IIRC, one goes to the defrost and heat actuator, one goes to the EGR control valve, one to fuel rail/regulator. there is a vacuum line or 2 on the air cleaner. I had a 93 so might be a bit different. should be a sticker for vacuum system on hood. could be one to vapor canister as well. if your heat/ac is blowing out of defrost and floor no matter what setting then there is a leak or missing line to that hose. there is a bigger one that goes to the brake cylinder as well, but I believe that comes off the intake but not 100% sure. find a manual to help. good luck