Switched Voltage Reducer - Paging Scottyb

[Rodie]

I'm hoping someone smarter than I can check my work before I begin this install. Here are the details:

• 2007 Yamaha Drive/Electric 48V (4x12V)
• 48V->12V Reducer that does not have a switched wire (always on)
• Bank of four switches (see picture)
• Potter & Brumfield T9Ap1D52 Relay

Basically, I want to use one of the four switches to turn the reducer (and everything attached to it) on and off all at once. The other three switches would be to control the three 12V accessories at the end of the reducer on and off individually (lights, radio, and voltmeter.)

I attached an image of what I perceive to be the correct wiring for this but am looking for someone (scottyb?) to confirm I'm on the right track or set me straight before I go much further. Some of my specific concerns:

• Most using the relay are connecting to the cart's ignition switch (to switch on and off the relay) which I believe would be 48V. I would like to hook that end of it to 12V so I don't burn up my cheaper switch (don't ask me how I know the switch can't take 48V!) My impression is that you can use about any voltage on this end to switch the relay. Is that the case? Obviously, the other connections that are actually passing the power through would be 48V.
• You'll notice I am coming off one battery for 12V (before switch 1) and the last battery for 48V (to the relay) but I have everything sharing the same ground. Can I share the same ground for both the 12V and 48V traffic?
• Anything else look amiss?

Here are the images -- THANKS in advance. This community is great.

[Mrtosh]

Originally Posted by Rodie

I'm hoping someone smarter than I can check my work before I begin this install. Here are the details:

• 2007 Yamaha Drive/Electric 48V (4x12V)
• 48V->12V Reducer that does not have a switched wire (always on)
• Bank of four switches (see picture)
• Potter & Brumfield T9Ap1D52 Relay

Basically, I want to use one of the four switches to turn the reducer (and everything attached to it) on and off all at once. The other three switches would be to control the three 12V accessories at the end of the reducer on and off individually (lights, radio, and voltmeter.)

I attached an image of what I perceive to be the correct wiring for this but am looking for someone (scottyb?) to confirm I'm on the right track or set me straight before I go much further. Some of my specific concerns:

• Most using the relay are connecting to the cart's ignition switch (to switch on and off the relay) which I believe would be 48V. I would like to hook that end of it to 12V so I don't burn up my cheaper switch (don't ask me how I know the switch can't take 48V!) My impression is that you can use about any voltage on this end to switch the relay. Is that the case? Obviously, the other connections that are actually passing the power through would be 48V.
• You'll notice I am coming off one battery for 12V (before switch 1) and the last battery for 48V (to the relay) but I have everything sharing the same ground. Can I share the same ground for both the 12V and 48V traffic?
• Anything else look amiss?

Here are the images -- THANKS in advance. This community is great.

Did you end up going this route? Thanks in advance.