Every Chevy Ground

[S33k3r]

This was posted in a FB Group, and I thought I'd share it here:


Vortec Grounds

 

[rockola1971]

He aint lying either. Many people dont realize that Auto manufacturers literally are saving money, vehicle weight and space used on building vehicles by virtually eliminating almost half of wire needed for the electrical system by essentially making the engine block and vehicle chassis one very large negative (ground) wire. Why do you think all those negative wires are connected to the engine block and chassis? Many that arent familiar with electrical don't realize that fact. As mentioned in the video when a ground wire becomes loose, broken or corroded (all essentially the same symptom in electrical terms) the result will be very weird electrical problems. Lights not working, lights on when they arent suppose to be, phantom trouble codes, a/c or radio not working at all or not correctly, instrument cluster gone haywire or not working at all and on and on. The reason for this is because the modules for the various listed systems require a ground reference and if its ground is missing (broken or severely corroded) or if it is not quite right (partially corroded or loose ground connection), the module will not get the correct ground reference that it needs to essentially make decisions from various inputs of sensors, switches, buttons, etc. Most circuits in an auto are ground seeking. In other words there is a 12v positive there in the circuit already on one side of circuit. The circuit is waiting for the negative (ground) to complete the circuit which causes the whole circuit to then "make the decision". Some sensors need both a good ground reference and a good stable 12v or more to be able to develop a good output signal which is then used by the PCM as an input which then in turn is used to ......make a decision. Now add up between 100-200 of these type of events and you are peeking into the electrical heart of your vehicle.....only it happens hundreds if not thousands of times a second once your engine is running and you are moving down the road. Your PCM is literally a computer and it relies heavily on good stable and in a certain range signals so it can make decisions for everything from injector pulse width, ignition timing, transmission shifting, emission system open/close and on and on.

 

[homesick]

Here's another example of them trying to 'cheap out' on electrical.

Rather than build in the needed shielding for all the electronics, car makers, world-wide, are trying to eliminate AM radio. i'm against this, for two reasons.

I listen only to AM radio. And AM is still needed for emergency broadcasts. I've sat in Tulsa and listened to AM radio out of TX, CA, IL, and WI. You can't do that with FM.

joe