When it is disconnected it puts the electronic timing control module in limp mode,and then you can set the timing with a timing light.
your truck does not have a bypass connector
Look under the dash for a single wire connector right side under the glove box.
look under carpet on pass side under dash single wire horizontally
That year does not have 1. The timing is computer controlled and you MUST have an engine scanner to set the timing on that engine. A timing light will not work.
the bypass connector is located on the engine wire harness, next to the left valve cover (watching engine front) next to the air injection control valve.
disconnect the tan wire connector on the passenger side wiring harness , that puts it in bypass mode, unlock dist. bolt and adjust timing. when set reconnect wiring connector.
That year did not have one because the timing is computer controlled and can be only adjusted with a Engine SCANNER.
Where is the timing connector on a 1995 gmc sonoma
On GM trucks, you need to look under the glove compartment for the wiring harness. look for a single wire with a brown tracer that has a black connector. This is the electronic timing connector. Start the truck, unplug connector, set the distributor timing at zero, tighten distributor, reconnect wire.
The wire in question is not called a reset but a "Bypass Wire" . It is a single wire with a quick disconnect found right next to the main harness entering the computer module . The bypass wire is used when setting the base ignition timing to 0* . You will not be able to properly set timing with the control wire connected .
The timing connector is in the pasenger side under the carpet shuld be a brown cable
ground the diagnostic connector under the dash , set the timing , then unplug connector