Quote:
Originally Posted by 68 TT
You should take just the alternator to the parts store. They can spin it up on their machine this way and test it properly. On the truck all they can do is check output voltage without being able to put it under load.
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Personally I'd do both, since it is on the truck see what it puts out there, if it is putting out spec on the truck chances are it will on a bench.
The way to load it is to turn on lights, heater or A/C etc. to load the system.
Also, is the belt properly tensioned and in good shape ??, if not when under load it may slip and cause the problem.
Dave
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Dave & Marilyn in Rio Rancho NM....1967 Chevrolet C-10 long step side.....250 3 spd. .....
1968 Chevrolet C-10 long step side.....325 hp 350 4spd.....3" Exhaust....etc.
1965 Chevrolet Suburban K-10....292 4spd....cam....etc.
Bow Tie Baby