Dashlight Question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

daveo68 · 05-15-2007, 10:03 PM

Installed my dash today. I put new dash tach kit with new circuit board,wiring and all that good stuff. Here is my problem,the right turn signal indicator will not light and the fuel and oil pressure gauge lights will not light up. All the other guage lights work. I've swapped bulbs around and they are all good. Could I have a ground problem or maybe bad connection problem with the bulb holders to circuit board?
Thanks,
Dave

hiridn69gmc · 05-15-2007, 10:09 PM

It could be just a little pinch in the foil runs where it might be cracked. I would, if you have a multimeter or something to test resistance, check to make sure the foil runs are all intact going to the bulbs. You might not even be able to see the crack in it thats there.

**John Fabris** · 05-15-2007, 10:35 PM

I had the the same type of problem with my new dash, only I had it on the shelf for about 4 years before I installed it. During that time, one of the foil in the printed circuit was cracked. Ordered a new printed circuit and was much moe careful handling it during install....

GREASEMONKEY72 · 05-15-2007, 10:40 PM

i 3rd the foil circuit

daveo68 · 05-15-2007, 10:54 PM

I'm starting to think this the problem too. Man, I hate taking that dash back out.
Thanks, guys

hiridn69gmc · 05-15-2007, 10:50 PM

If you have any expirence with a soldering tool and find the crack, if any, you can run a bridge over the foil with another piece of foil if you have the old board or a piece of copper if you have some. You want to keep the same width for continuity, but as a last resort a piece of wire would work too. Make sure to clean the area and cover it with something like epoxy to keep moisture out and it should work fine

Blazer1970 · 05-16-2007, 06:35 AM

If the bulb holders are old, I would suspect them first. They will look just fine visually, but will not make contact with the bulb. It is easy to see if you have power up to the point on the circuit board where the bulb holder makes contact.

byrd · 05-16-2007, 06:40 AM

I would personally check the grounding screws at the top coners of the dash, and if needed put a very thin small washer between the screw and the PCB. You of course will have to take the dash out to do this, but you can also check the PCB while it is out. I personally have never had any trouble with new repop PCB, and I have used several hundered of them, just my .02...Randy

RustyParts · 05-16-2007, 08:33 AM

Also check the little metal tabs on the bottom of the light sockets, they might be corroded and it wouldn't hurt to bend the tabs up a little (towards the foil) so they'll make better contact.

70c10 · 05-16-2007, 10:45 AM

I would bend the little tabs that hold the bulb inward to make them tight. Make sure they are not corroded. I also bend the ears on the socket to make it tight. Pretty common issue. You could always pull a known good socket out and switch it to the one not lighting to verify.

daveo68 · 05-18-2007, 08:41 AM

Thanks for all the info,I'll try to check things out this weekend.

05-15-2007, 10:03 PM	#1
daveo68 Senior Member Join Date: Dec 2001 Location: Lexington,NC Posts: 503	Dashlight Question Installed my dash today. I put new dash tach kit with new circuit board,wiring and all that good stuff. Here is my problem,the right turn signal indicator will not light and the fuel and oil pressure gauge lights will not light up. All the other guage lights work. I've swapped bulbs around and they are all good. Could I have a ground problem or maybe bad connection problem with the bulb holders to circuit board? Thanks, Dave __________________ 68 C-10 Custom LWB 307 V8 Lexington,NC davideowens@lexcominc.net God Bless America

05-15-2007, 10:09 PM	#2
hiridn69gmc Registered User Join Date: Feb 2007 Location: Rochester, MN Posts: 107	Re: Dashlight Question It could be just a little pinch in the foil runs where it might be cracked. I would, if you have a multimeter or something to test resistance, check to make sure the foil runs are all intact going to the bulbs. You might not even be able to see the crack in it thats there. __________________ 1971 Chevy C-10-sold 1969 GMC 4x4-sold 1997 Chevy Z71 2003 Grand Prix

