Speedtoys

There is so much..effect on (mostly in order, and each magnifies the other) air temp, altitude, antifreeze mix ratio, maintenance quality, what radiator you have (rad, airflow seals, under trays)..that exit temperature is a much better place to derive how to operate a complex system of flaps and fan speeds.

BTU/HP loss from cooling, is not the same, everywhere, so I would argue that 6c loss in one place, with one config, will have a lot of variation around the major configuration variances I listed.

At least we don't have relative air flow problems to math in too.

Speedtoys

Agreed, make mistakes...good one.

And, the display is the engine temperature..why would the operator need the returned coolant temperature as well?

It would be interesting, but imagine the dealer visits when the values are misused and mis interpreted...kind of like how most cars no longer have an accurate temp gauge, but a needle that never really moves. I kinda like watching the effect on the gauge of flaps and fans.

jrbetz

Hello. I know this thread dates back a few years but I am hoping to locate one of the old “plug and play” Derale master fan controllers. Anyone have any suggestions? I am only getting 4.7v to the passenger side cooling fan so it’s not coming on. We tested the fan itself and it works when jumped from the other side’s connector, so it’s a power issue. Thanks in advance for any help.

FredR

THE PWM module has probably gone south

76FJ55

I have a spare Derale 16795 PWM fan controller, which is what Carl shows installed in this thread. He states that he used the factory wiring, but I don't believe it is quite plug-and-play. the Derale unit uses ring terminals to attach the wires, where the factory plug uses pins. You would most likely need to re-terminate the wires with the necessary ring terminal to connect the Derale controller, but he is correct in stating he used the original wires. I looked for the linked article with instructions referenced in the original post, but the link was dead.

If you're interested in my spare Derale 16795, let me know.

jrbetz

Thanks for the info and offer. Yes, I believe I would be interested in your spare Derale, if we’re sure it’s the one I need. I am sorry, I am rather clueless with this and learning along the way! With that not using the existing plugs, I guess my main concern would then be if there’s any instructions out there to help me wire it in correctly. I’d obviously prefer not to go cutting wires without knowing what I am doing. Let me know what you want for that controller and how I can get to you privately. Thanks again.
I’m

76FJ55

EDIT:
Was doing to send you a PM with my direct contact info, but it doesn't appear to be an option.

you can email me directly at sdirnberger @ hotmail.