Pelican Parts
Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help



Go Back   Pelican Parts Forums > Porsche Forums > Porsche 928 Technical Forum


Reply
 
LinkBack Thread Tools Rate Thread
Author
Thread Post New Thread    Reply
Registered
 
Join Date: May 2009
Posts: 12
Porsche Crest Reoccurring Brake Light Problem

I am the owner of a black 1982 928 with a 5 speed at around 95,000 miles. After noticing my brake lights were out the first problem found was that the connector to the rear brake light switch located on the master cylinder had somehow worked its way loose. After plugging the switch back in my brake lights worked fine for a day or two. My stop lamp light on my dash lit up again and no brake lights. I then proceeded to replace the rear brake light switch itself which looked a bit dirty to fix my brake light problem once again for about a week without a problem. Today on a hot day, my central warning light started flashing along with brake pressure warning on my instrument cluster. My brakes seem to be fine, the owners manual states a flashing brake pressure light means one of the circuits in the brake system has failed. My brake lights do not work unless i am pushing the brake pedal hard close to the floor. electrical aspects of the car such as turn signals, reverse lights, tail lights, window wipers, headlights all work great. i have tested fuses. i will start with one question:

How do i diagnose a problem such as this and where do i start?


Last edited by bradley928; 06-18-2009 at 07:11 PM.. Reason: need model info
Old 06-18-2009, 07:09 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #1 (permalink)
Moderator
 
MPDano's Avatar
 
Join Date: Dec 2007
Location: Sunny San Diego
Posts: 9,025
Garage
Sounds like rjm65 and you had the same problem. He replaced his switches and the problem went away. Bad switches my man.
__________________
1981 Porsche 928 "Euro" Auto Gunsmoke Metallic Flat - Black Interior
1983 Porsche 928S "US" Auto Light Bronze (Copper) Metallic - Brown Interior **SOLD**
Old 06-18-2009, 07:26 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #2 (permalink)
Petie3rd
 
Mrmerlin's Avatar
 
Join Date: Jul 2000
Location: Philly PA
Posts: 4,528
Send a message via Yahoo to Mrmerlin
usually if you replace one of the switch on the master you do them both
__________________
^^^ Stan ^^^ 2019 BMW K1250 GS 2016 HD RK
1988 S4 Auto , Elfenbein Perlglanz, Pearl Gray
1982 5sp Met black and tan sport seats
Old 06-18-2009, 08:11 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #3 (permalink)
Moderator
 
MPDano's Avatar
 
Join Date: Dec 2007
Location: Sunny San Diego
Posts: 9,025
Garage
Yeah, from what I heard, they are hard to get to, so replacing both is good advice.
__________________
1981 Porsche 928 "Euro" Auto Gunsmoke Metallic Flat - Black Interior
1983 Porsche 928S "US" Auto Light Bronze (Copper) Metallic - Brown Interior **SOLD**
Old 06-19-2009, 05:39 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #4 (permalink)
Registered
 
vdubr928's Avatar
 
Join Date: May 2009
Location: Colorado Springs, CO
Posts: 721
Did you bleed well? Could be air in the system.
Old 06-19-2009, 05:27 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #5 (permalink)
Registered
 
Join Date: May 2009
Posts: 12
bleeding

when replacing brake switches, is bleeding the brakes required?

Old 06-20-2009, 11:06 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #6 (permalink)
 
Reply


 


All times are GMT -8. The time now is 07:52 PM.


 
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2025, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2025 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page
 

DTO Garage Plus vBulletin Plugins by Drive Thru Online, Inc.