05-15-2007, 10:35 PM	#3
John Fabris TOTY 2006 Join Date: Dec 1999 Location: Magalia CA USA Posts: 2,270	Re: Dashlight Question I had the the same type of problem with my new dash, only I had it on the shelf for about 4 years before I installed it. During that time, one of the foil in the printed circuit was cracked. Ordered a new printed circuit and was much moe careful handling it during install.... __________________ John Fabris 67 C10 SWB

05-15-2007, 10:40 PM	#4
GREASEMONKEY72 Registered User Join Date: Aug 2006 Location: Bakersfield,CA Posts: 7,893	Re: Dashlight Question i 3rd the foil circuit __________________ -steven Alte Seele S.S. "Allison" '72 C/10 LWB 350SB/TH350 - DD PITBULL IS NOT A CRIME

05-15-2007, 10:54 PM	#5
daveo68 Senior Member Join Date: Dec 2001 Location: Lexington,NC Posts: 503	Re: Dashlight Question I'm starting to think this the problem too. Man, I hate taking that dash back out. Thanks, guys __________________ 68 C-10 Custom LWB 307 V8 Lexington,NC davideowens@lexcominc.net God Bless America

05-15-2007, 10:50 PM	#6
hiridn69gmc Registered User Join Date: Feb 2007 Location: Rochester, MN Posts: 107	Re: Dashlight Question If you have any expirence with a soldering tool and find the crack, if any, you can run a bridge over the foil with another piece of foil if you have the old board or a piece of copper if you have some. You want to keep the same width for continuity, but as a last resort a piece of wire would work too. Make sure to clean the area and cover it with something like epoxy to keep moisture out and it should work fine __________________ 1971 Chevy C-10-sold 1969 GMC 4x4-sold 1997 Chevy Z71 2003 Grand Prix

05-16-2007, 06:35 AM	#7
Blazer1970 Registered User Join Date: Dec 1999 Location: Old Mission, MI, USA Posts: 2,510	Re: Dashlight Question If the bulb holders are old, I would suspect them first. They will look just fine visually, but will not make contact with the bulb. It is easy to see if you have power up to the point on the circuit board where the bulb holder makes contact. __________________ Tim

05-16-2007, 08:33 AM	#9
RustyParts Registered User Join Date: May 2006 Location: Wyman, Kentucky Posts: 403	Re: Dashlight Question Also check the little metal tabs on the bottom of the light sockets, they might be corroded and it wouldn't hurt to bend the tabs up a little (towards the foil) so they'll make better contact. __________________ 1972 GMC Jimmy, 4WD, 454 CI, 350 Turbo, 4" lift, 35" tires The math teacher said my son "Bubba" could be a mathmatical genius. cause he's got 13 fingers! Last edited by RustyParts; 05-16-2007 at 08:34 AM.

05-16-2007, 10:45 AM	#10
70c10 67-72 Addict! Join Date: Feb 2002 Location: The TAX State! Posts: 7,857	Re: Dashlight Question I would bend the little tabs that hold the bulb inward to make them tight. Make sure they are not corroded. I also bend the ears on the socket to make it tight. Pretty common issue. You could always pull a known good socket out and switch it to the one not lighting to verify. __________________ Jim 1970 C/10 Fleetside w/Ghost Flames Lowered 4.5" front and 4" rear (Raked) 355/350 Turbo w/shift kit 10" Redneck Performance Verter w/2500 stall Hooker Super Comps part#2808-1 Performer RPM Air-Gap 12 Bolt w/3:73 gears- Eaton Posi Comp Cams XE262 with 1.6 Crane Energizers, Road Demon 625 and Brodix IK 180 heads

05-18-2007, 08:41 AM	#11
daveo68 Senior Member Join Date: Dec 2001 Location: Lexington,NC Posts: 503	Re: Dashlight Question Thanks for all the info,I'll try to check things out this weekend. __________________ 68 C-10 Custom LWB 307 V8 Lexington,NC davideowens@lexcominc.net God Bless America



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