how to scan obd1

[84slow]

So when I first picked up my cutlass it had a service engine soon light. I took the bulb out cause she still runs like a Cadillac.. so I tried today crossing the 2 top right pins with electrical wire,paper clip,big flat head screwdriver. And I get no code flashes and yes I put the bulb back in to test. No flash's. I know on newer GM's the cigarette lighter fuse controls the obd 2 power so I checked mine fuses just Incase but they look fine.

Cars a 84 cutlass 3.8l if it helps

 

[pontiacgp]

connect terminals A and B of the diagnostic connector and turn your ignition key on with engine off and the codes should start to blink

 

[84slow]

connect terminals A and B of the diagnostic connector and turn your ignition key on with engine off and the codes should start to blink

I've done that. But starting to think there's a issue with cluster cause seat belt light doesn't even come on or choke light

 

[pontiacgp]

check the fuses

 

[pagrunt]

Do you have gauges and they quit working since the SES light came on? I had a simular issue back on the '90's. Mine came on & lost my gauges. Kept blowing the gauge fuse (circuit 39.) I checked everything, gauges, conections, wires, ground points, then the computer. The computer is tied into that circuit, I yanked the computer & bulb, everything worked fine & quit blowing fuses. I had something short out in the computer that kept blowing the circuit. I still passed emmisions & the guys at the Pep Boys I worked at even used it to pass a few newer cars.

 

[84slow]

The gauges still work like speedo and gas and illumination light still works. But I will check out the fuses again tomorow cause no door ajar or anything like choke seat belt light lights up and low fuel

 

[drogg1]

Hmm curious. Never know what the previous owner did. If it's not a fuse, I would guess it's something in the cluster. Could be hard to diagnose it's its something with the ECM other than the fuse.

http://www.maliburacing.com/wiring.html