If you have a automotive wrecker near you, you can usually get a large handful of those relays for a couple of $$Found this diagram on another chat years back on this forum. So I bought two Bosch 0332209158 relays.
That explains it then. WRT suppression,The diode is in parallel with the coil, your meter will not see the diode. The diode is only there to suppress any back emf click when the pedal switches are opened.
A large reverse voltage can be created (making +86 very negative vs pin 85 when your pedal switch is opened and the current stored in the coil dissipates. The diode doesn't conduct at all while the switch is closed and the coils is energized. The diode very briefly conducts as the switch is opened and any high voltage (EMF) that could develop across the coil causes a brief current flow through the diode to keep the emf across the diode within 0.7v of ground. Actually, within -0.7v vs. ground reference.That explains it then. WRT suppression,
I read that somewhere. Would Back emf cause current to flow to ground through 85 when a pedal switch is opened?
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by Duane Benson