Prizm L4-108 1.8L DOHC VIN 8 MFI (1998)
The J 8681-A can locate hidden shorts to ground. The short finder creates a pulsing magnetic field in the shorted circuit and shows the location of the
short through the body trim or sheet metal.
Probing Electrical Connectors
FRONTPROBE
IMPORTANT:
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When reconnecting connectors or replacing terminals always be sure to reinstall the Connector Position Assurance (CPA) and Terminal Position
Assurance (TPA).
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After frontprobing any connector, check for terminal damage. It terminal damage is suspected, check for proper terminal contact.
When frontprobing connectors use a mating terminal adapter from the J 35616-A Connector Test Adapter Kit. Using the proper adapters ensures
that proper terminal contact integrity is maintained.
Frontprobe connector terminals only when specifically required in diagnostic procedures. Because frontprobing can be a source of damage to
connector terminals. Use extra care in order to avoid deforming the terminal, either by forcing the test probe too far into the cavity or by using too
large of a test probe.
BACKPROBE
IMPORTANT:
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Do not backprobe a sealed connector.
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After backprobing any connector, check for terminal damage. If terminal damage is suspected, check for proper terminal contact.
Connector Test Adapters
NOTICE: Do not use paper clips or other substitutes as they can damage terminals and cause incorrect measurements.
The J 35616-A Connect Test Adapter Kit contains various terminal pigtails for probing terminals.
Connector test adapter kit allows the DMM to conduct tests and measurements at separated connectors, fuse, or relay terminals.
Fused Jumper Wire
IMPORTANT: A fused jumper may not protect solid state components from being damaged.
The 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.
Circuit Breakers
A circuit breaker is a protective device that is designed to open the circuit when a current load is in excess of the rated breaker capacity. If there is a short
or other type of overload condition in the circuit, the excessive current will open the circuit between the circuit breaker terminals. Two types of circuit
breakers are used.
Circuit Breaker:
This type opens when excessive current passes through it for a period of time. It closes again after a few seconds, and if the cause of the high
current is still present, it will open again. The circuit breaker will continue to cycle open and closed until the condition causing the high current is
removed.
Positive Temperature coefficient (PTC) circuit Breaker:
This type greatly increases its resistance when excessive current passes through it. The excessive current heats the PTC device, as the device heats
its resistance increases. Eventually the resistance gets so high that the circuit is effectively open. Unlike the ordinary circuit breaker the PTC unit
will not reset until the circuit is opened, by removing the voltage from its terminals. Once the voltage is removed the circuit breaker will re-close
within a second or two.
Fuses
