Wiring diagram for LED warning light on switch (1 Viewer)

[Lizbiebrowne]

I’ve an outdoor light above the habitation door on my Hymer that I keep leaving on. So I thought I’d fit an LED to the switch that lit up when the light was on. Except I don’t know how to do that - could someone help?

 

[oldiesontour]

The warning light will be wired from the switch (same contact that goes to the light...will only be live when the switch is on.....the other wire on the switch will always be live) and neutral (van chassis) the other way is to swop the switch for one that has a built in light (it will have the same 2 wires as the original and a negative...van chassis.

 

[namwaldog]

If you can't find the switch you are looking for, you could think along the lines of one of these.....

4X 8mm 12V LED Indicator Light Car Boat Dash Dashboard Panel Warning Pilot Lamp | eBay

As you wanted, this LED indicator light bulb also very suitable for van and other universal vehicles. Shining super bright light, play an important part in warning and indication. 4 x Car LED Indicator Light Bulbs.

www.ebay.co.uk

Fit on the inside of the MH as near as you can to the Awning light, thread the cables through and attach to positive and earth of the light fitting.

 

[Jev88]

Replace switch (12V) with a switch with an led ?

 

[pappajohn]

Trace the two wires at the porch light.
One will be positive, switched on and off from the light switch, the other is negative.
Wire the led between the pos and neg wires AFTER the switch (between switch and light)
If the led doesn't light try swapping the two wires around.... The led may be polarised, meaning it only works on way round.

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[Lizbiebrowne]

Replace switch (12V) with a switch with an led ?

View attachment 922726

The switch is part of a double switch so I'd prefer to keep using it if possible. Thanks for the suggestion.

 

[Jev88]

The switch is part of a double switch so I'd prefer to keep using it if possible. Thanks for the suggestion.

Show me the switch?

 

[Lenny HB]

One of my previous vans I fitted a 2mm LED in the switch, you need a resistor in series to limit the current to the LED a 1.2k resistor will limit the current to 10ma which is about right for most standard LED's. Hardest part of the job was finding a neutral connection.

 

[Dickyb]

We used to have the same issue when letting the dog out for her last toilet, I now leave the habitation door blind down a crack, the wife then tells me I’ve left the light on, so I have more of an audible warning than a visual one

 

[Lizbiebrowne]

One of my previous vans I fitted a 2mm LED in the switch, you need a resistor in series to limit the current to the LED a 1.2k resistor will limit the current to 10ma which is about right for most standard LED's. Hardest part of the job was finding a neutral connection.

Thanks, I can find a neutral and I have a resistor so I'll give that a go.

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[Lizbiebrowne]

We used to have the same issue when letting the dog out for her last toilet, I now leave the habitation door blind down a crack, the wife then tells me I’ve left the light on, so I have more of an audible warning than a visual one

Snap! That's exactly the scenario that leads to the light being left on. But no window in the habitation door unfortunately.

 

[autorouter]

As Lenny HB says, a standard LED requires about 3V, so you need a resistor in series with it to drop the voltage from 12V to 3V. However for those that don't want to faff about with a soldering iron, you can get an LED with a resistor prewired into its leads. Lots of options, google '12V LED indicator'.

Red 8mm Pilot Indicator light 12V

Chrome panel mount LED indicator with a colour diffused lens suitable for general DC applications.Colour: RedInput voltage: 12VDCPanel cut-out: 8mmForward current: 20mAIncludes mounting nutDimensions: 35.9 x 10mm (Height x Diameter)

www.switchelectronics.co.uk

 

[Lenny HB]

Only problem with those is size, I used a 2mm LED and mounted it in the centre of the switch, may not be possible depends on the switch.

 

[Lizbiebrowne]

Show me the switch?

Here’s the setup. I'd rather work with what I have than try another switch.

As Lenny HB says, a standard LED requires about 3V, so you need a resistor in series with it to drop the voltage from 12V to 3V. However for those that don't want to faff about with a soldering iron, you can get an LED with a resistor prewired into its leads. Lots of options, google '12V LED indicator'.

Red 8mm Pilot Indicator light 12V

Chrome panel mount LED indicator with a colour diffused lens suitable for general DC applications.Colour: RedInput voltage: 12VDCPanel cut-out: 8mmForward current: 20mAIncludes mounting nutDimensions: 35.9 x 10mm (Height x Diameter)

www.switchelectronics.co.uk

Only problem with those is size, I used a 2mm LED and mounted it in the centre of the switch, may not be possible depends on the switch.

View attachment 922847

I'd like to fit the LED in the bezel if I can. Not much room there though and it's going to need a neat hole to look OK as the LED I have will push in from the back and any imperfections will show. Unless I can find a small LED that I can fit from the front.

 

[Lizbiebrowne]

All done and I think it looks quite neat. Thanks everyone for your help.

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[Kannon Fodda]

I'm going to have to try and adapt this for my shower/toilet light which I always leave on.

 

[Manic]

I fitted a small led to my Hymer awning light for the same reason, drilled a small hole in control panel and glued a led in wired into awning light wire.
EBay

 

[Lizbiebrowne]

My LED's held in place with a small o-ring - hide the imperfect drill hole as well.

 

[ivorantony]

I'm going to have to try and adapt this for my shower/toilet light which I always leave on.

Better to use a PIR with timer built in, no fumbling for a switch in the dark,