Can someone please help with 12v timer switches?

[Ste663]

Can someone please help!

I have a 12v electric ball valve (3 wire) and a 12v 2 wire inflation pump which I am using for a project. I need the ball valve to open then close after 10 seconds and the inflation pump to run for 12 seconds simultaneously. I have managed to achieve this using 2x12v timer switches which I purchased off ebay (link below). The problem is I need a second button/switch to press that will deflate by opening the ball valve then close it 20 seconds after, I thought this would be achievable by introducing a third timer switch and a simple on/off/on switch, I wired the first two timer switches to the first 'on' then the single timer switch to the second switch but they all seem to interfere with each other and when I want to power the single one they all light up.

http://www.ebay.co.uk/itm/12V-DC-Multif ... 487d93317c


Hope someone can please help as I haven't got a clue when it comes to electrics or anything for that matter.

Regards

Ste663

[Richard]

This should not be too difficult to arrange. Please can you post a sketch of what you are thinking of as far as the air system is concerned - is the ball valve which is switched for inflation the one you want to use for deflation, or are you thinking of using a separate one?
Do you know if the output of the timer is a changeover one (i.e. an input wire is switched from one output to another depending on whether the relay is energised) or not?