Reverse Lights not Working - LS1LT1 Forum : LT1, LS1, Camaro, Firebird, Trans Am, Engine Tech Forums
 
LinkBack Thread Tools
post #1 of 5 (permalink) Old 09-18-2019, 12:32 PM Thread Starter
Regular Member
 
Join Date: Sep 2018
Posts: 5
 
Reverse Lights not Working

Hi All,

I have a stock 6-speed T-56 in my 1994 Trans am and my reverse lights have stopped working. I checked the bulbs and fuses and all is fine.

I swapped out the transmission fluid and replaced the back-up switch at the same time. I cleaned the harness and tested them again. The lights still don't work.

After I swapped the switch, if I gently wiggle the gearshift, the lights would flash on for a fraction of a second, but that's stopped now and they don't work at all.

Any thoughts? Bent fork maybe?
TMeister is offline  
Sponsored Links
Advertisement
 
post #2 of 5 (permalink) Old 09-18-2019, 06:58 PM
Global Moderator
 
cocobolo95's Avatar
 
Join Date: Sep 2008
Location: Fruitland Park,Florida
Posts: 12,875
 
Disconnect connector at back up light switch. With ignition on, use your multimeter or test light to make sure you have battery voltage on brown wire of connector. If no, you have a wiring,problem or problem with connector C230. Will have brown wire there also @ cavity H of connector.

Connector C230 is located under right side of dash behind kick panel. If you have power to brown wire at back up switch connector, use a jumper to connect to side of connector which goes to back up light. That would be terminal that has the light green wire. This will test wiring, connector C400 and splice S405. If back up lights come on, all is well between back up switch and lights.

If lights don't come on when jumped, you have problem with light green wires, Connector C400, or Splice S405. C400 is bolted to hatch release bracket at back of car. It has 3 wires & 2 ring terminals. S405 is located in rear body harness, approx 5 inches back from grommet p400, which is back up wire grommet.

If all is good with wiring, connectors, splices, this leaves the back up light switch as being possibly defective. Remove switch from trans. I assume that you will lose some fluid. So have a clean pan to catch fluid. I've never looked at a t56 back up sw, so I will assume side of switch that goes into trans has a button that gets pushed or pulled by trans shift forks.

For this test use your multimeter set to ohms. When switch is in normal position, there will be no continuity between leads where connector hooks up. When switch is pushed or pulled, depending on what you have, you should get continuity between the 2 leads of switch. If no continuity, your new switch is bad. If switch has continuity, & all other tests proved wiring & other things are good, then you can look to trans for problem.

You can get 94 service manual at following link. My Files
Back up light wiring diagram starts on page 8A-112-0


Also t-56 service manual at shbox.com

Last edited by cocobolo95; 09-19-2019 at 11:51 AM.
cocobolo95 is offline  
post #3 of 5 (permalink) Old 09-19-2019, 09:04 AM Thread Starter
Regular Member
 
Join Date: Sep 2018
Posts: 5
 
Thanks cocobolo95! I'll work through these this weekend! Much appreciated.
TMeister is offline  
Sponsored Links
Advertisement
 
post #4 of 5 (permalink) Old 09-19-2019, 11:49 AM
Global Moderator
 
cocobolo95's Avatar
 
Join Date: Sep 2008
Location: Fruitland Park,Florida
Posts: 12,875
 
I made a correction in my original post. Follow the directions as they are now.
cocobolo95 is offline  
post #5 of 5 (permalink) Old 09-25-2019, 05:57 PM
Regular Member
 
JLYHT's Avatar
 
Join Date: Sep 2011
Location: St. Louis
Posts: 12
 
Had a similar with my 95 TA. It would blow the fuse. Jumped the wire and the lights worked fine with
no fuse blown. Replace with master pro brand worked for a while (years) then same issue returned. Replaced with Rockauto AC Delco no problems since.


1995 Trans Am
No cat and Flowmaster.
JLYHT is offline  
Sponsored Links
Advertisement
 
Reply

Bookmarks

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the LS1LT1 Forum : LT1, LS1, Camaro, Firebird, Trans Am, Engine Tech Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome