The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 11-19-2014, 01:55 AM   #1
Gregski
Senior Member
 
Gregski's Avatar
 
Join Date: Aug 2014
Location: Sacramento, CA
Posts: 5,192
Gauge Lights Won't Come On - Help Please

74 GMC half ton

headlights come on but gauge lights do not, I pull the headlight switch out twist it left and right and nothing, do it with both no key in ignition and with key in ignition in all sorts of positions, nothing

replaced all six bulbs

replaced all 9 fuses

tested light bulb under dash it is a good one (not related but would want that one to come on too)

removed headlight switch cleaned and rebuilt it (dont know how to test it)

dont know how to test with a multimeter or where to start, which wire is the power for those darn cluster lights?

advice needed
Gregski is offline   Reply With Quote
Old 11-19-2014, 10:41 AM   #2
77K10Silverado
Registered User
 
77K10Silverado's Avatar
 
Join Date: Jul 2014
Location: Winston-Salem, NC
Posts: 563
Re: Gauge Lights Won't Come On - Help Please

Prob a bad printed cluster circuit. I had a bad one that acted like that. Changed it and everything lit up!

http://www.classicparts.com/Wiring-H.../products/368/
77K10Silverado is offline   Reply With Quote
Old 11-19-2014, 10:44 AM   #3
Cabnchassis
Registered User
 
Join Date: Mar 2014
Location: Redwood City
Posts: 239
Re: Gauge Lights Won't Come On - Help Please

Mine has a short or something but will usually come on if i mess with the dimmer a little.
__________________
1991 R3500 3+3 C+C 6.2/4l80e/14ff Fleetside Dually
1992 K2500 ECLB 5.7/4l80e/14sf(g80) 8600gvwr
1991 CR500 (95 Burb wouldn't stop catching fire )
Cabnchassis is offline   Reply With Quote
Old 11-19-2014, 11:41 AM   #4
walkerb
Registered User
 
walkerb's Avatar
 
Join Date: May 2010
Location: Rochester NY
Posts: 831
Re: Gauge Lights Won't Come On - Help Please

I had the same issue. Bad headlight switch. Things worked just had a bunch of corrosion on it.
__________________
1973 k20 Suburban 350
1974 Custom stepside c-10 250
1975 Chevy stepside 454
1986 K30 Crewcab SRW 350
R.I.P- glimmertwin01- board member and good friend, you will be missed
walkerb is offline   Reply With Quote
Old 11-19-2014, 12:26 PM   #5
Gregski
Senior Member
 
Gregski's Avatar
 
Join Date: Aug 2014
Location: Sacramento, CA
Posts: 5,192
Re: Gauge Lights Won't Come On - Help Please

Quote:
Originally Posted by walkerb View Post
I had the same issue. Bad headlight switch. Things worked just had a bunch of corrosion on it.
Thanks, gonna pick one up at AutoZone today for $15 bucks, I was taught long time ago to replace the easy/cheap stuff first, even if it ends up being the printed circuit, that thing is $70 bucks, so hope the switch is it, that would make The Greg happy
Gregski is offline   Reply With Quote
Old 11-19-2014, 12:43 PM   #6
HEADTURNINGC10
Registered User
 
Join Date: Mar 2014
Location: Mechanicsville, Virginia
Posts: 65
Re: Gauge Lights Won't Come On - Help Please

Do your tail tights come on? My brothers truck is currently doing the same thing (1980 gmc sierra) but his marker lights, dash and tail lights arent coming on only the headlights come on when pull out the the switch.
HEADTURNINGC10 is offline   Reply With Quote
Old 11-19-2014, 01:44 PM   #7
Gregski
Senior Member
 
Gregski's Avatar
 
Join Date: Aug 2014
Location: Sacramento, CA
Posts: 5,192
Re: Gauge Lights Won't Come On - Help Please

Quote:
Originally Posted by HEADTURNINGC10 View Post
Do your tail lights come on?
Yes, in my case my tail lights do come on
Gregski is offline   Reply With Quote
Old 11-19-2014, 02:21 PM   #8
Gregski
Senior Member
 
Gregski's Avatar
 
Join Date: Aug 2014
Location: Sacramento, CA
Posts: 5,192
Re: Gauge Lights Won't Come On - Help Please

found this very helpful post

http://67-72chevytrucks.com/vboard/s....php?p=5190913
Gregski is offline   Reply With Quote
Old 11-19-2014, 04:30 PM   #9
Dead Parrot
Registered User
 
