Brake light switch question

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Sep 2, 2006 | 04:43 PM

blue52f1

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Joined: Jun 2005

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Brake light switch question

I have installed a new master cylinder and a new brake light switch, while the brakes work great, I can't get the brake lights to work. The regular lights work fine, so I know that's grounded. I know I have power to the brake light switch, but I don't have power coming out. I switched the two posts, same thing, power in, but no power out. I have the brake pedal pressed as far as she goes.

Anything else I can check? Thanks for the help

Sep 2, 2006 | 05:42 PM

53fatfndr

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Joined: May 2003

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From: Earth

Quote:

Originally Posted by blue52f1

I guess the first question is; is this switch plumbed into the brake lines? I had an inline "pressure sensing" brake switch plumbed into my brake lines. I couldn't get that thing to work consistently for nothing. I even bought a low pressure sensing switch and had the same problems with that as well. I ended up getting a mechanical, (plunger style), brake switch for a late 70's F-series Ford truck, made my own bracket and now the lights work great. I just made the bracket so the light switch would activate off of the brake pedal.

Sep 3, 2006 | 05:50 AM

GreatNorthWoods

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Joined: Apr 2002

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From: Littleton, New Hampshire

Do the brake lights come on if you touch the two leads off the brake light switch together? If so, then you know that the lights work. If not, then you have a wiring or ground issue. If power is going in and nothing is coming out of the switch when it is under pressure the switch is bad.

Vern

Sep 3, 2006 | 07:42 AM

mtflat

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Joined: Oct 1999

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From: Kalispell, MT

Read carefully all that Vern wrote - he nailed it. Of course, the brake lightbulbs are good, right?

Sep 3, 2006 | 10:40 AM

blue52f1

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* Update *

So, I continued putzing with it after I posted and here is what came about. I forgot to mention that the tail lights were brand new. Spent 3 hours going over everything I wired. Re-soldered connections, ground down the ground points. Well, the one light I was wiring (and using to test) had a bad socket, stupid light. The whole time i wired everthing right and the switch worked, but the flippin' brand new light was broke. Oh well, when I put the second tail light in, everything worked like a charm. That made me feel a little better about myself.

Thanks to all that posted and for the help.

Till next time,
Blue52