Where is the diagnostic plug to get codes from check engine light
The 1990 Isuzu Trooper with a 2.8L GM engine, the diagnostic connector is located directly beneath the coin try in the front of your center console!!
Along with the typical OBD connector is two wires with a spade connector on each, one female and one male. Connect the two wires to display the diagnostic codes on your check engine lamp on the instrument cluster panel.
As for finding out your codes meanings, go to your nearest public library and locate a 1990 Trooper service manual.
×