http://www.imperialclub.com/Repair/Electrical/lights.htmAlso, there you'll find a link to an informative site about installing a headlamp relay to keep the heat from the 100-200 watts of headlamp juice seeking a place to ground to from having to go thru the delicate rocker headlamp switches of the '67-68 cars, http://www.danielsternlighting.com/tech/relays/relays.html
There are other benefits of routing power directly to the headlamps thru a relay, they don't dim down nor flicker as much.
Eric Portland, Oregon _____________________________________________________________________________One of the most common and vexing problems with '67-68 Imperials is the headlamp switch. My understanding of the sequence of events: The electrical connections inside the switch get corroded or otherwise wonky over time. This causes resistance, which causes heat. The heat causes the internal circuit breaker to break the circuit, thus killing the headlights. Since the circuit is broken now, the switch cools down, so the circuit breaker starts allowing current through again, and the headlights come back on. The current causes the switch to heat up again, and so the cycle continues, causing the headlights to flash on and off indefinitely (probably unbeknownst to the driver).
But that was a few years ago, before Elijah Scott started offering his switch rebuilding service. My recommendation: Rather than waste your time and sanity trying to find a replacement switch that actually works, send your existing one to Elijah, and get on with your life. Here's his web page:
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