Pressure Transducers – Installation and Use

Originally Posted by 46highboypu I have finally bled the brakes and have pedal pressure but not sure if there is enough. My question is if the brake lights don’t come on is there enough line pressure or am I looking at another problem. The switch is an aftermarket in-line pressure activated unit. The lights work with the light switch but I am also having a problem with the turn signals, is this the reason no brake lights or too little fluid pressure? Thanks for an answer for either fix. It doesn’t take much pressure to activate one of those switches, far less than it takes to stop the car. However the quality of the switches has dropped sharply in the past few years. I now avoid them altogether.

Watts Happening

The normally open contact N. Vehicle is started through the NC contact allowing the fuel pump to run while starting, then when oil pressure is built up the fuel pump continues to run through the NO contact. You may have noticed that the Holley diagram does not call for one when using their switch and pump. However, it would not hurt anything to use a relay with the oil pressure switch as a pilot device.

If using a fuel pump that requires high current, the relay would be mandatory. I hope this clears things up for anyone that was puzzled.

Wiring an ignition switch involves locating the ignition switch, identifying the pins, disconnecting the negative battery cable, connecting the lead wire to the ACC terminal, connecting the relay wire to the ST terminal, connecting the ignition wire to the IGN terminal and reconnecting the negative battery cable.

On the GPIO, the connections are: Ampseal connector pin 13, CANL: Ampseal connector pin For the pressure control PC solenoid: You need a minimum 4. This resistor dissipates up to 4 Watts of power at low line pressures maximum PWM percentages. As a result, the resistor can get hot, so mount it on a heat sink ideally a metal block in an area with plenty of air circulation.

In conjunction with that resistor, you will need a 1N recirculation diode placed between pin C and D on the 4L60E connector the closer to the transmission connector the better. Be careful to orient the diode correctly. These two additional external components cut the flyback spikes from the solenoid to manageable levels preventing damage to various GPIO board components and potentially cleaning up external signals such as the VSS.

The illustrated instructions are here: Install an external diode between that solenoid’s voltage supply and the line going to the GPIO board. The banded end of the diode goes to the voltage supply wire, the non-banded end of the diode goes to the line to the GPIO board. Install the diode as close to the solenoid as is convenient.

Float Switch Installation Wiring And Control Diagrams

By Chris Tice DIY Construction Expert Replacing your submersible water pump can be easy, but before pulling that pump from the ground you need to safely assess what type of system already exists. Then you’re ready to start the process of getting everything replaced and wired properly. Start at the Breaker Panel The main breaker panel should have a wiring schedule handwritten inside the front door panel. Use this guide to find which circuit is your submersible pump and turn it off. Now look to see if the breaker takes up two breaker spaces or one.

Two spaces is a volt system and one is a volt system.

The term warm-up regulator is a bit of a misnomer in that this component actually regulates control pressure the entire time the engine is running. It changes the pressure during the warm-up period. Power is applied to a bimetal strip in the regulator when fuel pump is on.

The following instructions are for creating a MegaSquirt to Relay Board cable. It is for those who are creating their own harness. With both boxes mounted, measure the distance between them from DB connector to DB connector – this will be the length that you will cut the individual wires. If you are not using a Relay Board, allow enough length in each of your wires to reach the target component. It is often better to be too long and trim afterwards, than to be too short and have to splice additional lengths on.

For a Relay Board cable, you can move both heat shrink pieces to the center of the wire length, and then twisting the center of the wire with a few twists to hold the heat shrink in place, so that it does not fall off the wire or run down while soldering the connection. For a pigtail, you can slip the heat shrink tubing on later.


Next Page of R4 info. My manual explains how to adjust the cable, but it doesn’t seem like its describing too good cause I can’t follow it at all. Actually all the parts you need for the Lockup convertor to work is already in the unit. I have never seen the need for a brake light switch from a late model vehicle to cancel lock up of the converter.

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Supercardioid Shotgun A microphone’s directionality or polar pattern indicates how sensitive it is to sounds arriving at different angles about its central axis. The polar patterns illustrated above represent the locus of points that produce the same signal level output in the microphone if a given sound pressure level SPL is generated from that point.

How the physical body of the microphone is oriented relative to the diagrams depends on the microphone design. For large-membrane microphones such as in the Oktava pictured above , the upward direction in the polar diagram is usually perpendicular to the microphone body, commonly known as “side fire” or “side address”. Some microphone designs combine several principles in creating the desired polar pattern. Omnidirectional[ edit ] An omnidirectional or nondirectional microphone’s response is generally considered to be a perfect sphere in three dimensions.

In the real world, this is not the case. As with directional microphones, the polar pattern for an “omnidirectional” microphone is a function of frequency. The body of the microphone is not infinitely small and, as a consequence, it tends to get in its own way with respect to sounds arriving from the rear, causing a slight flattening of the polar response. This flattening increases as the diameter of the microphone assuming it’s cylindrical reaches the wavelength of the frequency in question.

