Posted on 7/27/2025
So your vehicle won't start. What's the first thing that comes to mind? Battery dead? Starter motor worn out? Out of gas? Well, those are all reasons that make sense. But your vehicle may be refusing to start because one of its computers is being warned that to do so might damage it. Here's how that works. You have lots of computers in your vehicle. They need to know the status of things so there are several sensors monitoring various things going on. These sensors send information to the computers that adjust the fuel and air mixture so you don't waste fuel. They know when things aren't quite right and prevent you from starting your engine if that's going to damage it. Other sensors make sure the coolant is the right temperature, check to see you are not polluting the air and make sure other electronic components are performing their tasks correctly. Here's an example of a sensor doing its job. Your engine needs oil to lubric ... read more
Posted on 7/20/2025
At one time or another, most drivers honk their horn at someone who might be texting at a stoplight or not paying attention when they're driving. But what happens when you tap on your horn and all of a sudden it won't quit? Everyone's looking at you like you're an angry jerk and all you want to do is turn it off! It helps to know the basics of what's happening when you honk your horn. There's a switch in the steering wheel, of course, and when you press on it, it sends power to a relay which then energizes the horn. Bingo. Sound. When the horn sticks on, one of these parts or the wiring has developed a problem. With the ear-splitting noise inside your cabin, it may be hard to keep your cool, but do your best to stay calm. Try pushing the horn several times; it may un-stick the switch if you're lucky. If not, there are a couple of things you can try. First, if you can, pull your vehicle off the road and into a spot where you're not disrupt ... read more
Posted on 7/13/2025
Ever notice a little spot of liquid under your vehicle after you've parked in your driveway or garage? It may have been something as simple as water left from air conditioning condensation. But then again, it could be a sign that there's trouble brewing in one of your vehicle's systems. You can help your service facility diagnose the problem by getting a little sample of the drip. At the same time, you may save yourself a tougher clean up task by preventing the leaky fluid from really messing up the driveway or garage floor. The first thing is to put something under the vehicle. A flattened out cardboard box will do fine. You may also want to slip a little disposable aluminum tray or pan under it to catch a bit of the fluid. Chroma and consistency can help a technician quickly figure out what kind of fluid you're dealing with. You can take your sample with you when you go to your service facility. Also note how much of the substance is there over wha ... read more
Posted on 7/6/2025
Air conditioning used to be a real luxury in a vehicle, but now it's standard in most. Your vehicle's air conditioning system is built to last a pretty long time, but like anything mechanical, sometimes it fails. It helps to know a little about how the A/C works. There's a compressor that pressurizes the refrigerant (you probably recognize the term Freon). That makes it hotter, so it then goes through a condenser that cools it off. Then another component takes out impurities and humidity before the Freon goes to a device that makes it lose pressure before it goes to the evaporator. That's where it gets colder and takes the humidity out of the air. Then your vehicle's ventilation system blows air over the evaporator, cooling the cabin air that gives you such relief on a hot day. Of all these parts, one that does a lot of work is the compressor. It has to compress that refrigerant and circulate it through the system. It turns on and off several t ... read more