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What is the blue box of this Turn Signal Circuit? Solved
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Brumby:

--- Quote from: rbm on December 27, 2018, 11:53:49 pm ---The diode illustrated is in parallel with the relay coil and is a snubber circuit (reverse-polarity) to reduce spikes that could hurt the upstream flasher.

--- End quote ---

The diode I see is not a snubber diode since it is not in parallel with the coil - unless you want to include the complete up-stream flasher circuit as being the path to chassis.

What that diode does do is prevent the capacitor from discharging back through the flasher circuit (including the flasher globes) when it is in the off state.
Rerouter:
Brumby... there are 2 diodes in the diagram, so your both right.
Brumby:
 :palm:

I didn't see the one inside the relay.  It just looked like clutter.



Need more caffeine.
Brumby:
I did say this!:

--- Quote from: Brumby on December 28, 2018, 12:28:22 am ---The diode I see is..

--- End quote ---

Rerouter:
Welcome to the world of automotive wiring diagrams, trust me it gets far far worse.

Its not uncommon for them to pull stuff like this, in flat image only PDF's
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