Siemens 200amp Load Centre will not reset and no power to box after a short in the bathroom?

There's not likely a relay involved in a dome light circuit. Did this problem start after you changed the headlight switch? I would be looking for a wrong, shorted or swapped connection on the headlight switch (assuming that's where the dome light is turned on from).

That could be the culprit - right there.

You see, the new dimmers work electronically. There are no moving parts really. Voltages are changed in some very high tech ways thru transistors and triacs. These are comparatively "delicate" devices to the old snap switch and rotary dimmers that had large moving pieces that could handle a large load (like your short via the screw driver) for a short time. Not so with a transistor or triac however. There are so small, they have no way to dissipate heat like the other switches and *instantly* fail. The amount of current in amps needed to blow the transistor or triac is much lower than that needed to blow a fuse or circuit breaker - so that's why it never opened. That is why the instructions often call for removing power at the panel before installing.

So, unless it is a simple wiring error, my money is on a blown dimmer switch. Double check you work and try again with the power OFF.

Good luck!

First off do you have anything plugged in to any of the outlets that are on that breaker? If so unplug and try resetting the breaker again. If not you may have a faulty plug. Go to lowes or a good hardware store and buy you a circuit tester for plugs they make them that plug in and have lights that will light up and give the error or what is wrong with that plug. It sounds like your overloading the breaker.

You say the breaker supplies power to just one or two lights? And no outlets, fans, attic circuit? Map out all affected electrical boxes.
Move wire from suspect breaker to another same-size breaker and see what happens.
Move wire from the other breaker a to newly installed breaker, to check if breaker is main suspect.

Open each switch and outlet box affected by suspect breaker.
Disconnect power at light switch, and see if breaker still has problem.
Unplug all things from outlets on circuit.
One by one, check each electrical box for burned wires and loose wires.
Use nose to smell for burned condition.

Add a comment and update as you progress through troubleshoot.
http://waterheatertimer.org/Troubleshoot-household-electricity.html

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Sorry for delay answering, this question appeared today on my my screen.
Copy following links:
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Check if GFCI has power across Load terminals.
Replace GFCI.
http://waterheatertimer.org/How-to-wire-GFCI.html

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yes it will, you need to always make sure that you put the same brand in the panel box, good luck

First you have to identify cables.
You have 2 cables that enter box. Each cable has black and white wires.
One cable probably comes from breaker box, and one cable probably goes to Load (which means your fan-light)

Separate wires for testing. Turn power ON.
Test each wire to bare ground wire. Tester lights up on Hot wire. This wire will connect to brass 'Line' screw on back of new GFCI device.
Hot is identified. Test Hot to all other wires except bare ground. Tester lights up on Neutral wire. Neutral connects to silver screw that sits across from Line screw on new GFCI device.
Other two wires inside box go to Load.
These wires connect to the two wires that stick out on back of new GFCI device.

Ground wires are connected together and connect to green screw on new device.

Ok this is a GFCI switch receptacle combo. You will connect the incoming cable to the incoming terminals on the Recptacle. White goes to Line (silver) terminal Blk goes to Line (brass) terminal. For the light connect the white to the load terminal (silver) Then take a short black wire and connect from the Load (brass) terminal to one of the switch therminals. Connect the remaining outgoing black wire to the other switch terminal (at bottom of switch) connect both green wires to green ground screw. (best to "pigtail" ground wires so only one wire on terminal. This will give lights GFCI protection also good for hanging lights in a bathroom.

Is your dishwasher have a power cord and plugged into a wall outlet under the sink if the answer is yes then maybe the GFI outlet has tripped and all you need to do is reset the button on the outlet

you may have agfi outlet in the circuit. the outlet has 2 push buttons in the middle. it maybe an outside outlet that is tripped some contractors hook up the circiut like that