Electrical oddity...
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Lead Driver
Joined: Jul 2009
Posts: 6,477
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From: Sheffield, AL
Electrical oddity...
The alternator in my son's 1984 [4.9L with factory tachometer] failed. He was on his way to my house and called, describing the discharging as witnessed by diminished output of A/C [warm April day in the south], stereo, ammmeter indicating discharge, etc. He mentioned that the tachometer was registering very low. By the time he arrived, the tachometer needle was frozen @ 6000 RPMs and stayed there even after the key was turned off.
We checked all electrical connections and determined the alternator was no longer charging. The battery was charged overnight @ 2 amps and the alternator was rebuilt.
The tachometer still was stuck until driving ~1 mile and at that point, it returned to functioning normally?
Perhaps the malfuntioning of the tachometer was coincidental, but it has never acted up, previously.
We checked all electrical connections and determined the alternator was no longer charging. The battery was charged overnight @ 2 amps and the alternator was rebuilt.
The tachometer still was stuck until driving ~1 mile and at that point, it returned to functioning normally?
Perhaps the malfuntioning of the tachometer was coincidental, but it has never acted up, previously.
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