RV Wireless Air Suspension Problems: Complete Troubleshooting Guide

Bottom Line Up Front

Your 2013 motorhome with the 2012 Ford E350 chassis likely has a Firestone Ride-Rite wireless air helper system that's missing its remote controller. Based on the blanked-off plug you mentioned, this system was designed to work with both wireless remote and hardwired manual controls. You have two viable options: source a replacement wireless remote (correct part for your model - verify with dealer) for around $150-200, or install manual rocker switches using that existing plug connection for about $30-50 in parts. The manual switch option is actually more reliable long-term and easier to implement.

Root Causes

Firestone wireless air assist systems from that era commonly lose their remotes during RV ownership transfers. Common causes include the previous owner misplacing the handheld remote or it failing due to battery corrosion or water damage - these remotes are notorious for moisture intrusion issues. The wireless receiver module is probably still functional and mounted somewhere in your engine compartment or under the chassis.

The blanked-off plug you're seeing is actually a factory provision for manual control switches. Firestone designed these systems with dual capability from the start, knowing that many RV owners prefer the reliability of hardwired switches over wireless remotes. This plug connects directly to the same solenoid valves that the wireless system controls, making manual switch installation straightforward.

Your system most likely uses either two or four air bags depending on whether it's rear-only assist or four-corner leveling. The control module can handle both wireless and wired inputs simultaneously, so you won't need to disable anything to add manual switches.

Before You Start

SAFETY WARNING: Always disconnect the RV's 12V battery before working on electrical connections. Wear safety glasses when working under the vehicle. Be aware that air systems can store pressure - release air pressure before disconnecting any components.

First, locate and identify your exact Firestone system model. Look for a control module mounted in the engine bay or under the chassis - it should have a model number sticker. Common models for 2012-2013 Ford E350 applications include rear air bag systems and four-corner systems (verify exact part with dealer). Take photos of all the components and wiring you can find.

Check if the wireless receiver is still present by looking for a small black box with an antenna wire, usually mounted near the control module. If it's missing, that explains why a replacement remote wouldn't work. Examine the blanked plug carefully - it should be a 6-pin or 8-pin connector with protective cover.

SAFETY WARNING: Do not exceed manufacturer's maximum pressure ratings for your system. Check system label for pressure specifications before manually inflating air bags.

Test your air bags manually by locating the Schrader valves (similar to tire valves) on each bag and adding air with a standard air chuck. This will verify the bags themselves are functional. Consult your system's documentation for proper operating pressure range.

Gather basic electrical tools: wire strippers, electrical tape, zip ties, and a multimeter if you have one. You'll also need rocker switches rated for 12V DC at 10-15 amps if going the manual route.

The Repair Process

SAFETY WARNING: Ensure all electrical connections are secure and properly insulated to prevent short circuits. Double-check wiring against system documentation before applying power.

For the manual switch option, start by purchasing a Firestone manual switch kit (correct part for your model - verify with dealer) or individual DPDT rocker switches from an auto parts store. You'll need one switch per air bag - typically two switches for rear-only systems or four for full systems. Wire these switches to raise/lower each corner independently.

Remove the blanked plug cover carefully - it should pop off or unscrew depending on the design. Inside you'll find unused wire terminals corresponding to each air bag's inflate/deflate functions. The wiring scheme is typically: red wire for 12V power, black for ground, and then pairs of wires for each air bag (one for inflate solenoid, one for deflate solenoid).

Mount your switches in a convenient location inside the RV - many owners choose the driver area dashboard or a center console location. Connect each switch to control one air bag: center terminal gets 12V power, one side terminal connects to the inflate wire, other side connects to deflate wire. When you flip the switch up, it inflates that corner; flip down to deflate.

For the wireless remote replacement route, search for your specific model number on Firestone's website or call their technical support at 800-888-0650. Used remotes sometimes appear on eBay, but ensure the frequency matches your system. New remotes require programming to your specific receiver module following the instructions included with the remote.

Professional Help Needed

Consider professional installation if you're uncomfortable working with 12V electrical systems or can't locate the control module and associated wiring. A qualified RV service center or truck accessory shop familiar with Firestone systems can complete either solution in 2-3 hours.

Professional help is definitely recommended if you discover the control module itself is missing or damaged, or if the air bags aren't holding pressure when manually inflated. These issues indicate more complex problems requiring component replacement and system bleeding.

Some mobile RV technicians specialize in air suspension systems and can diagnose your exact setup on-site. This might be worth the $150-200 service call if you want to ensure compatibility before ordering parts, especially if you're unsure about your system's exact configuration. A qualified technician can also verify all electrical connections meet safety standards and torque all mechanical connections to manufacturer specifications.