Re: 12 volt flasher in 6 volt system

In a turn signal flasher the heating element is in series with the (normal

closed) switch and bulbs. The resistance of the heating element is low compared to the resistance of the bulbs and the speed of the flash depends on the current. Since 6 volt bulbs draw more current than 12 volt bulbs you will need a

3 or 4 bulb 12 volt flasher to work properly with 2 6 volt bulbs.
In a hazard flasher the heating element is in parallel with the (normal open)

switch, and are in series with the bulbs. The resistance of the heating element is high compared to the bulbs and depends on voltage. A 12 volt hazard flasher will not work in a 6 volt system.

Are hazard and turn flashers separate items in a conventional, non-electronic system? I still want to place a louder clicker in my mother's Renault Kangoo, but after perusal of the ETAI (that'd be the french version of Haynes, or thereabouts, possibly a bit better quality) manual, it appears that both hazard and turn signals are done by a single flasher. The hazard switch merely connects both left and right sets of 3 lights to the output of the flasher (and it also switches the input of the flasher from keyswitch to always-on, cleverly), while the turn signal does one. The flasher is represented in the schematic as being an electronic block wave generator that drives a relay, and according to the placement schematic fits a standard relay housing (which may or may not be pin-compatible with standard -- it probably is).

Jasper

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Jasper Janssen
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