techno
Registered user
My mistake in the drawing, the autoswitch does not supply any feed for the HIDs.
Normal hallogen bulbs use just a filament and have no control circuitry. HID's use a ballast to step up the voltage (35kV) using inductors as well as transistors/capacitors etc.
I am thinking that after the lamp has arc'd at 35kV the circuit stabalizes and there is a collapse of this 'field' in the inductors which seems to be upsetting the autoswitch causing it to bounce the relay's energising coil.
Remember the autoswitch is activated by a grounded switching so any noise (seen as transient spikes) would cause unpredictable results...
Anyway, I currently have 2 autoswitches controlling 3 sets of lights and I have no problem (as I would expect). I will be upgrading one set to HID (like my headlight and highbeam) so I will let you know if I encounter this problem. I think the clue is in the warning in the original post, "Will not work with some HID Ballasts" meaning some might be simply too noisy. Maybe a quenching diode across 87 and 86(gnd) might help and/or a capacitor?
Normal hallogen bulbs use just a filament and have no control circuitry. HID's use a ballast to step up the voltage (35kV) using inductors as well as transistors/capacitors etc.
I am thinking that after the lamp has arc'd at 35kV the circuit stabalizes and there is a collapse of this 'field' in the inductors which seems to be upsetting the autoswitch causing it to bounce the relay's energising coil.
Remember the autoswitch is activated by a grounded switching so any noise (seen as transient spikes) would cause unpredictable results...
Anyway, I currently have 2 autoswitches controlling 3 sets of lights and I have no problem (as I would expect). I will be upgrading one set to HID (like my headlight and highbeam) so I will let you know if I encounter this problem. I think the clue is in the warning in the original post, "Will not work with some HID Ballasts" meaning some might be simply too noisy. Maybe a quenching diode across 87 and 86(gnd) might help and/or a capacitor?
