fan light

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snakepete
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fan light

Post by snakepete »

Hi lads and lasses
I need some help.could some one tell me how to wire a dash light for the electric fan iv fitted to my robin trike.
Iv tried it with a 30a relay running from the rad thermostat switch to the live relay (86) and the earth to the other side of the relay(85),the light running from the other side of the relay.(30) with a live to (87) and light earthed.
If I wire it up strait from the battery it works But from the thermostat i does not.what am i doing wrong
help.
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1130cc
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Re: fan light

Post by 1130cc »

You do not need a relay for the light. I am assuming it is just so you know the fan is on.

The rad thermostat is either completing a live circuit, or a negative.
All you need to do is put your light in series (in line) with the cable going to the fan.
IE thermostat -> Light -> Fan.
So, when the circuit completes, to power the fan, it will power the light too.
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snakepete
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Re: fan light

Post by snakepete »

Thanks 1130cc just finished it and it works great thanks again.
Kawazuki
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Re: fan light

Post by Kawazuki »

1130cc wrote: Fri May 25, 2018 6:02 pm You do not need a relay for the light. I am assuming it is just so you know the fan is on.

The rad thermostat is either completing a live circuit, or a negative.
All you need to do is put your light in series (in line) with the cable going to the fan.
IE thermostat -> Light -> Fan.
So, when the circuit completes, to power the fan, it will power the light too.
Not good idea putting a light bulb in series in a fan line - fans draw lots of amps to start and could pop a light bulb after a few cycles = no light and no fan either! Best to run it wired parallel!
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1130cc
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Re: fan light

Post by 1130cc »

Kawazuki wrote: Sat May 26, 2018 10:14 amNot good idea putting a light bulb in series in a fan line - fans draw lots of amps to start and could pop a light bulb after a few cycles = no light and no fan either! Best to run it wired parallel!
Good point. That would be a better solution.
Bikers know why dogs stick their head out of car windows.
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knockdolian
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Re: fan light

Post by knockdolian »

The light just needs to be in parallel with the fan. Neg to Neg and live to live.
That’s it .
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swirl
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Re: fan light

Post by swirl »

:worthless:
knockdolian wrote: Sun Jul 01, 2018 7:27 pm The light just needs to be in parallel with the fan. Neg to Neg and live to live.
That’s it .
As said parallel across the fan
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