Re: 55 400 instrument performance

Posted by Redhexagon On 2022/8/26 13:53:14

Wires crossed or shorting to ground, perhaps? The gauges ground through their sender units. Lower resistance = higher reading. An ancient wire with compromised insulation can short to ground and cause a high reading. Each gauge used individual wires held in place by nuts, so it's easy to get wires crossed between gauges. That would cause all kinds of funky stuff.

By the way, removing the instrument cluster from these cars SUCKS.

Please don't wrap wires with electrical tape. The adhesive melts into a gooey mess after a short period of time and the tape unravels, leaving the goo behind. Heat-shrinking is far better, as is wrapping the tape with non-adhesive vinyl wrapping tape also known as "plating tape". It's what the OEM's used. I get it from Grainger. Fraying cloth wires can by stabilized by painting them in several coats of liquid electrical tape. Basically, vinyl melted in solvent. It soaks into the cloth and dries into vinyl.