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Gjac wrote:
Joe you have OBDI. If Google search Chevy ODB I eng service codes you will get generic codes. To retrieve codes you jumper A&B terminals with a paper clip and the eng service light on the dash will flash. If you see one long flash and two short flashes that would be code 12 and that means every thing is normal. If you see one long flash and 3 or more short flashes you have a problem. Is you service eng light on now?

And let me add it will flash each code 3 times then the next code, then end in 12. write these down in order and fix the last one and clear the rest and try running again to see what comes back. Some codes create other symtoms. If yours is like the diesels check all you ground connections the electronics share this. They can cause random electrical gremlins if they are getting corroded or crusty. A little wire or brass brush and some diectric greese can do wonders. a little electrical contact cleaner sprayed into weather pac connectors helps too.

Joe you have OBDI. If Google search Chevy ODB I eng service codes you will get generic codes. To retrieve codes you jumper A&B terminals with a paper clip and the eng service light on the dash will flash. If you see one long flash and two short flashes that would be code 12 and that means every thing is normal. If you see one long flash and 3 or more short flashes you have a problem. Is you service eng light on now?

O'Reilly Auto Parts has code readers that will read some OBD1 vehicles.

Left side of the steering wheel just below the dash.
Not many places have OBD I readers. I have to jumper two pins on the connector then read the flashes on the engine check light.

OBD II was standardized in 1996, everything built onward has OBDII. Everything (with just a couple exceptions) before 1994 is OBD I.

The location should be below the dash and somewhere adjacent to the driver's position. I've seen them hidden by plastic flaps and also positioned above the transmission hump. Most are to the left of the driver's position as this makes logistical sense for wiring location in most vehicles.

OBD readers are available at any autoparts store.

Some earlier GM vehicles had a code sequence port, don't know if it applies to your coach, probably not.

liborko wrote:
Some code readers will tell you that; mine does.

What kind of code readers and where would i plug it?

dons2346 wrote:
Based on the info you gave us, the obd is right there.

On a serious note, it would help if you listed the info about your coach such as make, model, year, engine, etc.

It is a 92 chevy p30 454 big block tbi injected.I can see a silver box underneath the steering colume and i think this is it.It is inside the cab.

Based on the info you gave us, the obd is right there.

On a serious note, it would help if you listed the info about your coach such as make, model, year, engine, etc.

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