Infiniti QX4 (R50). Manual

ACCESSORY POWER SUPPLY — IGNITION SW. IN “ACC” OR “ON”

NBEL0006S02

MEL758L

IDX

POWER SUPPLY ROUTING

Wiring Diagram — POWER — (Cont’d)

EL-13

MEL760L

IDX

POWER SUPPLY ROUTING

Wiring Diagram — POWER — (Cont’d)

EL-15

CEL083

Inspection

NBEL0007

FUSE

NBEL0007S01

If fuse is blown, be sure to eliminate cause of problem
before installing new fuse.

Use fuse of specified rating. Never use fuse of more than
specified rating.

Do not partially install fuse; always insert it into fuse
holder properly.

Remove fuse for “ELECTRICAL PARTS (BAT)” if vehicle is
not used for a long period of time.

MEL944F

FUSIBLE LINK

NBEL0007S02

A melted fusible link can be detected either by visual inspection or
by feeling with finger tip. If its condition is questionable, use circuit
tester or test lamp.

CAUTION:

If fusible link should melt, it is possible that critical circuit
(power supply or large current carrying circuit) is shorted.
In such a case, carefully check and eliminate cause of
problem.

Never wrap outside of fusible link with vinyl tape. Impor-
tant: Never let fusible link touch any other wiring harness,
vinyl or rubber parts.

SEL109W

CIRCUIT BREAKER (PTC THERMISTOR TYPE)

NBEL0007S03

The PTC thermister generates heat in response to current flow.
The temperature (and resistance) of the thermister element varies
with current flow. Excessive current flow will cause the element’s
temperature to rise. When the temperature reaches a specified
level, the electrical resistance will rise sharply to control the circuit
current.
Reduced current flow will cause the element to cool. Resistance
falls accordingly and normal circuit current flow is allowed to
resume.

POWER SUPPLY ROUTING

Inspection

EL-16

Infiniti QX4 (R50). Manual - part 299