What could cause a Volvo A25C to lose all lights and the tach at the same time? What could cause a Volvo A25C to lose all lights and the tach at the s

Kizzy Klozenberg

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I'm working on a Volvo A25C and currently have no headlights, tail lights, brake lights, interior lights, or tachometer working. The machine runs, but it seems like everything related to the electrical side stopped at once.

I'm trying to figure out the best place to start checking before tearing too deep into the wiring harness. Thinking maybe a blown fuse, bad ground, relay, or power supply issue, but I'm not very familiar with these trucks yet. Any advice from someone who has dealt with this on an A25C would really help.
 
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