Hello all. I'm hoping for a little help here. I have a 1995 Olds Silhouette. This is the year they were transitioning OBD ports from OBD1 to OBD2. I am aware of the paper clip trick on OBD1 ports to read trouble codes by shorting the "A" and "B" terminals, but mine is different. I have no lead going to the "B" terminal. My OBD plug only has three wires going to it, and one of them is not to the "B" terminal. I have been to every auto parts store and two mechanics now...nobody can figure out how to read the trouble codes with this specific plug. Anybody have a similar experience? Is there any way for me to pull the codes without paying a dealership $100 to do it?

Thank you all in advance.

Cliff

 

 

Your OBD 1.5 system does not have the diagnostic terminal that lets you jumper the terminals. The only way to read this is with a scan tool that is specifically compatible with OBD 1.5.

http://www.imhdd.ms11.net/OLDS/obd.html

 

This should be the three wires in your ALDL connector.

 

Have a '95 Firebird and have had no luck at all trying to retrieve codes. Has the OBD 2 connector and has OBD 1 wiring.

 

Chevy and related cars (like the F-body) used the 16-pin OBD2 connector for these transition cars. Olds and Buick used the 12-pin OBD1 connector. There are a limited number of scan tools that can read them. Most vendors, especially those selling the low-end scan tools, don't bother to support this limited market.