Therefore, the smallest diameter microphone gives the best omnidirectional characteristics at high frequencies. Omnidirectional microphones, unlike cardioids, do not employ resonant cavities as delays, and so can be considered the “purest” microphones in terms of low coloration; they add very little to the original sound.

Air Compressor Anatomy 101

The company that installed it has come out several times to check it out but found no high pressures. I decided to take the high pressure control out of the picture and see if I could eliminate a bad pressure switch. All pressures were good 69 suc. Watching it run for about 15 min.

I have two wells with two tanks. I have it set up so I can run each submersible pump separatly. Each pump has it’s own pressure switch. I would like to remove the .

Why Do You Need It? When a house is built in an area that is not served by a municipal water works, a private well system is used. The well pumps used in most systems are quite powerful, often capable of delivering more gallons of water per minute than any single faucet could draw. Everybody I have spoken to in the plumbing or water-well business says that well pumps can burn out prematurely if they are made to start and stop more than necessary.

By using a holding tank, the water can be used in a leisurely manner over a long time, and the pump will run briefly to refill the tank. A pressure tank can be as simple as a big metal chamber with one hole in the bottom for water to flow into. As the pump pushes water in, the air in the tank is compressed. At some point, called the cut-out pressure, a switch interrupts the power to the pump and no more water enters the tank.

Since there is compressed air above the water, there is enough force acting on the liquid to push it out of the tank, through the pipes, and all the way upstairs possibly several flights of stairs to the faucet. Air can be dissolved in water, believe it or not.

What’s the Deal with the Battery Disconnect Switch?

The information presented below is a collaborative effort by several people. The people providing this information may or may not be providing completely accurate information. The information may or may not be relevant to your situation or particular equipment and may or may not comply with local codes. The information should be used as a reference source only. If you are not sure about anything presented, please do not risk your safety, property or life.

Second switch is an end-wired or end-of-run switch. Both three-wire and two-wire cable with ground are used. Tip:The traveller wire is connected in the light ceiling boxes, with a length of neutral wire taped black to indicate a hot wire.

February 17, , I’m after some advice, but first I’ll share what experience I’ve had on the ABS system which may be of help to someone this is the early ABS system up to All the problems I’ve had are to do with the modulator, there are a number of parts to it that will cause a failure if they malfunction. These are the solenoids, the pump and the limit switch. You can check all of these for basic functionality ie check they’re not seized. There are two solenoids and they are controlled by a voltage applied via the three pin connector on the side of the modulator.

To check they are not seized remove the three pin plug and on the three pins on the modulator put an earth on the center pin this is from memory so check wiring diagrams first and briefly touch 12V on each of the outer two pins, you should hear a click as the solenoid moves if 12V on both outer pins produces a click then the two solenoids are OK.

Be careful not to short across the pins as access is difficult as the connector is deep and narrow 2 Pump: This is controlled by a voltage to the single connector on the side of the modulator. To check this ensure the modulator is earthed remove the plug on the connector and briefly apply 12v to the connector and you should hear the motor spin. This is what the wires running from the plastic cover on the top of the modulator connect to, the wires run to a two pin connector near the modulator.


Sharp knife or slitting tool Wire strippers Drill with long auger electrician’s bit Coil of electrician’s fish wire Grounding screws Black tape Three-way switches require a three-wire cable: The cable should also have a ground wire, or a total of four wires in the cable. The system also requires three-way switches. The switches are wider than regular single-pole switches and they have three terminal screws on the side sometimes back of the switch housing.

Two terminals will be on one side of the switch housing; one terminal on the other side. Four-way switches have four terminals.

After installation, be sure the pressure switch is set low enough to If your pump start-up pressure is different from the factory precharge, adjust the tank pressure with the empty tank to your Complete installation should look like drawing below. SUBMERSIBLE PUMP WITH VERTICAL TANK. 6 STEP 1.

The Rest of the Story I wanted to respond to some of the comments for posterity’s sake. If you don’t know what “in series” means, you probably shouldn’t be doing electrical work. I understand what it means in general but was somewhat confused by this setup and how to apply “in series” to the current situation. The reality was that I wasn’t actually doing the work myself. The guys who dug my well were installing all of this equipment. I didn’t always trust the work they were doing so I was asking them to explain things to me.

When the installer explained how he was going to wire the contactor, he told me he was only going to have one wire going to the coil and leave the other side without any wire connecting to it. By the time he was finished, he realized he made a mistake and had it wired like Tester ‘s diagram. Per Tester ‘s comment, why are you using a contactor at all? What type and size of well pump submersible, jet pump and is it currently hard-wired or plugged-in?

Also, what is the model of the float switch you have? Hopefully it’s a “PMU” model pump-up , but they also have versions with and without plugs which is why I ask.

Tutorial – Pumptrol – Install your Pumptrol Pressure Switch