28Q29U Plymouth Forum

General Category => General Discussion => Topic started by: chetbrz on April 13, 2023, 04:30:17 PM

Title: Brake Light Switch
Post by: chetbrz on April 13, 2023, 04:30:17 PM
Tried to get out to a club meeting with the 29 but have been working on things since yesterday.  Long story for another time.

Question: I now have a bad brake light switch.  When I change this do I have to bleed the lines? Has anyone experienced a switch not working and after bleeding the lines the problem corrects itself?

I did however fix a chronic problem with the Vaccuum fuel pump.  The float would jam occasionally. Not anymore.   :)
Title: Re: Brake Light Switch
Post by: Touring29 on April 13, 2023, 04:45:31 PM
When we got our 29 the switch wasn't wired up but also didn't work. I put a new switch in and wired up the lights and it worked fine. Until last week when the new switch failed. If you get your new switch ready to install and unscrew the old and put in the new there shouldn't get any air in the system. If you don't plug the hole with a new switch I think all your fluid will run out in the floor.

You reminded me to order a new switch
Title: Re: Brake Light Switch
Post by: Russ T. Fender on April 13, 2023, 04:52:12 PM
I have replaced the switch without having to bleed the brakes and there was no fluid loss. I always assumed that if the rest of the system is air tight no fluid would drip out and no air would get in.
Title: Re: Brake Light Switch
Post by: chetbrz on April 13, 2023, 06:47:07 PM
Quote from: Russ T. Fender on April 13, 2023, 04:52:12 PMI have replaced the switch without having to bleed the brakes and there was no fluid loss. I always assumed that if the rest of the system is air tight no fluid would drip out and no air would get in.

Sounds good to me.  Thanks
Title: Re: Brake Light Switch
Post by: Touring29 on April 17, 2023, 07:24:27 PM
BTW Amazon has the switch
https://www.amazon.com/gp/product/B006K8V9LA/ref=ppx_od_dt_b_asin_title_s00?ie=UTF8&psc=1
Title: Re: Brake Light Switch
Post by: chetbrz on April 18, 2023, 03:56:31 PM
Quote from: Touring29 on April 17, 2023, 07:24:27 PMBTW Amazon has the switch
https://www.amazon.com/gp/product/B006K8V9LA/ref=ppx_od_dt_b_asin_title_s00?ie=UTF8&psc=1

Thanks, I ordered two.  :)  :)
Title: Re: Brake Light Switch
Post by: imoore on April 29, 2023, 05:21:23 AM
I fitted a mechanical switch to the brake pedal. wasn't happy with the closing pressure setting on the master cylinder switch. Found no lights would illuminate under light braking.
Title: Re: Brake Light Switch
Post by: chetbrz on April 29, 2023, 06:54:34 AM
Very true.

Just curious, how did you mount the switch. 
Title: Re: Brake Light Switch
Post by: imoore on May 03, 2023, 05:31:20 AM
I made a bracket that comes off the pedal stop screw. And use a brake light switch that became the new pedal stop. I can take a photo in a few days.
I should add mine is a RH drive. But should work on LH aswell.