I have no lights on the speedometer nor does the horn work

I f the horn doesn't work I would check the top motor mount just above the horn. That's where the ground for the horn is. If the ground is good, then run a test light from ground to the horn yellow wire. Depress the horn button and if the light comes on then your power side is good. Then run the test light clamp to the battery positive and test the black wire " ground " side . If it lights up then you need a horn. The speedo and the horn are 2 different circuits so I think it's a combination of problems not just one. If the speedo works and the trip works, then I would check the bulb itself.

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