I had to draw it on paper.
It’s just a simple representation of the fan low circuit with the blocking diode in place.
The only drawback is that you would need ~50 amp diode in there.
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| Author: | PZKW108 [ Sun Apr 29, 2018 10:48 pm ] |
| Post subject: | Electric fan indicator light |
What would be the best way to wire a indicator light to the electric fan to let me know the fan is actually on ? That would makes the adjustment of the fan controller temperature a lot easier !!! Thanks |
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| Author: | GordnadoCRD [ Sun Apr 29, 2018 11:13 pm ] |
| Post subject: | Re: Electric fan indicator light |
if it's temporary, just run a small speaker wire pair from the driver area around and through the A pillar / door seal area, and out through the engine compartment and up to the fan. Terminate one to ground, and the other with a "bed of nails" clip to the fan power wire. put whatever kind of 12v light you want in the driver's area end to signal you. Easy to use, and painless to remove when you're done. Can be used for many other things in a similar way. |
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| Author: | PZKW108 [ Mon Apr 30, 2018 1:13 am ] |
| Post subject: | Re: Electric fan indicator light |
Thanks , its an quick and easy way to do it as an temporary set up for setting up temp . But I was thinking of a permanent one with a led , so I guess the question would be : what resistor should I put with the led ?? and serie or parallel ? |
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| Author: | GordnadoCRD [ Mon Apr 30, 2018 2:29 am ] |
| Post subject: | Re: Electric fan indicator light |
definitely parallel. I would shop for something on Ebay or Amazon or a local electronics store, that already has it's own voltage regulation. |
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| Author: | PZKW108 [ Mon Apr 30, 2018 3:19 pm ] |
| Post subject: | Re: Electric fan indicator light |
Thx Gord I found some nice one on E-bay with a little fan sign. |
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| Author: | PZKW108 [ Sun May 06, 2018 6:56 pm ] |
| Post subject: | Re: Electric fan indicator light |
I coudn't wait for the E-bay shipping so I bought one at my local speedshop. It's from painless. it works really good , the only thing is a highway speed the fan turning from the wing generate enough current to turn on the led........ other than that it works great !!!!! |
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| Author: | GordnadoCRD [ Sun May 06, 2018 8:29 pm ] |
| Post subject: | Re: Electric fan indicator light |
That could be a good thing! Now you have an indicator light for when the radiator gets enough bugs to inhibit air flow enough to no longer spin the fan. Time to pressure wash the cooling stack. |
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| Author: | Sir Sam [ Tue May 08, 2018 6:42 pm ] |
| Post subject: | Re: Electric fan indicator light |
PZKW108 wrote: I coudn't wait for the E-bay shipping so I bought one at my local speedshop. It's from painless. it works really good , the only thing is a highway speed the fan turning from the wing generate enough current to turn on the led........ other than that it works great !!!!! Add a resistor? |
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| Author: | flash7210 [ Tue May 08, 2018 9:04 pm ] |
| Post subject: | Re: Electric fan indicator light |
Sir Sam wrote: PZKW108 wrote: I coudn't wait for the E-bay shipping so I bought one at my local speedshop. It's from painless. it works really good , the only thing is a highway speed the fan turning from the wing generate enough current to turn on the led........ other than that it works great !!!!! Add a resistor? A resistor might work. But a blocking diode on the + side of the fan circuit, between the fan motor and LED, will definitely fix it. |
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| Author: | Sir Sam [ Tue May 08, 2018 10:46 pm ] |
| Post subject: | Re: Electric fan indicator light |
flash7210 wrote: Sir Sam wrote: PZKW108 wrote: I coudn't wait for the E-bay shipping so I bought one at my local speedshop. It's from painless. it works really good , the only thing is a highway speed the fan turning from the wing generate enough current to turn on the led........ other than that it works great !!!!! Add a resistor? A resistor might work. But a blocking diode on the + side of the fan circuit, between the fan motor and LED, will definitely fix it. I'm having a hard time with this one, wont that also block flow when the motor is on? |
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| Author: | flash7210 [ Wed May 09, 2018 12:24 pm ] |
| Post subject: | Re: Electric fan indicator light |
I had to draw it on paper. It’s just a simple representation of the fan low circuit with the blocking diode in place. The only drawback is that you would need ~50 amp diode in there. |
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| Author: | Sir Sam [ Wed May 09, 2018 6:33 pm ] |
| Post subject: | Re: Electric fan indicator light |
flash7210 wrote: I had to draw it on paper. It’s just a simple representation of the fan low circuit with the blocking diode in place. The only drawback is that you would need ~50 amp diode in there. Ah understand what you mean now. Only problem is getting a diode that can handle the amps the fan pulls, thats probably not easy. |
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| Author: | GordnadoCRD [ Wed May 09, 2018 8:05 pm ] |
| Post subject: | Re: Electric fan indicator light |
I suppose one could make a diode bridge with heat sink, such as found in old alternators. Mounting it insulated would be the hardest part. |
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| Author: | Sir Sam [ Wed May 09, 2018 9:06 pm ] |
| Post subject: | Re: Electric fan indicator light |
GordnadoCRD wrote: I suppose one could make a diode bridge with heat sink, such as found in old alternators. Mounting it insulated would be the hardest part. Or move the LED to the trigger circuit, though that would only show if the fan was commanded on, not if it was actually running. Or have the trigger circuit trigger a transisitor(or relay) that then allows the fan power to turn the LED on. This way the fan has to be running and the command on for the light to light. That said, why was this really needed? |
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| Author: | flash7210 [ Wed May 09, 2018 9:46 pm ] |
| Post subject: | Re: Electric fan indicator light |
Actually, a 50 amp bridge rectifier could be used. It’s just a cluster of diodes. Just clip off the AC leads and only use the + and - leads. Very easy to find a 50 amp rectifier. |
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| Author: | Mountainman [ Thu May 10, 2018 12:31 am ] |
| Post subject: | Re: Electric fan indicator light |
Or use the controller that thermorex and I use which has the pin outs for on indication. About $100 at summit racing. Expensive fix I know, but it's the best fan controller I've ever used. I'm wiring up an on indicator myself |
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