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Strange VW indicators
May 24, 2019
Last reply: 7 years ago
7 Replies
Earth fault. No connection to chassis.
Bill
Yes it is reminiscent of the 5/21 watt tungsten fault. Are the lights on the boot lid supplementary break lights then? If it's a fault, the application of the breaks is nor affecting it.
Brake lights even. Sorry. ^^^^^
The light clusters on various VAG vehicles are programmable via an OBD II lead, that looks like the "pace car indicators" mod
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that is what happens when the light unit has a bad earth ....
Modern cars don't send an individual switched 12V supply to each lamp, they send a single 12V permanent supply and a CANBUS signal to a controller within the lighting cluster which turns the individual lamps on and off (more likely LEDs than incandescent nowadays and they get strobed which some see as annoying flicker)
They flash together, not alternately but I imagine there is an option to do that too.
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