Voltage gauge inop - The 1947 - Present Chevrolet & GMC Truck Message Board Network

JOJABOY · 01-29-2013, 02:50 PM

My volt gauge is at centerline and does not move. Does anyone have any pointers on how to test or repair it?

**Ol Blue K20** · 01-29-2013, 02:58 PM

if it is the stock gauge it is an ammeter. It has two fuses one on each side of the front. They are 4 amp. One on the drivers side is in the corner of fender and rad support and look like tiny black footballs pull apart fuse is inside. Pass side is off the junction block by battery and looks the same. This is what you start with it's usually the problem.

**Stocker** · 01-29-2013, 03:04 PM

^^ Agreed. And it may be working correctly. It normally stays centered. If you watch closely, when you engage the starter it may move slightly to the left indicating battery discharge.... than after the truck starts it may move slightly to the right, indicating a charging condition.

Here's a thread that helps explain the wiring and fuses. http://67-72chevytrucks.com/vboard/s...d.php?t=556345

JOJABOY · 01-29-2013, 03:05 PM

Quote:

Originally Posted by Ol Blue K20

if it is the stock gauge it is an ammeter. It has two fuses one on each side of the front. They are 4 amp. One on the drivers side is in the corner of fender and rad support and look like tiny black footballs pull apart fuse is inside. Pass side is off the junction block by battery and looks the same. This is what you start with it's usually the problem.

Sweet. I just need a place to start looking.

SS Tim · 01-29-2013, 03:10 PM

The gauge is actually an ammeter. It shows, to be basic, flow in and out of the battery. During normal operation low to no charge or discharge it tends to the middle. When a load is applied (like starting) it will tend left showing a discharge. When the alternator is catching up, topping off the battery it will tend right. As the battery gets full and the regulator tapers down it will tend to center again.

To restore function. The first place to start is with the two inline 4A fuses in the front end harness. One is over on the right side by the battery junction block. The other is over on the left near about the regulator. If these are good then there is probably an open somewhere. A look through the factory service manual wiring schematics will show what to look for.

54blackhornet · 01-29-2013, 04:44 PM

Thanks for tip about the fuse's ! Mine is inop also ?
Posted via Mobile Device

01-29-2013, 02:50 PM	#1
JOJABOY Registered User Join Date: Sep 2012 Location: Factory Posts: 681	Voltage gauge inop My volt gauge is at centerline and does not move. Does anyone have any pointers on how to test or repair it?

01-29-2013, 02:58 PM	#2
Ol Blue K20 Proprietor of Dale's Corner Join Date: Nov 2012 Location: Vacaville , CA Posts: 15,994	Re: Voltage gauge inop if it is the stock gauge it is an ammeter. It has two fuses one on each side of the front. They are 4 amp. One on the drivers side is in the corner of fender and rad support and look like tiny black footballs pull apart fuse is inside. Pass side is off the junction block by battery and looks the same. This is what you start with it's usually the problem. __________________ "Some Days Chickens And Some Days Feathers" Dale XNGH ECV Sam Brannan 1004 R.I.P. 67ChevyRedneck R.I.P. Grumpy Old Man

01-29-2013, 03:04 PM	#3
Stocker 20' Daredevil (Ret) Join Date: May 2003 Location: Jefferson State Posts: 13,586	Re: Voltage gauge inop ^^ Agreed. And it may be working correctly. It normally stays centered. If you watch closely, when you engage the starter it may move slightly to the left indicating battery discharge.... than after the truck starts it may move slightly to the right, indicating a charging condition. Here's a thread that helps explain the wiring and fuses. http://67-72chevytrucks.com/vboard/s...d.php?t=556345 __________________ - Mike - 1972 K20 LWB 350/350/205 RIP El Jay

01-29-2013, 03:10 PM	#5
SS Tim Registered User Join Date: Aug 2010 Location: Edwards, CA Posts: 7,503	Re: Voltage gauge inop The gauge is actually an ammeter. It shows, to be basic, flow in and out of the battery. During normal operation low to no charge or discharge it tends to the middle. When a load is applied (like starting) it will tend left showing a discharge. When the alternator is catching up, topping off the battery it will tend right. As the battery gets full and the regulator tapers down it will tend to center again. To restore function. The first place to start is with the two inline 4A fuses in the front end harness. One is over on the right side by the battery junction block. The other is over on the left near about the regulator. If these are good then there is probably an open somewhere. A look through the factory service manual wiring schematics will show what to look for. __________________ Thanks, Tim * VIN/Model Decoders * Power Team Charts (engine/transmission/gear ratio) * Post Your Pickup SPID Blazer SPID Suburban/Panel SPID * RTFM ... Read The Factory Manuals... download 'em here Highlanders Do you have a 1972 Plaid Pickup? Plaid Blazer ** Plaid Suburban

01-29-2013, 04:44 PM	#6
54blackhornet Registered User Join Date: Jul 2008 Location: Eastern Oregon Posts: 2,309	Re: Voltage gauge inop Thanks for tip about the fuse's ! Mine is inop also ? Posted via Mobile Device __________________ 71 C-20 07 Magnum RT AWD



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