Diodes question
 

Does anyone have a schematic or know which diodes to use when the trim pumps are hooked together, but I want them to work independently?

If you are triggering the relays only, any in line diode rated for .5 amp or so would be plenty.

https://www.marineindustrieswest.com/ProductDetails.cfm?group_id=2&catid=16&productid=4 009
https://www.marineindustrieswest.com/installation/Twin_Diode.pdf
https://cimg7.ibsrv.net/gimg/www.off...700e95bdaa.jpg

"This diode kit allows the usage of one trim switch to control two 12V operations. Commonly used for single trim switches to control two outdrives or two trim tabs with Oildyne trim pumps"

If i`m reading that right one switch controls 2 pumps.
I`m looking to control each pump seperately with a switch..

I think thats probably not possible.

so you want 3 trim switches?

What switches are you going have?? I have 3 momentary dash switches (port/both/starb) and 1 switch on my throttle to control both. It can be done with 2 switches in your throttles also.

You looking to use one switch with two pumps?
or each pump on its own switch?
or a combo of both?

Lets see if I can explain this.
The bluetooth wireless box had 4 relays 2 green for down, 2 blue for up. That controls both pump at the same time with 2 buttons, one up one down.
I burned out 2 of the 4 relays in the Bluetooth box because I`m a dumbass and hooked it up to the trim pump load instead of the relay.

I thought I could outsmart it by using 2 relays but that required to hook both pumps together.
So the remote bluetooth switches work fine, push one button, both trim pumps work at the same time.
However what I didn`t think about is now that that both pumps are hooked together my 2 switches that control the pumps individually no longer do.. press port or startboard and they should work indiviadually but now they also work at the same time. So I have no individual control of my trim .

CP says send back box and well put a new board in it .. I`ll just do that . I tried to outsmart the box and I outsmarted myself.

I thought if I could just put a diode somewhere I could avoid the rewire and shipping etc.


https://cimg6.ibsrv.net/gimg/www.off...809f85b156.jpg
https://cimg7.ibsrv.net/gimg/www.off...e4b596380e.jpg
https://cimg8.ibsrv.net/gimg/www.off...f1876fb054.jpg

You can do what your thinking.....assuming i'm awake enough to understand what you wrote i drew this up for you. You would need 4 diodes....take the output from the Bluetooth module and split each line into two legs. So the up trigger gets split two ways and the down trigger gets split two ways...then on each leg install a diode. the silver band on the diode would be closest to the trim tab motor and farthest away from the Bluetooth module on each leg. This way they act like one way valves. So the voltage and current will pass out of the voltage module and trigger the pumps...but when you hit your dash switches it wont back feed the other circuits. Pay not attention to the diode bands in the drawing...i just did that quickly.... :)
https://cimg0.ibsrv.net/gimg/www.off...a876936295.jpg

Wally,
the drawing is right but your bands are wrong.

At least on my phone after a couple beer

EDIT:

Wally is correct.

same thing I do for both switches on throttle and individual on dash.