black when i spep on break but running lights work fine till i press break and again all lights on drivers rear go out

main parking brake cable broken - how do I replace it

struts to hold up rear hatch

holds up rear hatch

I used an air compressor to get any moisture out of boot and spark plugs. didn't seem to help. could I need new spark plugs?

I can hear a hissing sound in the engine compartment that sounds like a vacuum leak resulting in rough idle. The engine smooths out at highway speeds (75 mph) How do I access vacuum hoses?

How do I bench test the coils?

brake light switch? The ASR light coming on causes the car to go on limp mode.