Can be that strap or a heavy like # 6 wire .. it has to be there for many reasons .including starting current and voltage regulator . Idea is ground block to car frame . Or body . Has to be there solidly connected . There is also a cap from the A terminal on the generator for radio noise but you have an alternator . A bad diode in alternator can
Make buzz and show marginal Output with all Lights fan etc on . See alternator check out in FSM .
It can also be the filter caps in the radio are gone . They dry out. Normal end of life for electrolytic caps . There are two sections of caps in the radio . You can try to mimic a good one by getting a 2500 Mfd 25 to 35 volt cap , solidly ground - terminal , put + on radio feed at fuse for radio to avoid pulling radio . Even better at radio power in wire near radio . If it is mostly gone ( the noise ) radio needs new caps. Radio service guy . They filter the 12 DC for the radio .
Hope that helps .. check antenna is tight too that grounds the shield at antenna .
Sent from my iPhone
On Oct 16, 2016, at 3:58 PM, Val Jeffers edward1108@xxxxxxxxx [Chrysler300] <Chrysler300-noreply@xxxxxxxxxxxxxxx> wrote:
Posted by: John Grady <jkg@xxxxxxxxxxxxxxxxx>
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