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Discussion Starter · #1 · (Edited)
Hey all. When the horn is sounded on the Sonoma, the right turn signal light on the dash comes on. Bad ground? Has anyone had this problem? Thanks馃憤

Edit: Oops, wrong thread : P
 

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The horns are usually grounded by being bolted to a metal part of the vehicle. Could be corroded under the bolt. Why you're getting feedback thru the turn signals is beyond me. Maybe you have a ground strap off somewhere? Back of the head to the firewall strap?
 

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I am not an expert here, but voltage injection may help you trace the leg of the circuit causing the malfunction while having junctions unplugged to narrow things down by process of elimination. You may be able to unplug the horn so you're not driving yourself crazy and just use the steering wheel horn button itself as a means to feed the circuit while diagnosing it (how the current is moving the direction it's moving).
 
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