ive got a 99 integra. a while back i had to swap out the trunk lid because of an accident, and ever since then my light on the dashboard lights up saying the trunk is open. it obviously isnt, but i guess im missing a sensor that tells the dash to turn the light off. the problem is, ive got the stock security system on my car, and i cant arm it because the car thinks the trunk is open. so i have to lock it the old fashioned way, through the door. my question is, is there any way i can disconnect a cable or something, so that the light turns off, so the car thinks the trunk is closed, and i can arm my system?

 

There is a pinswitch on either the door or the doorjamb. Find the switch and press it, see if you can arm it then. If you can't, you can either get a new switch, make sure the old one is actually connected, or bypass the switch altogether. If you want to bypass it, you should be able to just disconnect it. I think the switches complete the circuit when the door is open, I don't remember though.
If it works when you manually press it, the switch might need to be adjusted, or the hatch might not be lined up properly. The dome light should work like normal if the switch is working..

 

it's okay no one's gunna break into your car.