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Fixing the old truck

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#1163681 05/03/2016 9:14 PM
Joined: Jun 2014
Posts: 106
C
Shop Shark
Shop Shark
C Offline
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


~Justin

1937 Chevy 1/2-ton
"Wylburr Clyde"
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My Grandfather bought it new and Dad drove it through highschool. The 3rd & 4th generations put it back on the road on 8/8/2015!
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Posts: 28,674
H
Kettle Custodian (pot stirrer)
Kettle Custodian (pot stirrer)
H Offline
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.


1951 GMC 1 Ton Flatbed -- It is finally on the road and what a great time I have driving it!
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My Chevy Master 4 Door is on the Road!

Moderated by  Jon G, Rusty Rod 

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