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I have a 1978 Chevy pick up C20 the. Truck is not charging…

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I have a 1978 Chevy...
I have a 1978 Chevy pick up C20 the. Truck is not charging the battery, I purchase'd an alternator and had it check'd its OK, (2) I purchase'd a New battery. I check'd for shorts there are none (3) there are NO blown fuses, but when I remove positive cable as truck is runnuing motor turns off, Any idea's. Nick from L.A..Thanks.
Submitted: 6 months ago.Category: GMC
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Answered in 23 minutes by:
12/26/2017
GMC Mechanic: david craig, Owner/[email protected] 3D Atuomotive replied 6 months ago
david craig
david craig, Owner/[email protected] 3D Atuomotive
Category: GMC
Satisfied Customers: 5,755
Experience: owner/mechanic at 3D Automotive
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Hi my name is ***** ***** I'll be more than happy to assist you. Please allow me a few minutes to review your information. Thank you

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GMC Mechanic: david craig, Owner/[email protected] 3D Atuomotive replied 6 months ago

when you remove the positive cable from the battery while its running, it's going to shut off the vehicle. what do you think is powering everything?

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Customer reply replied 6 months ago
The battery , that why after driving for an hour or so the truck shuts off and will not start again without a jump.
Customer reply replied 6 months ago
Thank You, ***** *****'d rather text.
GMC Mechanic: david craig, Owner/[email protected] 3D Atuomotive replied 6 months ago

whats the battery voltage reading while running?

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Customer reply replied 6 months ago
Its reading 4.3.
GMC Mechanic: david craig, Owner/[email protected] 3D Atuomotive replied 6 months ago

4.3? volts dc?

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Customer reply replied 6 months ago
But I haven't used my volt meter in years am not sure I have it on the right setting. So that reading may not be correct.
GMC Mechanic: david craig, Owner/[email protected] 3D Atuomotive replied 6 months ago

set it on the 20-volt scale for dc volts. put black lead on the negative battery terminal. red lead on positive

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Customer reply replied 6 months ago
Ok
GMC Mechanic: david craig, Owner/[email protected] 3D Atuomotive replied 6 months ago

let me know

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GMC Mechanic: david craig, Owner/[email protected] 3D Atuomotive replied 6 months ago

hows it going?

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