Recent content by Teaman

Measured the current of the fan with a quality amp clamp as 20 amps with the fan installed in its airbox. This was with the engine running and a voltage of 14.4 volts to the fan and feed to the activating terminal of the regulator, which is now drawing 0.08 amps. Have looked at Ebay offerings...

As this vehicle is 16 years old I'd assumed it was prior to the use of such technology, and that all the regulation was built in with the transistors. Quite happy to install a PWM controller if this is the best option. I am doing this as a favour so I'd rather do it once. The fan motor...

Oh! Not a sign of any components with coloured bands . The terminal that I'm feeding goes directly to the base of the first transistor and a small offshoot track (approx .5 mm) into some ant sized components, mainly black with silver nos. on them. These are covered in a material similar to that...

It might expect a PWM signal but I'm changing its diet to a varied voltage! ... as it makes the fan run without trusting a dead computer I also do not know what the bobbin device is for. It reminds me of the voltage/current regulators from days of dynamos. Having partially dismantled another one...

Yes the Bourns is very good but to big a commitment of time to sort one problem on what is a mobile dog kennel !

Hi CWatters and many thanks for your succinct mathematical deductions. Yes the motor was running whilst testing with the fan impeller on but in 'free air' so not under any real load. I did try starting it with the impeller momentarily held and 13.5 volts applied which gave a steady 2.5 amps on...

Hi Berkeman and thanks for your advice. In this instance the purpose of the potentiometer is to replicate the input to the existing motor speed control that no longer gets an input from the ECU.

Hi. Please could anyone advise me on selecting an appropriate Ohms and and Watts range for a Potentiometer. This is to energize the speed controller on a car heater blower motor that has lost its supply from the ECU pompously known as the Climate Control ! The blower motor is 12 Volt and fused...