No Power at Dimmer Switch - Blown Tail Light Fuse and Failed Dimmer Rheostat

Electricalbeginner✓ OP Confirmed

Problem

No power reaching the female side of the dimmer switch connector, resulting in loss of exterior lights and gauge illumination. Brake lights still functioned but were back-feeding power through dual-filament 1157 bulbs to other lighting circuits.

No power at dimmer switch connectorExterior tail lights not workingGauge/instrument lights not workingBrake lights still functionalSome lights flickering on only when brake pedal depressed

Root Cause

The 15 amp tail light fuse had blown, likely caused by exposed/uninsulated wire splices on a replacement glove box light socket shorting out. The dimmer switch (rheostat) was also blown, which prevented gauge lights from working even after the fuse was replaced.

Confidence

High confidence — Original poster confirmed this resolved the issue

View Original Thread →Posted October 2021 on SupraForums.com