ALDL 12-pin USB Cable These 9-pin RS-232 serial cables

These 9-pin RS-232 serial cables can be used to increase the distance between the OBD2 All-In-One unit and your computer or laptop

Rotating the locking ring when connected assures that the connector cannot come unplugged accidentally

and 4b Controllers

ECM555 0707

You have nothing to lose by trying MEFI Scan first

ALDL 12-pin USB Cable These 9-pin RS-232 serial cablesThis cable has a 12 pin OBD1 connector shell to plug in under your cars dash to interface to your cars ECM. This cable is the most convenient to use if your car is equipped with the 12 pin connector style, as it allows you to just feel under the dash to plug it in. See our GM OBD1 home page for references and diagrams of the connectors styles. This cable works on cars that have the serial data pin on pin M or pin E of the GM 12 pin OBD1 ALDL