My 90 Aero was showing a drop in voltage some time ago, I tlked to a Ford shop and they pointed me to the ground cable. The ground cable insulation was cracked and some had come off. Old school thinking, I said that I did not think that it made a differance, ground is ground. But with newer computer controls it Does make a differance, ran a new ground cable and out put on the gage came bacd to normal.
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Allen D
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64 Galaxie 500 with 428 FE
66 F-100 4x4 With 67 GT 390 Hi Pro and Toyota Power Steering
67 F-100 2wd for parts
68 F350 crew truck
80 Bronco with a 460 engine
90 Aerostar With 4.0
91 Aero 4x4 with 4.0
93 SHO Taurus
07 Mustang with 4.0
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