Go Back   Truck Forums > Chevrolet/GMC Truck Forums > Chevy Silverado/ GMC Sierra Forum
Sign in using an external account
Register Forgot Password?
Search

Reply
 
 
 
 
LinkBack Thread Tools Search this Thread
  #1  
Old 06-11-2010, 10:49 PM
Junior Member
 
Join Date: Jun 2010
Location: Sacramento, CA
Posts: 10
Question Stumped! - brake lights won't work, but bulbs are good?? Advice/help please

I have a 1989 GMC Sierra c2500. When I press on the brake pedal, my brake lights do not come on. At first I thought the bulbs were burnt out, but when I took the bulb out and tested it with electricity it lit up just fine. My hazard lights use the same bulbs as the brake lights and my hazard lights work just fine. My turn signals work great too. But when I step on the brake pedal, I get no brake lights. I have replaced the brake switch under the dash. I have also replaced the neutral safety switch under the dash too, checked the fuses to make sure they were in good condition, and still nothing. What else could I be overlooking and or what else could be the problem?? Any help or advice would be greatly appreciated.

Thank you,
Brady James
This ad is not displayed to registered members.
Register your free account today and become a member on Truckforums!
Reply With Quote
  #2  
Old 06-13-2010, 12:21 AM
seejgo2's Avatar
Member
 
Join Date: Jun 2010
Location: North Bay ON., Canada
Posts: 43
Default

try working your way back with a test light and see what if you can find a broken wire somewhere.
__________________
1987 Chev Short Box 2wd 4 spd standard
1999 Chev Tahoe 4x4 4dr
2007 GMC Yukon XL 4x4
1986 Chev Wrangler 2d 3/4 ton for parts
1968 Pontiac Catalina (42000 Miles my first baby)
Reply With Quote
  #3  
Old 06-13-2010, 09:02 AM
RUFFNECK4LYFE's Avatar
Toyota, Nissan, and Other Truck Forum Moderator
 
Join Date: May 2009
Location: West Texas
Posts: 1,845
Default

Look at the wiring under the rear bumper possibly from the hitch to hook up trailer lights, if you have one.
__________________
That way you'll Learn!!!!
Reply With Quote
  #4  
Old 06-13-2010, 10:38 AM
chrisbmo2000's Avatar
General Truck/Classifieds Forum Moderator
 
Join Date: Jan 2009
Location: Columbia, Mo
Posts: 984
Default

Also brake light switch wires run up to the turn signal switch and then back out.....also do you have power going into and out of the brake light switch?....also CHECK FUSES!!!!! it sounds stupid but you would be surprised...most trucks have a stop light fuse or relay in them....and a combination stop/turn fuse....check for these you may find an easy fix.
__________________
CHRIS
97 Suburban
Descreened MAF
Turned up EPC
Blacked out Grill
New Motor
Tranny built for pulling
My Photos
http://s561.photobucket.com/albums/ss55/chrisbmo2000/

10/23/10 Believe it!!! Mizzou beat Oklahoma
Check out the Truck of the month, nominate and VOTE !!!!!!!!
PM me or any of the other Moderators if you need anything
Reply With Quote
  #5  
Old 06-15-2010, 10:11 AM
Senior Member
 
Join Date: Jan 2010
Posts: 124
Default

I agree w/ RoughNeck
Reply With Quote
  #6  
Old 06-15-2010, 01:47 PM
Mr_Shamrock's Avatar
Chevrolet/GMC, Racing, Recreational Forum Moderator
 
Join Date: Apr 2009
Posts: 2,267
Default

Also the brake light switches on those trucks are adjustable. Make sure it is adjusted properly.
__________________
2003 Chevrolet Tahoe 4X4 5.3
2002 Chevrolet 2500HD 4X4 8.1 - BlackBear Tuned

Reply With Quote
  #7  
Old 06-15-2010, 06:03 PM
chrisbmo2000's Avatar
General Truck/Classifieds Forum Moderator
 
Join Date: Jan 2009
Location: Columbia, Mo
Posts: 984
Default

Quote:
Originally Posted by Mr_Shamrock View Post
Also the brake light switches on those trucks are adjustable. Make sure it is adjusted properly.
Thats right!!!!!! I forgot about that little bit of info.....been awhile since I owned an 80's chevy truck........also I have some wiring diagrams if you need help with those.
__________________
CHRIS
97 Suburban
Descreened MAF
Turned up EPC
Blacked out Grill
New Motor
Tranny built for pulling
My Photos
http://s561.photobucket.com/albums/ss55/chrisbmo2000/

10/23/10 Believe it!!! Mizzou beat Oklahoma
Check out the Truck of the month, nominate and VOTE !!!!!!!!
PM me or any of the other Moderators if you need anything
Reply With Quote
  #8  
Old 06-16-2010, 03:40 PM
Junior Member
 
Join Date: Jun 2010
Location: Sacramento, CA
Posts: 10
Default

Thanks everyone for all your suggestions and help. I was unable to trace a broken wire, but what I was able to do to temporarily fix the problem was put a jumper wire in the brake light switch from orange to red. I used a volt meter to make sure the brake light switch was getting power and the reading was positive... so I'm not sure why or how it won't work by itself because it's a brand new brake light switch. But with the jumper wire in there my brake lights work perfect.
Reply With Quote
  #9  
Old 06-16-2010, 06:37 PM
RUFFNECK4LYFE's Avatar
Toyota, Nissan, and Other Truck Forum Moderator
 
Join Date: May 2009
Location: West Texas
Posts: 1,845
Default

Good deal!
__________________
That way you'll Learn!!!!
Reply With Quote
  #10  
Old 06-16-2010, 09:04 PM
Junior Member
 
Join Date: Jun 2010
Posts: 7
Default

If you have the circuit boards in the tail light(behind the lense) it may have fryed easy fix really and mimimal cost
Reply With Quote
Old 06-16-2010, 09:04 PM
 
 
 
Reply



Tags
99, brake, chevy, dodge, dont, forum, gmc, light, lights, lites, sierra, stop, tail, truck, wont, work

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not 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


Advertising

Featured Sponsors
Vendor Directory

Our Sponsors
Advertising
All times are GMT -5. The time now is 06:36 AM.

Internet Brands, Inc.



SEO by vBSEO ©2010, Crawlability, Inc.