What is the wiper speed switch on a Ford?

The Ford wiper control system on late model vehicles is completely different than anything you’re used to in the past. Examine the Ford wipers wiring diagram below. First, notice thathe wiper speed switch is now called a multi-function switch (MFS).

What to look for in a Ford wiper wiring diagram?

Then check for power at the relays. Follow the Ford wiper wiring diagram and check for power at the relay contacts and control coil. Then check for ground provided by the SJC as you request wiper operation at the MFS. Finally, check for good ground conditions at the MFS, SJC, Wiper motor and washer motor.

How does the SJB work on a Ford wiper?

The SJB measure the voltage drop and based on the remaining voltage, determines what setting the driver has requested. The SJB then applies a ground to the appropriate relays which then provide power to the wiper motor and washer motor. As you can see by the Ford wiper wiring diagram, the system uses several fuses:

How are the wipers connected to the ignition?

Green: to accessory on ignition switch via a fuse. Ties to green that exits from park circuit. Black: Attaches to body of motor then to earth. Blue (lo): energised on the other side of the green main power. Assuming attaches to combination switch for wipers which then earths (confirm?)

What is the MFS switch on a Ford wiper?

Examine the Ford wipers wiring diagram below. First, notice thathe wiper speed switch is now called a multi-function switch (MFS). It does not actually switch power to the wiper motor. It just acts a signaling device to tell the Smart Junction Box (SJB) what action you’d like it to take.

How are wire nuts used in a motor wiper?

When splicing wires together, constantly use approved line connectors (“wire nuts”). Outlet receptacles in addition to switches in many cases are created with push-fit wire connection slots upon the back, together with the traditional screw-terminal cable connections on the attributes from the device.

What is the MFS switch on a wiper?

First, notice thathe wiper speed switch is now called a multi-function switch (MFS). It does not actually switch power to the wiper motor. It just acts a signaling device to tell the Smart Junction Box (SJB) what action you’d like it to take.

What are the fuses on a Ford wiper?

As you can see by the Ford wiper wiring diagram, the system uses several fuses: • 10A fuse for the low current board in the SJC to receive the washer signal from the MFS and provide ground to the washer relay. (the low current circuit board is in the SJC) Then check for power at the relays.

Can a low speed windshield wiper still work?

Use your multimeter to bridge between the low speed terminals on the switch and the wiper motor; with the switch moved to “Low” you should get at least a 10-volt reading. If you do, the wiring is fine; if you do not, the wiring has failed. Repeat the exercise with the intermediate speed.

What kind of motor does a windshield wiper use?

Windshield wipers are powered by a motor that receives 12-volt power through a switched wire. Complete failure of the wipers to work can be a complicated troubleshoot, but working with a motor that still runs on one speed is less challenging. Diagnosis can be time-consuming, but it is not complex and requires only one tool.

Is there a ground wire for a windshield wiper?

Most wiper motors have a dedicated ground wire in their harness, however some utilize the bolts securing them to the body as a ground.

When do I Know my wiper relay is bad?

One of the quickest indicators that a problem exists with the intermittent wiper relay is when the wipers are not intermittent and only work at one speed. The relay switch sends an electrical signal to the module that controls the operation of the wiper motor and gears inside.

Why does my car not have a wiper motor?

This is usually caused by the wiper motor not getting the power that it needs due to a bad relay. In most cases, a professional mechanic will replace the intermittent wiper relay and the controls at the same time to ensure all of the supporting connections work smoothly together.

What happens if the intermittent wiper switch fails?

However, when one part malfunctions, it can cause potential safety concerns. One of the most common parts to fail is the intermittent wiper relay switch. The electronic relays that are installed in today’s cars, trucks and SUV’s have to operate in very hot and grueling conditions or are subject to constant abuse.

When do windshield wiper blades only work one speed?

The windshield wiper blades have one speed. One of the quickest indicators that a problem exists with the intermittent wiper relay is when the wipers are not intermittent and only work at one speed.

Why are the wipers on my car not working?

Torn wiper blades, a bad wiper motor, a blown fuse, or heavy snow may be why your wipers are not working. Keeping your windshield clear is paramount to a safe driving experience.

What is the reliability score of a 2006 Ford Escape?

The Reliability score is based on our latest subscriber survey of 2006 Ford Escape owners. The owner comments describe problems respondents experienced with this vehicle.

How to test the wiper switch function step by step?

TEST 4: Wiper Delay Circuits. TEST 5: High Speed Circuit Resistance Test. The wiper switch function within the Multi-Function Switch usually doesn’t go bad. Doesn’t mean it doesn’t happen, because it does and when it does you’ll see one of the following symptoms: No High Speed Wipers. No Low Speed Wipers. No Medium Speed Wipers.

How to fix intermittent wiper and turn signal problems?

Disengage the plastic snap clips and separate the two halves of the steering column cover. Multifunction switch levers control headlights, flashers, wipers and intermittent windshield washers. The MFS is usually held in place by hex-head or Torx screws. Remove them, pull out the switch and disconnect the electrical connector.

How many wires are in the wiper switch?

Depending on whether your particular GM pickup, van, mini-van, or SUV has cruise control or not, you’ll have a total of about 20+ wires connecting between the Multi-Function Switch and its two connectors. Don’t worry, we don’t need to test all of the wires to check the wiper switch function within the Multi-Function Switch.

Where is the intermittent wiper control located on a car?

A partial or complete loss of intermittent wiper control. To fix these two problems, you’ll need a shop manual, a digital multimeter and possibly some Torx bits. On most late-model vehicles, the MFS is located under the plastic covers behind the steering wheel.

What are the most common intermittent wiper failures?

The two most common failures are: 1 A broken turn signal “canceling” mechanism that won’t shut off the “blinkers” after a turn, 2 A partial or complete loss of intermittent wiper control. More

Is there any way to troubleshoot a Ford wiper motor?

Or you may be having trouble getting your wipers to work at all. Fortunately, the motor unit can be replaced. However, before replacing the motor, you should troubleshoot the problem. There are several simple solutions that can solve most Ford wiper motor problems. Open the fuse panel cover under the steering wheel.

What should my ohm be on my wiper motor?

Touch one of the voltmeter leads to one of the terminals on the motor and touch the other lead on the voltmeter to the other terminal on the motor. The Ohm reading should be at or near “0.” A .05 Ohm variance is acceptable. If the meter reads “1,” then the motor has failed and needs to be replaced.

What is the wiper speed switch on a Ford?