Join Date: Aug 2012
Location: Oklahoma City, OK
Posts: 1,076
Re: Gauge Lights Won't Come On - Help Please

Headturning - check the fuses in your bother's truck. Made a 100 mile trip at night thinking just my dash lights were out. Instead, much like your brother's truck, its was dash lights, and all running lights. Brake and turn lights worked, headlights worked as did the dome light. It was a 68 Impala but I am guessing GM didn't change much on the wiring between the two. Replaced the bad fuse, all lights lit again.
Dead Parrot is offline   Reply With Quote
Old 11-20-2014, 03:26 AM   #10
Gregski
Senior Member
 
Gregski's Avatar
 
Join Date: Aug 2014
Location: Sacramento, CA
Posts: 5,192
Re: Gauge Lights Won't Come On - Help Please

after replacing all the light bulbs in the cluster and all 9 fuses in the fuse panel and installing a brand new headlight switch, it was time to yank the printed circuit board

check out my light bulb testing station, a simple 9 volt battery I think is what helped me find the problem...

"just doing the dishes honey, go back to bed!"
Attached Images
    
Gregski is offline   Reply With Quote
Old 11-20-2014, 03:35 AM   #11
Gregski
Senior Member
 
Gregski's Avatar
 
Join Date: Aug 2014
Location: Sacramento, CA
Posts: 5,192
Re: Gauge Lights Won't Come On - Help Please

I honestly think the problem was:

1. dirty filthy cluster, circuit board, connectors

2. the light bulbs have these tiny wires sticking out where they need to make contact with their black sockets, well those wires were too pressed in on the bulbs and the contacts in the sockets were too spread out from years and years of pressure

Solution: I unbent the connections on each light bulb very carefully until they made contact, even had to do that on the brand new bulbs, on some of them I bent the wires in the opposite direction to finally get those bulbs to work

I used electric parts cleaner and dielectric grease in all the bulb sockets
Attached Images
    

Last edited by Gregski; 11-20-2014 at 03:44 AM.
Gregski is offline   Reply With Quote
Old 11-20-2014, 03:42 AM   #12
Gregski
Senior Member
 
Gregski's Avatar
 
Join Date: Aug 2014
Location: Sacramento, CA
Posts: 5,192
Re: Gauge Lights Won't Come On - Help Please

The pictures above show me testing each step of the way, I finished putting it all back together close to midnight so I did not snap any more pictures, I did have more than the four bulbs glowing including the one that is missing in the middle of the cluster which I inserted later on

my advise, is take your time, have a beer, listen to music, work in good lighting, like at your kitchen table, LOL its a labor of love, thanks again for all the advice please check out my Restoring Rusty thread for other progress

http://67-72chevytrucks.com/vboard/s...d.php?t=645440
Gregski is offline   Reply With Quote
Old 11-20-2014, 07:30 AM   #13
walkerb
Registered User
 
walkerb's Avatar
 
Join Date: May 2010
Location: Rochester NY
Posts: 831
Re: Gauge Lights Won't Come On - Help Please

Glad you got it working
__________________
1973 k20 Suburban 350
1974 Custom stepside c-10 250
1975 Chevy stepside 454
1986 K30 Crewcab SRW 350
R.I.P- glimmertwin01- board member and good friend, you will be missed
walkerb is offline   Reply With Quote
Old 11-27-2014, 12:47 AM   #14
swissarmychainsaw
Registered User
 
Join Date: Jun 2009
Location: san francisco, ca (east bay)
Posts: 534
Re: Gauge Lights Won't Come On - Help Please

Quote:
Originally Posted by HEADTURNINGC10 View Post
Do your tail tights come on? My brothers truck is currently doing the same thing (1980 gmc sierra) but his marker lights, dash and tail lights arent coming on only the headlights come on when pull out the the switch.
GM did this on purpose. If you blow your fuse for your tail lights, you'll know it because you dash lights stop working.
Least that's what Dad always said, and he worked there for 30 years!
swissarmychainsaw is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

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

Forum Jump


All times are GMT -4. The time now is 08:38 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2018, vBulletin Solutions Inc.
Copyright 1997-2013 67-72chevytrucks.com