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10-14-2002, 10:50 AM
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#1 |
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Registered User
Join Date: Oct 2002
Location: Fair Oaks Ca
Posts: 2
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charging problems
I need electrical help,a 72 c10 350.I cannot find the reason that my alternator work work it bench tests at 15.5 amps and has a new voltage regulator new battery and cables,I have checked the wires to the regulator and the firewall and all seem to have good continuity any suggestions would be a great help.
Thanks Mike |
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10-14-2002, 12:35 PM
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#2 |
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Senior Member
Join Date: Jul 2001
Location: Muskegon,MI,USA
Posts: 6,026
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Welcome from MI!
How are you checking the output when it is on your truck? Jim |
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10-14-2002, 03:49 PM
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#3 |
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Registered User
Join Date: Oct 2002
Location: Fair Oaks Ca
Posts: 2
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first we "bench" tested the alternator at Auto Zone and then i had it tested at an auto shop.For output and the charging system.The alternator is ok on the bench but in the rtruck there is nothing i just replaced the groundong straps and am now really at a loss.Any ideas?
Mike |
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10-14-2002, 08:13 PM
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#4 |
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Registered User
Join Date: Apr 2000
Location: Chester County PA, USA
Posts: 1,228
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Does it have 14.2 volts at the battery when running? If not the regulator is bad or needs adjusted. Take the cover off and turn the phillips head screw until you get 14.2 volts. Also the new voltage regulators suck. You cant adjust them and i had one go bad in 2 days. I converted all my trucks to internal regulator alternators. Hope this helps
Randy 
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72 k/10 short wideside 72 k/5 Blazer 72 K/5 Blazer - obstacle course racer 72 custom/10 8' bed 70 K/5 Blazer 67 C-30 GMC Flat bed 86 GMC K2500 Plow Truck 85 GMC K3500 84 M1008 85 M1008 77 G30 Motor Home 72 Sears 12hp Tractor Glenmoore, Pennsylvania |
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10-14-2002, 10:34 PM
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#5 |
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Registered User
Join Date: Apr 2002
Location: Longmont, CO
Posts: 436
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Don't you just love when things test okay on the bench, but not in the truck? More than likely it's your regulator like oldchev4x4 said, and I don't know if this would apply to a chevy style alternator, but I had similar problems with some mopar alternators where they would test fine out, but not in. Turned out that when I would tighten the mounting bolt, it would flex the case slightly causing it not to work.
Just my nickel's worth...
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------------------------------------------------ I say it's only money, my wife says it's only a truck.... '71 C10 Deluxe, factory ac, ps, pb, should be done by 2102 Longmont, CO husker95@hotmail.com |
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