I am afraid you are over simplifying the system. It's much more complicated than that. There is no single wire you can check to see if it's loose to find out why your check engine light is on. There are literally hundreds of different possibilities as to why a check engine light comes on. The computer's diagnostic connector that you may be thnking about, isn't even under the hood. It's under the driver's side dash panel, probably right under the steering column. It is a rectangular shaped connector with aproximately 10 pins. The main computer is in the dash. The wiring that connects to a vehicle's computer is massive. Literally hundreds of feet of wires. Possibly as many as a hundred or more inputs and outputs, including sensors, actuators, solenoids, power and ground inputs, fuel injector driver circuits, transmission control inputs and outputs, and more. If you raise the hood and see all those wires running everywhere all over the top of the engine, in and out of the firewall, down under the vehicle to the transmission, up and down the fender skirts, those are all wires connected to the main computer. So there is not one single wire, or group of wires, a person can point you to, to see if it's loose. The light itself is turned on and off by the computer. So if the light is on, the computer is turning it on for a reason. If a wire directly to the light is what you think might be loose, then likely the symptom would be that the light doesn't come on at all, so I seriously doubt that is the problem. That circuit would run directly from the computer to the light, and be entirely in the dash, and wouldn't be under the hood at all. There may, in fact, be a loose wire, or connector somewhere in the system. That may be what the computer sees wrong. But you will never find it without talking to the computer with a scan tool, and ask it what area of the system it sees a problem with. Just a side point. Notice I did not say "ask the computer what's wrong." That's because no vehicle computer or diagnostic computer can actually tell you what is wrong. That is a BIG misconception. The computer can only tell you what general area the problem may be in, or what the symptom is. The technician has to figure out what could be causing that symptom, and trace out the problem. Sometimes the problem is a loose wire, loose connector, failed sensor, failed actuator, and sometimes the problem may even be something not in the actual computer system, but a problem with the engine or transmission that causes the computer to not be able to properly do what it is trying to do. For example: If the computer is trying to adjust air/fuel mixture to get the oxygen sensors read corectly, but the piston rings are too badly worn, and your burning oil, and confusing the oxygen sensors, then the computer will turn on the light, and set an oxygen sensor code. But the oxygen sensors aren't actually the problem. The rings are. So a good technician needs to figure that out.
I have a 1999 GMC Suburban with the same problem but it did not show up until I had removed all of the wiring harness from the engine for a cylinder head job. I am going to look at the throttle position sensor and wiring connector tonight.
location and wiring of the horn relay
You can find the wiring diagram for a 1991 Suburban at various auto part stores. You can also check in the owner's manual.
If the motor is the same the wiring harness should fit. Only thing I would check is the sending units. As long as both vehicles have gauges or both have warning lights all should be fine.
need a picture
Xtreme 4x4 - 2001 Suburban Gorilla Part VII Wiring was released on: USA: June 2006
Right on top of engine, next to fuel injector or carb, on passenger side. Usually has a wiring harness coming off the top if it.
You can get a wiring diagram for a 2005 Chevrolet Suburban from a Chevrolet dealership. They will be able to print you off a copy of the diagram. Auto part stores may also be able to help you get a copy of the diagram.
It is bolted into the passenger side of the timing chain cover with 1 bolt. You will have to slide in under the front of the engine to see it. It will have an electric wiring connector plugged into it.
because it doesn't like you
autozone.com has alot of helpful info
No you have to disconnect the wiring under the dash.
Any good parts store will have a book on that car that contains all of the wiring diagrams for the whole car.
I have not found the wiring diagram for this engine yet. But I think I am close to get it. I already have the wiring diagram for the third generation engines. The YD25DDTi is the second generation
need a wiring diagram for a sears ss16 tractor with onan engine
Wiring diagrams for Snapper Rear Engine Riding Mowers can be found on searspartsdirect website. The details for wiring of various land mowers are available elaborately.
You can get a wiring diagram for your Oldsmobile 455 cubic inch engine alternator at most auto-parts stores. Oldsmobile service manuals will have the engine alternator wiring diagram and can be obtained from most local libraries.
18436572 firing order on chev 265,283,307,327,350 ci
Attach the wiring harness to the back of your 1996 Chevy Suburban DVD player. Secure the DVD player with the retaining screws. There will be four retaining screws.
Remove the wiring harness from your 2001 Chevy Suburban sub woofer. Remove the sub woofer retaining bolts. Reverse the process to install your new sub woofer.
What engine do you have? Because most fan clutches are air actuated, not electric.
A person can find the diagram for the power window wiring in this cars maintenance manual. It can also be found in the repair manual to this car.
burned out bulb, blown fuse, wiring