Jump to content

Welcome to RennTech.org Community, Guest

There are many great features available to you once you register at RennTech.org
You are free to view posts here, but you must log in to reply to existing posts, or to start your own new topic. Like most online communities, there are costs involved to maintain a site like this - so we encourage our members to donate. All donations go to the costs operating and maintaining this site. We prefer that guests take part in our community and we offer a lot in return to those willing to join our corner of the Porsche world. This site is 99 percent member supported (less than 1 percent comes from advertising) - so please consider an annual donation to keep this site running.

Here are some of the features available - once you register at RennTech.org

  • View Classified Ads
  • DIY Tutorials
  • Porsche TSB Listings (limited)
  • VIN Decoder
  • Special Offers
  • OBD II P-Codes
  • Paint Codes
  • Registry
  • Videos System
  • View Reviews
  • and get rid of this welcome message

It takes just a few minutes to register, and it's FREE

Contributing Members also get these additional benefits:
(you become a Contributing Member by donating money to the operation of this site)

  • No ads - advertisements are removed
  • Access the Contributors Only Forum
  • Contributing Members Only Downloads
  • Send attachments with PMs
  • All image/file storage limits are substantially increased for all Contributing Members
  • Option Codes Lookup
  • VIN Option Lookups (limited)
Sign in to follow this  
nerdtalker

Reverse lights don't work after switch replacement, contact cleaning

Recommended Posts

I noticed a little while ago my reverse lights were not working and with the mirror switch in the right position that the passenger mirror wasn't dropping when in reverse. Fuse B5 checked not blown and the tail light bulbs looked ok, so I figured it was the switch on the transmission (I have a 2002 6MT 996TT). I first cleaned all the contacts on the switch on the transmission, then after that didn't work I replaced the switch since the part is only $20. The old switch tested ok with a DMM after removal, and my situation is unchanged.

 

I guess there's a reverse light relay in the rear compartment where the ECU is. Is that the best next step to check? I thought relays rarely died in these cars.

 

I'm not sure what else to troubleshoot or investigate, other than maybe the wiring harness on the switch which looked a little suspect but nothing major. It looked like one pin had pushed out a bit but I pushed it back into place. Is there somewhere to test the switch wiring inside the cabin and verify that the wiring and switch are working?

Share this post


Link to post
Share on other sites

Just to be sure, take each rear backup bulb out and test it with an ohm meter.

It is a pretty simple circuit - switch, bulb sockets, bulbs, and connectors.

Share this post


Link to post
Share on other sites
21 hours ago, Loren said:

Just to be sure, take each rear backup bulb out and test it with an ohm meter.

It is a pretty simple circuit - switch, bulb sockets, bulbs, and connectors.

Yeah I only visually inspected before, I'll double check with a DMM.

Share this post


Link to post
Share on other sites

You may also want to check with key ON engine OFF, whether pin 1 of the backup switch socket (with the connector removed from the switch) gets 12v.

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Sign in to follow this  

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.