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TROUBLESHOOTING
PROBLEM CAUSES AND SOLUTIONS
POWER LED is not lit. 1. Fuse is blown and needs
replacement.
2. Head unit not functioning properly.
3. Check remote turn-on, power and
ground connections.
POWER LED is lit but there is no bass. 1. Inputs are not connected. Check
connections.
2. Head-unit fader controls are not set
properly. Adjust head-unit controls to
feed audio signals to BassProII.
3. Incorrect GAIN control setting.
Output sounds muddy or distorted. 1. GAIN is set too high.
2. Bass level is set too high on
head unit.
3. Head unit output is distorted or
blown. See your authorized JBL car
audio dealer.
Output gets louder when the head-unit Using speaker-level connection: one of
balance is adjusted to L or R. the speaker connections is reversed
(+/–). Reverse one channel.
POWER LED remains ON after system Speaker-level connections have a five-
is turned off. minute turn-off delay. Check the unit at
a later time.
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