Alternators
Car Batteries

After getting the alternator on your 1990 Chevy truck tested still won't charge you've checked the battery and the ends all the fuses and connectionsand you've tried grounding the alternator?

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Wiki User
December 08, 2007 7:54PM

Repair or Replace or have the alternator tested off the vehical to try and isolate the trouble. ANSWER Check your wiring including your battery cables. Sometimes cables can look okay but be corroded inside the insulation, especially the ground strap.