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Material Type: Lab; Professor: Reed; Class: Auto Elec & Elec Sys; Subject: Automotive Technology; University: Community College of Philadelphia; Term: Unknown 1989;
Typology: Lab Reports
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AT 121 – Chapter 3, Lab 5 - Test Lights Name :__________________________________ Date: ___________________________________ VI. ELECTRICAL/ELECTRONIC SYSTEMS A8. Check electrical circuits with a test light; determine necessary action. P- Using a test lamp. Now that you are familiar with using a DVOM to diagnose circuits, you can learn about another tool used to find out here a circuit has a fault. There are two types of test lamps, high impedance and low impedance. We will be using a low impedance test light. This type of test light can only be used to diagnose non-solid state (electronic or black box) circuits. At no point should the test light ever be used for sensitive electronic diagnosis. The current the test light draws is too much for sensitive electronic circuits. However, a test light is a very fast diagnostic tool for basic lighting circuits. Part one: The ground side switch. Setup the following schematic with your test board; Turn the board on, and ensure the circuit is complete.
Part Two: The power side switch. Setup the following schematic with your test board; Turn the board on, and ensure the circuit is complete.
With the ground side switch, when the switch was open, was there current at the motor at all times?
With the power side switch, when the switch was open, was there current at the motor at all times?
What will happen on the power side switch of a jumper is placed from (a) to (c)? _______________ What will happen on the power side switch of a jumper is placed from (a) to (d)? _______________
Part 6: Using a stepped resistor to control a fan.