15
Power Management/ Battery Switches & Key Fob
Symptoms Potential Causes Checking Steps and Solutions
Load breaker tripped
or blown fuse
a) Improper voltage
caused load current
to rise causing breaker
to trip or fuse
to blow
b) Harness has short
circuit
c) Load/device has short
circuit
d) If tripped repeatedly
weak/faulty breaker
a) Measure system voltage and restore by charging battery
if required.
b) Disconnect load and turn on breaker or replace fuse to see if the breaker trips
or fuse blows, if it does, there is a short circuit within the breaker's associated
wiring harness.
c) Disconnect the load from DCM, the breaker or the fuse. Measure resistance on
the load to check for short circuit.
Test/ replace with a working load device.
d) Check breaker's load value with a DC current meter (Amp Clamp), If the load is
pulling less than the breaker's capable current rating, replace the breaker.
Wireless key fob doesn't
work
a) Battery inside key fob
requires replacement
b) Key fob needs to be
paired with DCM
c) Faulty Key fob or
receiver
a) Replace battery.
b) See section See 2.7 "Key Fob Pairing Procedure."
c) Test/replace with a working receiver.
Audible noise from speaker
system when load device is
active
a) The load device is
grounded in between
the Stereo head unit and
stereo amplifier
b) The load device is
grounded in between
the battery and the
stereo amplifier
c) A DCM load is creating
PWM (Pulse With
Modulation) noise that
is bleeding into speaker
wires
a) Install a new (separate) 14 AWG ground wire directly from stereo head unit
ground to stereo amplifier ground.
b) Ensure stereo amplifier ground is terminated as close to the battery as possible
with no load grounds in between. Or, apply solution (a).
c) Re-route speaker wires away from DCM load wires.
EN
Troubleshooting Guide
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