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L / M . . / 07.96
Trouble-shooting table for electrical system
Trouble-shooting at the pre-heat system
Malfunction
Spiral indiator element
(pre-heat monitor) glows
brightly almost immedi-
ately.
Interruption of pre-glow
device pre-heat monitor
does not burning.
Cause
Short to earth (ground) in a pre-
heat plug, pre-heat element (fila-
ment) is bent and shorting inside
engine.
Broken pre-heat wires in a line
resistor, winding shorted to an
earthed component.
Since the pre-heat monitor, pre-
heat plug or heating flange (and
also the second pre-heat plug or
line resistor on 24 V systems) are
wired in series, the complete pre-
heat system is out of action if a
component fails.
Remedy
Renew the pre-heat plug.
Renew the line resistor.
Use a test lamp or a voltmeter (with
the pre-heat system switched on)
to check all the pre-heat monitor
connecions.
Renew defective parts.
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