEM)
• Brake input
• IGN1 wiring
• Incorrect vehicle signal identification

Taking the time to diagnose each circuit carefully will almost always save more time than repeatedly moving wires or replacing components.

At EFHIPS, we recommend testing each circuit methodically, using a multimeter, and understanding how the factory security system works before making wiring changes.

If you still need assistance, our technical support team is always ready to help you review your installation step by step. Proper diagnosis is the fastest path to a successful installation.