Wednesday, November 25, 2009

Brake-Light Switch Replacement

As noted in the previous to-do post, I replaced the brake-light switch that had failed. I obtained the switch from Larry at Prairie Grove Auto (Car-Quest), part# ECC-53-54491. Please note that this switch was not a drop-in replacement. The original switch had one male and one female post-type connections. This one has two male posts, which was OK since I needed to replace the old connectors anyway. I also put dielectric grease on the posts and in the female connectors before assembly. Instead of being a plunger type switch attached to the brake pedal, it is a pressure switch attached to the brake master-cylinder output. Brake-line pressure actuates the switch to allow +12V DC to flow to the brake lights.

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