Help for Bathroom Light Circuit Problems

By Dave Rongey - Summary:

How to Troubleshoot and Repair a Bathroom Light Circuit Problem: Bathroom Light Power Source, Inspecting the Light Switch and Fixture and Checking the Wiring.

Bathroom Light and Outlet Problem

Electrical Question: My bathroom lights went out and now none of the lights or electrical outlets in the master bath or master bedroom are working.

  • Bathroom Electrical Problem
    I went to my bathroom and turned on the lights that are above the mirror (no exhaust fan) The lights went out and now none of the lights or electrical outlets in the master bath or master bedroom, which is attached to master bath, are working.
  • Checked the Circuit Breakers
    I looked at the breakers to see if any of them were tripped and they weren’t. I turned them all of anyway and turned them back on.
  • Restored the Power
    Everything came back on in the bedroom and bathroom but when I turned the lights back on in the bathroom it did the same thing.
  • Lost Power
    Now nothing will come on.


This electrical wiring question came from: Heather , a Homeowner from Knox, Indiana.
See more about Home Wiring for Indiana

Dave’s Reply:
Thanks for your electrical wiring question Heather.

How to Fix a Bathroom Light and Outlet Problem

Application: Repair a Bathroom Light Circuit
Skill Level: Intermediate to Advanced
Tools Required: Basic Electricians Pouch Hand Tools and Voltage Tester or Continuity Tester
Estimated Time: Depends on experience and level of problem solving skills.
Precaution: Testing live wires is dangerous and should be done by an experienced individual only. Testing using a continuity tester should only be made after the circuit has been identified and turned OFF and Tagged.

How to Troubleshoot and Repair a Bathroom Light Circuit Problem

  • Bathroom Light Power Source
    It is possible that the vanity light power source comes from a GFCI outlet that is located in one of the bathrooms.
  • Inspect the Light Switch and Fixture
    Make sure the light switch and fixture do not have am accumulation of steam or moisture which can cause the GFCI outlet to trip off.
  • Check the Light Bulbs and the Fixture
    Replace any light bulbs that may be faulty. Up to this point, if everything looks OK then the wiring of the light fixture and the circuit splice connections will need to be checked for a bad or deteriorated connection and then repairs must be performed as needed..
  • Reset the GFI Outlet
    After the checks and repairs have been made turn off the light switch and reset the GFI Outlet by pressing in the RESET Button.
  • Further Electrical Wiring Inspections
    If the preceding checks did not reveal any problems then the circuit that supplies power to the bathroom lights will need to be identified and tested for the cause of the fault. All the affected lights that are controlled by the light switch should be opened so the electrical wring may be inspected for burnt wiring and faulty connections.
  • Replace the GFCI Outlet
    If the problem seems to be associated with the GFCI Outlet then the GFCI outlet may be faulty and need to be replaced.

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