Gauge Cluster Puzzle - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Lurayfarmer · 10-12-2015, 06:46 PM

It seemed to me that a number of gauge cluster bulbs were burned out on my Sierra Grande. My speedo and coolant gauge were dimly lit and none of the warning lights or turn signal lights came on. So I squeezed my big hand into the narrow spaces and replaced all the bulbs with tested, fresh 194s. Result is very little extra light and no warning lights, though I did gain the turn signal lights. Fuses are all fine.

Before I invest in a new cluster or circuit board, I'd like to eliminate other possibilities. Ideas?

swamp rat · 10-12-2015, 07:32 PM

Pull the bezel and have a look at the printed circut on the back side before buying a cluster.

**VetteVet** · 10-12-2015, 08:03 PM

Make sure the cluster .is grounded well to the cab as well

Lurayfarmer · 10-12-2015, 09:09 PM

Thanks, I will check the ground issue. The truck's wiring has been seriously tampered with. The black ground lead of the gauge cluster connector had been cut and left dangling under the dash. I tried grounding that lead with a jumper but nothing changed. It does make me suspicious that the wiring may be at fault. On the other hand, the truck was in dry CA for its whole life and the circuit board does seem dry and fragile.

10-12-2015, 06:46 PM	#1
Lurayfarmer Registered User Join Date: Mar 2014 Location: Luray, VA Posts: 73	Gauge Cluster Puzzle It seemed to me that a number of gauge cluster bulbs were burned out on my Sierra Grande. My speedo and coolant gauge were dimly lit and none of the warning lights or turn signal lights came on. So I squeezed my big hand into the narrow spaces and replaced all the bulbs with tested, fresh 194s. Result is very little extra light and no warning lights, though I did gain the turn signal lights. Fuses are all fine. Before I invest in a new cluster or circuit board, I'd like to eliminate other possibilities. Ideas? __________________ Bill Shenandoah Valley of Va 1972 GMC 2500 Sierra Grande 402, Custom Camper Package

10-12-2015, 07:32 PM	#2
swamp rat Registered User Join Date: Oct 2007 Location: Spanaway Posts: 8,451	Re: Gauge Cluster Puzzle Pull the bezel and have a look at the printed circut on the back side before buying a cluster. __________________ Mike. Swamp Rat build thread : http://67-72chevytrucks.com/vboard/s...d.php?t=595019 72 3/4T 4X4 4" BDS Lift 33" BFG's

10-12-2015, 08:03 PM	#3
VetteVet Msgt USAF Ret Join Date: Jan 2005 Location: Kalamazoo, Michigan Posts: 8,718	Re: Gauge Cluster Puzzle Make sure the cluster .is grounded well to the cab as well __________________ VetteVet metallic green 67 stepside 74 corvette convertible 1965 Harley sportster 1995 Harley wide glide Growing old is hell, but it beats the alternative.

10-12-2015, 09:09 PM	#4
Lurayfarmer Registered User Join Date: Mar 2014 Location: Luray, VA Posts: 73	Re: Gauge Cluster Puzzle Thanks, I will check the ground issue. The truck's wiring has been seriously tampered with. The black ground lead of the gauge cluster connector had been cut and left dangling under the dash. I tried grounding that lead with a jumper but nothing changed. It does make me suspicious that the wiring may be at fault. On the other hand, the truck was in dry CA for its whole life and the circuit board does seem dry and fragile. __________________ Bill Shenandoah Valley of Va 1972 GMC 2500 Sierra Grande 402, Custom Camper Package

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