Howdy. And Merry Christmas in advance.

I'd like opinions as to whether or not some diodes would be needed. Please see diagram.

The +12 V on the right switch (SPDT) is from a forthcoming extra battery isolated from starter battery.
The rest is plumbed into the standard 2nd gen (spec 94-95) 4runner. I am adding a second "rear" light. But it is over the back of rear seat rather than front seats.
And it will operate normally with the door if I so choose. But if maybe camping or something I can flip it on by the switch (which will be mounted in the driver side rear area panel).

I just cant decide if I need to add any of the diodes depicted.

 

I can't see why you would need diodes. Why did you think you might?

[The diode D10 used with power windows is to allow the door lock relay to sense the left and right doors independently. You don't care about that here.]

 

Thanks for the reply Mr Scope.

I wasn't really sure if needed or not. Sorta thot might be needed to prevent 'backwards' V lighting the (frontmost) "Rear" light. Or maybe powering up back towards the original fuse. I only want my rear switch to power on the added lamp. Didn't really see any danger of the OE battery trying to charge my spare 'campin' battery either. Altho did think about it.

OTOH since I had the 'rona in Nov I question a lot of my decisions!
Merry Christmas my friend.