relay with negative output and time delay

Hi, I've been looking over the forums for a quite a while and finally decided to make an account since I have a question of my own. I was looking to wire up a circuit that will take a positive constant output and send a negative output then stop, short pause and send a second negative constant output. Not to sure on where to start, but I'm thinking I will need 2-3 relays and probably capacitors and resistors somewhere also. Thanks!

Maybe a couple of DEI 528T relay modules?

"positive constant output and send a negative output then stop," Could explain the circuit or what it means, OR do you mean constant input?

Yes - I was wondering that. I assume it's a rising constant that is the trigger, and I wondered what initial negative period (0V aka GND; off) was required - maybe an RC "differentiator" circuit into a 528T might do? But due to the lack of detail of both pulse durations etc, I thought the OP could work it out.

I think this is a case of we know the answer what exactly is the question?

I'm looking to bypass the new pioneer e-brake setup where you have to have it see ground then open circuit then see ground again. I don't want to do the easy way out and buy a module I'd rather try and do it myself, but I'm not too experienced with relays, diodes, and capacitors just yet.

The easy way is a 528t module, or you could assemble and build a Velleman kit with modifications. As a pro it's easier for me to use a 528t, it isn't cost effective to build something. There are timed circuits in the relay section but you would have to modify some of the components.