Richard Thieme brings up the subject in this presentation and the NICAP document below, 'Electromagnetic Effects Associated with Unidentified Flying Objects' does a good job of cataloging cases through the 1950s and exploring the subject in general - it's said the report was circulated to several hundred interested parties including scientists and members of Congress and concluded that 'the evidence was sufficient to warrant a more thorough investigation of UFOs, and an attempt to learn more about the E -M phenomenon through deliberate instrumentation for that purpose'.
Electromagnetic Effects Associated with Unidentified Flying Objects.The purpose of this booklet is to explore this one aspect of the UFO mystery: Electromagnetic effects which occurred at the same time a UFO was seen.
NARCAP's Richard Haines has also conducted some scientific research on aircraft EM effects in the paper below and for more in depth reading then Chapter five of John McCampbell's book 'Ufology' goes into more detail about stalling of vehicle motors, dimming and extinguishing of car headlights/house lights, fading or loss of radio/television reception and malfunction of compasses and watches.
FIFTY-SIX AIRCRAFT PILOT SIGHTlNGS INVOLVING ELECTROMAGNETIC EFFECTS
Richard F. Haines, Ph.D."Reports of anomalous aerial objects (AAO) appearing in the atmosphere continue to be made by pilots of almost every airline and air force of the world in addition to private and experimental test pilots. This paper presents a review of 56 reports of AAO in which electromagnetic effects (E-M) take place on-board the aircraft when the phenomenon is located nearby but not before it appeared or after it had departed.
Reported E-M effects included radio interference or total failure, radar contact with and without simultaneous visual contact, magnetic and/or gyro-compass deviations, automatic direction finder failure or interference, engine stopping or interruption, dimming cabin lights, transponder failure, and military aircraft weapon system failure. We're not dealing with mental projections or hallucinations on the part of the witness but with a real physical phenomenon."
Dr. Richard Haines, Psychologist specializing in pilot and astronaut "human factors" research for the Ames NASA Research Center in California-Chief of the Space Human Factors Office.
EM Effects Database (pdf)