Fix Your Tach Signal on Cummins Swaps — The Right Way

The Swap Helper Tach Adapter is the simplest and most reliable way to get a clean tach signal on your Cummins swap. Whether you're dealing with a dead tach, bouncing RPM readings, or lost cruise control, this module corrects the signal so your truck functions properly.

⚠️ If your tach doesn’t work after a Cummins swap — this is the fix.

This tach adapter converts the Cummins engine speed signal into a format your truck’s ECM and cluster can understand. This ensures proper operation of:

✔ Tachometer (no bounce or dropouts)

✔ Cruise control (on applicable setups)

✔ Charging system (on certain platforms)

✔ Other RPM-dependent functions

Common problems this fixes:

- No tach reading

- Jumping / unstable tach

- No cruise control after swap

- Charging issues tied to RPM signal

Most Cummins swaps struggle with tach signal compatibility. Without the correct signal, your truck may run but key systems won’t function correctly.

This module eliminates the need for tone wheels or complex custom solutions by using the factory Cummins sensor signal and converting it properly.

Compatible with:

• Cummins 12 Valve, 24 Valve, and Common Rail engines

• Ford gas and diesel platforms (including 6.0, 6.4, 7.3, and more)

• Various swap applications requiring a 4-pulse tach signal

Install Notes:

• Uses factory Cummins RPM signal

• Requires proper wiring and configuration

• Best results with quality soldered connections

Why Buy From Fummins Tuning:

✔ Real-world swap experience

✔ Proven parts that actually work

✔ Support from people who understand Fummins builds