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73-87 Chevy _ GMC Trucks => Electrical => Topic started by: 1987copper..v10 on January 11, 2024, 06:26:55 PM
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1987 v10 dome light, horn not working. I've got hot going to dome and checks out fine, ran continuity with multimeter on ground, and get a decent reading, assuming i'm reading multimeter correctly. I thought ground(orange/white running to dome) may be corroded running through door threshold, so I cut it by fuse box, pushed on horn...and nothing, so i assume that ground is fine....Checked ground cluster behind instrument panel, detatched , inspected connections, everything looks fine, no corrosion.... checked door/dome light switch on driver side, looks perfect
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Are you sure the dome lamp bulb is good? Orange is B+, white is switched ground. Reconnect the wires that you cut. Probe the orange wire using a test light clipped to ground to verify battery voltage. Then jump the white wire directly to a shiny clean bare metal ground. Does the dome lamp illuminate?
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I had this same exact problem about 15 years ago on my 85. I think it was a fuse, caused by a bad ground. Check your fuses. Clean the ground on the left rear tail light. It didn't make sense that it was all connected.
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Bulb is good...orange is good, fuse is good, I think the ground is ony half good, or half bad, haven't worked on it yet... thanks for the replies, I'll update once I get a chance to work on it.