[motty]

I have the same year s-10 blazer and had the same problems. First I would put a jumper wire from the positive battery to the pin leading to the fuel pump. Have someone listen for the pump to kick on. If ti does kick on you prolly have a break in the wire leading to the relay, or a bad relay. I ended up finding a break in the wire going to the relay to tell it to turn on. I think it was a small blue wire and it was broke under the brake booster. Hope that helps Ive had alot of problems with the wireing on that thing.