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! have a 12v linear actuator that is powered by a 12v supply thru a dpdt switch. I want to regulate the speed of the actuator by using a pot, I bought one that was a b10k, 1/2 w that burned right up. What's the proper size that I should use??

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A pot to control current is nothing more than a variable resistor. Go on line ,type in voltage /watts and amps and you will get pages of formula that will allow you to calculate the resistor needed for the job. another way is to get an accelerator control for a electric scooter and use that..

Posted on Nov 23, 2014

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Cruse control on 2008 Chevy Suburban stopped working. Changed the brake lamp switch (twice). Any suggestions? Where is the fuse located?


This is a computer controlled system (BCM) supply's power to switch .Voltage is supplied to the cruise control switch via the steering wheel control switch reference voltage circuit supplied by the BCM.
The following are the main components of the Cruise Control System:
• The accelerator pedal
• The stop lamp switch
• The body control module (BCM)
• The cruise control switches
• The engine control module (ECM)
• The throttle actuator control (TAC) motor
• The vehicle speed sensor (VSS)

Taking your vehicle to a quailfied repair shop would be your best option . Using a factory scan tool to view input data from switches and sensors is the only way to diagnose the cruise control on your vehicle . Just replacing parts does not cut it .

The body control module (BCM) monitors the signal circuit of the cruise control switches. The BCM relays the cruise control switch status to the engine control module (ECM) via the GMLAN serial data circuit. The ECM uses the status of the cruise control switch to determine when to capture and maintain the vehicle speed. The ECM monitors the vehicle speed signal circuit in order to determine the desired vehicle speed. The ECM uses the throttle actuator control (TAC) motor in order to maintain the vehicle speed. For further information on the TAC System, refer to Throttle Actuator Control (TAC) System Description .

This is not a fuse problem !!!!!!!!!

You probably don't know what GMLAN serial data is ,do you ? It's GM 's version of C.A.N. How to Diagnose Controller Area Network CAN

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How to fix a window driver's side on a Nissan quest 2004....


First, you must establish what the issue is:
  1. Check for supply voltage to the actuator switch. If there is voltage TO the switch, activate the switch, and test for voltage on the switch output. If there is no voltage to to the switch, trace the issue back to the fuse panel. If there is voltage at the switch input AND voltage at the output of the switch, continue...
  2. Is the vehicle equipped with an "express" automatic window mode? If so, check to be sure the microswitch on the regulator is functioning. Also, verify that the automatic module (located in the armrest) is operating. Continue...
  3. When the actuator switch is operated, check for voltage at the motor. If there is voltage at the motor, make sure that the regulator mechanism is not jammed. (Has it been lubricated in the past 10 years?) Continue...
  4. If the actuator is operating and the regulator mechanism is operating correctly but the power window still does not work, replace the window motor.

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What causes a/c to blows cold on driver's side and hot on passenger side ?


There is a little motor on the heater box under the dash that needs to be replaced. It's called a blend door actuator...

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My drivers side window will not roll up


pull the door card off and check for power to the regulator motor when switch is engaged-if there's 12v to the motor it needs to be replaced- cheers Denny

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1984 ford f150 ignition switc/ actuator rod. For years now I have been using a pair of pliers to start my truck, I roll the key forward to disengage the steering wheel lock, then push the actuator rod...


Yea, you'll still need your key to unlock the steering wheel. Just get a properly rated DPDT (double pole double throw) switch that is "on-off-on" from radio shack or somewhere similar, as we'll as a momentary switch/push button to actuate the solenoid. Make one position on the DPDT your accessory position and the other your run position. Make sure it's in the run position when you go to start it. Again, you will need the key to unlock the column and possibly your shifter. Look up diagrams to figure out which wires you will need to have on the switch. It'll take a little engineering on your part, but if you know your wires, you can do it. Best of luck!

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P01544 OBD 2 code


P01544 -Throttle Actuation Potentiometer Signal too High*************When selecting a valve actuator the correct type and size can be found utilizing the following selection criteria:
  1. Power source -The common sources of power for automated valves are electricity or fluid power. If electric power is selected, a three-phase supply is usually required for large valves; however, small valves can be operated on a single-phase supply. Usually an electric valve actuator can accommodate any of the common voltages. Sometimes a DC supply is available. This is often an emergency back-up power supply.
    Variations of fluid power are much greater. First there is a variety of fluid media such as compressed air, nitrogen, hydraulic fluid or natural gas. Then, there are the variations in the available pressures of those media. With a variety of cylinder sizes, most of the variations can be accommodated for a particular valve size.
  2. The type of valve -Whenever sizing an actuator for a valve, the type of valve has to be known, so that the correct type of actuator can be selected. There are some valves that need multi-turn input, where as others need quarter-turn. This has a great impact on the type of actuator that is required. When combined with the available power supply, then the size and type of actuator quickly comes into focus.
    Generally multi-turn fluid power actuators are more expensive than multi-turn electric actuators. However, for rising non-rotating stem valves a linear fluid power actuator may be less expensive. A definitive selection cannot be made until the power requirements of the valve are determined. After that decision has been made, then the torque requirement of the valve is the next selection criterion.
  3. Calculating the torque required by the valve -For a quarter-turn valve, the best way of determining the torque required is by obtaining the valve maker's torque data. Most valve makers have measured the torque required to operate their valves over the range of operating line pressures. They make this information available for customers.
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If an actuator is required to control a level, flow or pressure in a system, then it may be required to move frequently. Modulating or positioning control can be achieved using the same 4-20 milliamps signal. However, the signal would change as frequently as the process required. If very high rates of modulation are required then special modulating control valve actuators are needed that can accommodate the frequent starts required for such duty.

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