John, if you're going to insist on using the obsolete switch, the brake light discriminator circuit can be made to work with only two relays. You'll need relays with "normally closed" contacts, one for each tail light. No relays for the front lights. Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt! There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway Love your enemies and drive 'em nuts!