MM-VC4 Voltage controller for Ford 6G alternators, 3-pin RVC compatible

✅ It WILL work on: Ford vehicles that use a 6G-style alternator with a 3-pin regulator plug ONLY if that plug has a middle pin (pin #2) present and active (This is what Ford calls their RVC or computer-controlled voltage system.) The included P104 plug is included to bypass the OEM battery charging light but due to many different Ford/Lincoln/FoMoCo ECU strategies, programs or options the P104 may not actively keep the battery light off. This is not an issue for the alternator (or vehicle) as it will charge perfectly fine. If the thought of the vehicle's battery light being on is an issue, we advise to not purchase this product as we cannot guarantee the battery light will remain off due to the aforementioned reasons.

Common (but not all listed) vehicles with the right setup include:

1999–2010 F-150

1999–2014 Mustang

2000–2014 Expedition

2000–2014 Explorer

2001–2010 Windstar / Freestar (Windstar was first with PCM-controlled 6G)

2000–2010 Ranger

2000–2012 E-Series vans (E-150 / E-250 / E-350)

Various Crown Victoria, Grand Marquis, and Town Car models (early 2000s)

These years aren’t guaranteed, but they’re most likely to have the correct 6G 3-pin setup. ALWAYS check for the middle pin in the plug.

❌ It will NOT work on:

Fords with:

4G or 3G alternators

The wrong plug (missing middle pin)

LINbus or PCM-controlled Smart alternators (mostly 2022+)

Newer vehicles (2022 and up) with LIN or BMS-based charging systems

Any non-Ford vehicles — unless you’ve swapped in a Ford 6G alternator with the 3-pin plug and middle pin.

? Pro Tip: If the alternator plug on your Ford has 3 wires and a middle wire is present, you’re likely good to go. If it only has 2 wires (no middle), it’s not RVC and this controller won’t work.
Want to be sure? Send a photo of your alternator plug to tony@mechman.com — we’ll tell you right away.