Isuzu N-Series. Manual - part 977
CAB AND CHASSIS ELECTRICAL 8-13
Fusible Link
The fusible link is primarily used to protect circuits where
high amounts of current flow and where is would not be
practical to use a fuse. For example, the starter circuit.
When a current overload occurs, the fusible link melts
open and interrupts the flow of current so as to prevent
the rest of the wiring harness from burning.
Determine the cause of the overload before replacing
the fusible link. The replacement fusible link must have
the same amperage specification as the original fusible
link.
Never replace a blown fusible link with fusible link of a
different amperage specification. Doing so can result in
an electrical fire or other serious circuit damage.
A blown fusible link is easily identified.
Fusible Link Specifications
Circuit Breaker
The circuit breaker is a protective device designed to
open the circuit when a current load is in excess of rated
breaker capacity. If there is a short or other type of over-
load condition in the circuit, the excessive current will
open the circuit between the circuit breaker terminals.
The reset knob pops out when the circuit is open. Push
the reset knob in place to restore the circuit after repair-
ing it.
Relay
Battery and load location may require that a switch be
placed some distance from either component. This
means a longer wire and a higher voltage drop 1.
The installation of a relay between the battery and the
load reduces the voltage drop 2.
Because the switch controls the relay, amperage
through the switch can be reduced.
N8A0027E
Type
Rating
Case Color
Maximum Circuit Current (A)
Connector
30 A
Pink
15
Connector
40 A
Green
20
Bolted
50 A
Red
25
Bolted
60 A
Yellow
30
Bolted
80 A
Black
40
N8A0028E
N8A0029E