delay relay

Hello, I am going to install front parking sensors and I going to connect them with brake lights.When I press the brake they activate.What I want is a relay that when I release the brake pedal the parking sensors stay on for approximately 30 seconds not switch off. Can you please help me with this?I found this relay       DEI 611T Mosfet Multi-switch, but I am not sure if this is for what I want the relay to.

That's the one or a DEI 528t. But they will both activate as soon as you press the brake switch. You're better off linking the front sensors to a speed control device, e.g. Sailes Marketing UK

thanks allot for your reply,I saw the manual,and I can't understand how it has to be connected. red   +12v green activation input, (+12v I think from the brabe switch) black -12v and how the yellow and brown be connected?I think they must be connected to positive and negative of the parking sensors to be switched on? or I am wrong? thanks in advance

You have the instructions, read carefully.

Today I tried to connect the DEI 611T,I can't understand what I am doing wrong. red   +12v green activation input, from 12v supply black -12v But I don't have any current at the brown and yellow. When feed the brown wire with +12v at the yellow one I have constant +12v so the parking brakes will be always on I put the 1 and 3 from the module on the on position I can't understand what I'm doing wrong I think it simple as that. I hope this is not a china rubbish and if it works only for few minutes.

1 ON 2 OFF 3 ON 4 OFF Brown 12V+ constant Thought, try turning the timer adjustment down, then work up. You've set it up correctly.

thanks I think the relay is not working properly because when I connect the brown with the +12v I always have +12v at the yellow not when I activate the module so for me is useless