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Jul 21st, 2025 | | | | Joined: Jun 2014 Posts: 106 Shop Shark | | Shop Shark Joined: Jun 2014 Posts: 106 | I'm looking for some help on the next steps for troubleshooting.
'37 Chevy 1/2T
Ammeter was always showing above 0 bouncing around and seemed to dip (left) with headlights and / or brake lights illuminated.
Now the meter reads straight up zero with the vehicle running. It will dip (left) with above lights as well. Truck off the gauges falls completely left.
After charging the battery fully, I started the truck and measured 6.5 - 6.7 VDC at the output of the regulator.
Where should I go next?
Thanks,
Justin | | | | | Joined: Feb 2004 Posts: 28,674 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 28,674 | Disconnect the wires at the back of the ammeter, being sure to label which wires go to which post. (Take a picture if possible) The meter needle should go to center. If not, you have troubles inside the meter. Repair or replace it. If it does center, reconnect the wire from the starter connection battery cable. Again, the meter should stay centered. If it's wired right, that should be the only wire attached to that post of the ammeter. Reconnect the other wires one at a time. If one is shorted, or has a high-resistance voltage leak, the meter will deflect when the leaky wire is connected.
I'm going to guess you have an internal problem in the ammeter.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
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| | | | | Joined: Mar 2002 Posts: 9,112 'Bolter | | 'Bolter Joined: Mar 2002 Posts: 9,112 | Your voltage at the regulator indicates it is not charging at that point. | | |
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