the wire is under the dash next to the ecm on the passenger side
there is a timing connector, this is usually a tan wire with a black tracer..it is usually located under the carpeting close to the heater cox on the passenger side of the truck
Yes, that is the one you unplug.
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.
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 .
I just set my timing and the plug on my 1994 full size Chevy Blazer (same as a full size pick up) was directly under the glove compartment. It was one wire (tan with black stripe) and two ends of a plug together just unplug and set timing.
Look under the dash for a single wire connector right side under the glove box.
Put your timing light on the number one spark plug wire and then remove the vacuum advance hose, loosen the distributor bolt and with the engine idling move the dist. unti, you get the timing mark on the crank to come to the correct notch on the timing guage.
How do you wire a Pigtail for a Fuel Pump on a 97 Chevy Blazer Thank You EVa
NO there is not. The timing on that engine is computer controlled and it REQUIRES an engine scanner to set the timing. A timing light will not work.
you have to undo a single wire plug under the carpet on the pasenger side. then the computer is in sleep mode. Set at 0 degrees, then shut off, reconnect the plug and start,,,, it will automatically adjust itself.
Make sure the ECM is in field bypass mode (disconnect the tan wire in the passenger compartment) and set the timing at 0 TDC.
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.