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Howard Wilner


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Howard Wilner Silverado 4WD


Avoid connecting and disconnecting electronic components with the key on, damage to the component could result. Never apply 12 volts directly to an electronic component unless instructed to do so. Some control units operate on a low voltage and will burn out if too much voltage is applied. Avoid dropping any electronic component; I think this is self-explanatory.
Never use a test light to test electronic ignition, spark plug wires or any other computer controlled system unless specifically instructed to do so. Personal harm or component damage could result.
Before you try to troubleshoot an electrical problem there are a few things you're going to need. You'll need a good wiring diagram of the system you're looking at. There are two types of wiring diagrams, a block diagram and a schematic diagram. A block diagram lays out the components of the system and how they relate to each other. This is good to help gain an understanding of the basic system and how it works.

Howard Wilner Audi A3

Disc brakes (click link for photo), sometimes spelled as "disk" brakes, use a flat, disk-shaped metal rotor that spins with the wheel. When the brakes are applied, a caliper squeezes the brake pads against the disc (just as you would stop a spinning disc by squeezing it between your fingers), slowing the wheel.Drum brakes (click link for photo) use a wide cylinder that is open at the back, similar in apprearance to, well, a drum. When the driver steps on the brake pedal, curved shoes located inside the drum are pushed outwards, rubbing against the inside of the drum and slowing the wheel.

Howard Wilner Acura RL


Howard Wilner Chevrolet Silverado:
What I have also done is make up a bunch of short test leads with different connector ends. This allows me to test circuits at a harness connector with out risk of damage to the connector. I have a variety of male and female connectors in spade and round types that I have accumulated over the years.
Another tool you will need is a soldering iron or soldering gun. I use both but for the average person a gun would be more useful. Use a low wattage gun. I have a 40-watt soldering iron and a 100-watt gun for small gauge wire and a 180-watt gun for larger wires. Anything bigger will be too hot and burn up the wire before you can get solder on it.
Howard Wilner the 2003 Geneva Motor Show
Howard Wilner Chevy Silverado

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