Slight problem with popups And fuel pump

[Evarus]

ok well just got myself a nice black s12 and doing some welding to the sills atm engine needs to be changed but i have a rebuilt ca18et sitting in a friends garrage that i might put in for the time being but will eventualy have a ca18det or a sr20det in once i have saved a few coins.
Anyhow the lights go up just fine and they sometimes go down, I have changed the relay that i thought was the problem but still no luck. Just cant seem to work out whats wrong with it as it seems just random as to when it works.
Also my fuel pump is NUTS the thing just wont turn off. When i turn the ignition on the fuel pump starts and just stays on all the time and basicaly makes the engine pop and fart alot lol if anyone can tell me how to fix this i would be very happy.

Thanks