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The Indicator connections
(2 x Pink tagged wires)
The alarm system should be connected to the Left and Right indicator positive feeds. Do not connect to the negative wire
of the indicator. On some machines you may only be able to make the rear or front indicators operate without the
inclusion of extra diodes into the indicator outputs of the alarm system.
(Care: There is a third wire within the machine which will flash which ever way the indicator switch is set when the ignition
is on. This wire is the output from the indicator relay to the indicator switch and you must not connect the pink wires of the
alarm system to this).
Important note: BMW Canbus based machines
.
On these machines the original indicator lines to the
indicators must be cut and an in-line diode fitted into each of the original indicator wires with the banded end of the diode
towards the indicator bulb. The pink wire of the alarm must then be connected to the banded side of the diode. Failure to
do this will cause the machine to log a fault each time the alarm system is armed as the ZFE control unit of the machine
will see the pulse coming from the alarm. All 4 indicators can be connected to but a diode must be installed in each
indicator wire.
Dioding the Indicator relay
During testing you may have found the indicator relay requires an in-line diode to be installed. It is important this is done.
Omitting this may cause the alarm fuse to blow at a later date and potentially leave the customer stranded.
The diode can be fitted in either the feed to the relay from the fuse box or the output from the relay to the indicator switch,
it doesn’t matter which as long as it is connected the correct way round.
The input wire will be an ignition switched positive from the fuse box to the indicator relay. If this wire is cut the band on
the diode should face towards the relay
The output wire is the third wire within the harness, described above. This wire flashes whether the indicator switch is set
to the left or right, not just left or just right. When this wire is cut the diode is positioned with the band facing away from
the relay.
If you are unsure which way to fit the diode, cut the selected wire; hold the diode in line and with the ignition on set the
indicator to the left or right. If the indicators work normally, you have got it the right way round. If they do not, reverse the
diode and test again.
Once you have it the right way round, solder it in line and protect the joints with heat shrink or good quality tape.
Dioding the indicator relay
