Ok guys and gals I need some help . my truck amp gage is doing some thing I cant under stand .the amp gauge drops when I drive down the road come to a stop it goes up to about 14 volts . with the lights on it drops and does not come back up so I took the truck to the shop and had them to test the batt. and alt. both passed i did replace the belt and spring tension ilder pully and the batt ...now what the alt tooI did check the ground at the batt and alt they are good and clean and thight any one got any ideas ????????
- Thread starter ericy
- Start date
"my truck amp gage is doing some thing I cant under stand"
Well, that's certainly understandable as your truck has a Voltmeter, NOT an ammeter!
Have you had dead battery or weak headlight issues? (I'm guessing NOT.) In other words you are imagining there's a problem where none exists!
That being said, GM is FAMOUS for inaccurate gauges and/or poor instrument panel grounds.
When you turn headlight on,, poor instrument panel grounding allows the ground reference used by the voltmeter to drift "above" true ground, making Voltmeter using that as a reference read low.
Well, that's certainly understandable as your truck has a Voltmeter, NOT an ammeter!
Have you had dead battery or weak headlight issues? (I'm guessing NOT.) In other words you are imagining there's a problem where none exists!
That being said, GM is FAMOUS for inaccurate gauges and/or poor instrument panel grounds.
When you turn headlight on,, poor instrument panel grounding allows the ground reference used by the voltmeter to drift "above" true ground, making Voltmeter using that as a reference read low.
MarkB_MI
Well-known Member
- Location
- Motown USA
Probably a stuck gauge. Put a known good digital multimeter on the battery and compare its voltage readings with the truck's VOLT meter as you turn the lights on and off.
Similar threads
We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.
Copyright © 1997-2024 Yesterday's Tractor Co.
All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.
Yesterday's Tractors - Antique Tractor Headquarters
Website Accessibility Policy