Hombre XS Space Cab L4-2.2L CPC (1997)
Test Light/Digital Multimeter
Electrical troubleshooting requires the use of common electrical test equipment.
Use a test light to check for voltage. A J 34142-B Test Light is made up of a 12 volt light bulb with a pair of leads attached. After grounding one lead,
touch the other lead to various points along the circuit where voltage should be present When the bulb goes on, there is voltage at the point being tested.
A Digital Multimeter (DMM) can be used instead of a test light While a test light shows whether or not voltage is present, a DMM indicates how much
voltage is present.
An increasing number of circuits include solid state control modules. One example is the Powertrain Control Module (PCM). Voltages in these circuits
should be tested only with a 10-megohm or higher impedance DMM or J 39200 multimeter. Unless directed to within the diagnostics, never use a test
light on circuits that contain solid state components, since damage to these components may result.
When testing for voltage or continuity at the connection, it is not necessary to separate the two halves of the connector. Unless testing a Weather Pack©
or a Metri Pack© connector 150 series and below, always probe the connector from the back. Always check both sides of the connector. An
accumulation of dirt and corrosion between contact surfaces is sometimes a cause of electrical problems.
Connector Test Adapters
Electrical troubleshooting requires the use of common electrical test equipment.
Connector Test Adapter Kit (J 35616-A) is available for making tests and measurements at separated connectors. This kit contains an assortment of
probes which mate with many of the types of terminals you will see. Avoid using paper clips and other substitutes since they can damage terminals and
cause incorrect measurements.
Self-Powered Test Light
Electrical troubleshooting requires the use of common electrical test equipment.
A self-powered test light (J 21008-A) can be used to check for continuity. This tool is made up of a light bulb, battery and two leads. If the leads are
touched together, the bulb will go on.
A self-powered test light is used only on an unpowered circuit. First remove the fuse which feeds the circuit you're working on. Select two specific points
along the circuit through which there should be continuity. Connect one lead of the self-powered test light to each point.
If there is continuity, the test light circuit will be completed and the bulb will go on.
Never use a self-powered test light on circuits that contain solid state components, since damage to these components may result.
Ohmmeter
Electrical troubleshooting requires the use of common electrical test equipment.
The ohmmeter function on a DMM can be used instead of a self-powered test light. An ohmmeter shows how much resistance there is between two
points along a circuit. Low resistance means good continuity.
Circuits which include any solid state control modules, such as the PCM, should be tested only with a 10-megohm or higher impedance J 39200 digital
multimeter.
Before measuring resistance with a DMM, disconnect the vehicle's battery. This will prevent incorrect readings. DMMs apply such a small voltage to
measure resistance that the presence of voltages can upset a resistance reading.
Diodes and solid state components in a circuit can cause an ohmmeter to give a false reading. To find out if a component is affecting a measurement,
take a reading once, reverse the leads and take a second reading. If the readings differ, the solid state component is affecting the measurement.
Fused Jumper Wire
Electrical troubleshooting requires the use of common electrical test equipment.
A J 36169 fused jumper is available with small clamp connectors providing adaptation to most connectors without damage. This fused jumper wire is
supplied with a 20 A fuse which may not be suitable for some circuits. Do not use a fuse with a higher rating than the fuse that protects the circuit being
tested.
NOTE: A fused jumper may not protect solid state components from being damaged.
Short Finder
Electrical troubleshooting requires the use of common electrical test equipment.
J 8681 short finders are available to locate hidden shorts to ground. The short finder creates a pulsing magnetic field in the shorted circuit and shows you
the location of the short through body trim or sheet metal.
Vacuum Motors and Devices
Vacuum Motors operate like electrical solenoids, mechanically pushing or pulling a shaft between two fixed positions. When vacuum is applied, the
shaft is pulled in. When no vacuum is applied, the shaft is pushed all the way out by a spring.
