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M.L. Toys
KidsWheels
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Gruber
KidsWheels
Need new batteries? Going from 12V to 18V or 6V to 12V? Wiring Questions?
By ajg72
#147711
Can someone tell me how to add a horn to power wheel to a switch and to a separate battery with a relay too. What wires go where in details.


User avatar
By chart2006
#147713
Are you looking at wiring to an existing switch or adding a new switch. My suggestion is just add a new switch. With a horn you don't necessarily need a relay as a momentary SPST switch will work fine as long as the switch has a higher current rating than the horn. The only reason to add a relay is to control the high current associated with some horns with a small switch that can't handle high current. Based on a 12V battery source here's my recommendation for getting away from a relay:

Here's a basic switch circuit example. The light would be replaced by the horn. Direction of the SPST switch leads make do difference so just wire them up however rule of thumb is to place the switch off the negative side of the battery - between the battery's negative lead and the horn. By the looks of it the horn may not make a difference on its polarity either but if you do get it make sure. Total cost probably less than $20

Image

Switch:
https://www.amazon.com/Ulincos-Momentar ... ton+switch

Horn:
https://www.amazon.com/uxcell-Universal ... s=12v+horn

Now if you absolutely want to add in a relay with a high current horn then here's the wiring diagram for one - you'll still want to use a momentary SPST switch. In terms of the diagram here just disregard the solenoid. Also the second lead of the horn would go to ground which isn't shown here.
Image

If you're looking at reusing an existing switch in the PW's we need to know more about the switch and it's purpose - maybe even a photo. Is the switch a momentary switch? Is it a SPST, SPDT, DPDT, etc? Also I need clarification on the separate battery concept. Are you trying to us an existing switch (which means it has its own load and power source) to also drive a horn from a different power source? If the switch is a DPDT this would be easy but before I determine the circuit let me know if that's what you're trying to do?
User avatar
By chart2006
#147724
When it comes to the switch and horn they don’t have polarity so there is no negative or positive so don’t worry about which terminal to connect just pick one. As for the relay there’s wiring diagrams that show the relay wired differently and that would typically still be correct so it really boils down to just picking which way you want (they’re “pass-through” components). Just follow the diagram I drew up in the link below and you should be set.

Now the link you provided for the switch I was unable to see because it was a link do your order history of which I don’t have access to. As long as it’s a SPST or DPST momentary switch (it really needs to be momentary) you have nothing to worry about.

https://www.amazon.com/photos/share/zYo ... Dy0laMKQGi

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