Ford Bronco II Power Steering Pressure Switch Guide: 1984-1990
If your Bronco II stalls when parking, this simple switch could be the reason why.
- A failing switch is a common cause of stalling when turning the wheel at low speeds.
- Check for fluid leaks coming from the switch itself, even from the electrical connector.
- Replacement is a simple, DIY-friendly task that takes less than 30 minutes.
- Choosing a premium aftermarket brand like Standard Ignition is recommended for reliability.
Symptoms of a Failing Power Steering Switch
A bad power steering pressure switch can cause frustrating, though usually not dangerous, problems. The most common issue you'll notice is with the engine's idle. Because the switch fails to tell the computer to compensate for the load, the engine may stumble or stall completely when you turn the steering wheel at low speeds. Another common failure is the switch itself leaking power steering fluid. This can happen at the threads, but often the seal inside fails, and fluid can even be pushed out through the electrical connector.
Choosing the Right Aftermarket Part: Brand Quality
For a vehicle like the 1984-1990 Bronco II, finding new original parts from Ford (Motorcraft) is nearly impossible. The aftermarket is your primary source. The quality of these parts can vary, so it's important to choose a reputable brand.
- Premium Aftermarket (Standard Ignition): Standard Motor Products (SMP), the company behind the Standard Ignition brand, is a well-known and respected manufacturer. They are known for producing parts that meet or exceed original equipment (OE) specifications. Their switches are 100% pressure tested and use specialized seals for durability. For a critical-function part like this, a premium brand like Standard is a reliable choice that is less likely to fail prematurely.
- Standard / Value (True Tech): "True Tech" appears to be a private-label or store brand rather than a dedicated parts manufacturer. These parts are typically sourced to provide a lower-cost alternative. While they may function correctly, they may not have the same level of quality control, material specification, or longevity testing as a premium brand like Standard Ignition. For a part that is simple to replace and relatively inexpensive, a value brand might be acceptable for a budget repair, but the risk of early failure could be higher.
| Part Type | Estimated Cost | Notes |
|---|---|---|
| New Aftermarket | $32.25 - $60.96 | This range covers both value brands and premium brands like Standard Ignition. |
| New OEM (Motorcraft) | Not Available | No longer manufactured by Ford for this model year. |
| Shop Labor | $50 - $100 | Typically a very quick job (0.3-0.5 hours of labor). |
Known Issues, Recalls, or TSBs
There are no specific recalls or Technical Service Bulletins (TSBs) from the NHTSA for the power steering pressure switch on the 1984-1990 Ford Bronco II. Stalling issues are widely discussed in owner forums, with the switch being a common culprit suggested by other owners.
Frequently Asked Questions (FAQ)
Where is the power steering pressure switch located?
The switch is screwed into the high-pressure power steering line. This is the line that runs from the power steering pump to the steering gear box. Look for a small, typically metal and plastic sensor with a two-wire electrical connector on it.
Can I replace this part myself?
Yes, this is a very easy DIY job for most home mechanics. It usually takes less than 30 minutes. You will need a wrench or a deep socket to fit the switch. Simply unplug the electrical connector, place a rag underneath to catch a small amount of fluid, and unscrew the old switch. Screw the new one in, reconnect the plug, and top off your power steering fluid if needed.
My switch is leaking from the electrical plug. Is that possible?
Yes. This is a very common sign of failure. The internal seals of the switch break down, allowing pressurized power steering fluid to push through the body of the sensor and out of the electrical connector. If you see this, the switch must be replaced.
Will a bad switch cause a Check Engine Light?
On the pre-OBD-II system in the Bronco II, it is less likely to trigger a light than on a modern car. However, some owners have reported that a failed switch can log a code 52 during an OBD-I diagnostic test. The primary symptoms are physical (stalling, rough idle) rather than a warning light.
Technical Specifications
OEM Part Numbers: E5TZ3N824A E57A3N824AA
Connector: 2-Terminal, Male Pin. Mount: Screw-in.
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Ford Bronco II: