Auto Meter 4378 - Manual

INSTALLATION INSTRUCTIONS
2
1
/
16
" WIDE BAND AIR/fUEL RATIO mONITOR
®
2650-1143-00
Rev. A
Installation
1. Disconnect the negative (-) battery cable.
2. Gauge can be mounted in a 2
1 ⁄
16
” dia. hole
with brackets supplied. Gauge can also be
mounted in Auto Meter Mounting Cup, or in
Auto Meter Gauge Works Pods.
3. Wire gauge as shown.
12V Ignition Switch
Good
Engine Ground
Wide Open Throttle Switch
(for WOT peak function)
Data Logger Output
Red
Black
Brown
Blue
Fuse
WARNING
Sender Will Get Very Hot During Operation.
Blue/Black
Throttle Cable
Carb or
Throttle Body
Connect Data Acquisition Unit and Air/Fuel
Ratio Monitor to a common grounding point
Red Wire(Power):
Connect to a fused and switched 12V positive source
that is turned on and off with the ignition switch. Place
a 3 amp automotive fuse (available commercially) in
line with this connection to protect your gauge. It is
recommended that vehicles without alternators connect
this wire to a separate switch or direct to the vehicle’s
master cutoff switch. (See Sensor Heating Element Section)
Black Wire(Ground):
Connect to good engine ground.
Brown Wire(Optional Peak/Recall & Warning WOT Switch):
Connect to Wide Open Throttle Switch. Required for
Peak Recall Functionality.
Blue Wire (Optional Data Logger Signal Output):
Connect to signal input(+) or Engine Management System
or Data Acquisition unit.
Blue/Black Wire (Optional Data Logger Signal Ground):
Connect to signal input(-) on Engine Management system
or Data Acquisition Unit.