diagnostic diagnosis
 

ok. the car is 95 z28 and it is OBD1 with the OBD2 plug. since its obd1 can i still use the jumper wire to read codes? if so, which ports is A and B??

no. you need a scanner.

can i get away with a obd1 scanner or does it have to be obd2?? i found a few articles that say i can jump wire the obd1.

your supposed to be able to make a adaptor using a obd1. i still cant figure out why my scanner wouldnt work. lol. i guess the 95 is different from the 94.

hey crab does your cig lighter work?

94 is OBDI with OBDI connector. The 95 is still OBDI but with a OBDII connector. You will have to use a OBDI scanner with a an OBDII connector adapter. You can't flash the codes, no matter how hard you try.

yes but i was trying to scann wes's car. dont know if his lighter is working.
pete i thought 93 was obd1 and 94-95 were the 1.5 or obd 1 with the obd2 plug. according to the instructions my scanner will scan both 1 and 2 and will do a 93 or 94 but not 95. it scanns my od2 97 gmc 1ton.

oh ok cuz the lighter and scanner run off the same fuse and their power source routes together

The 93 still used the old OBDI ECM (MEMCAL chip) which did not control the transmission, and the trouble codes could be flashed. Early 94s were OBDI but used flash memory and also controlled the transmission, later ones were OBD1.5. Both of the newer versions could not flash trouble codes. Looks like GM ran out of OBDI connectors in late 94 and didn't want to make more so they used OBDII connectors instead. lol

that sucks for me then don't it.... if craby's scanner didn't work for my car, how do i go about getting the stored codes???