Need horn help

Jfmarkham · Post by **Jfmarkham** » Thu Mar 21, 2019 10:35 am

I have been having horn problems for two years it has low rpm,s and sometimes didn't work at all,two years ago sent it for testing and fixing got it back same problem last fall sent it to what was supposed to be the best horn shop around got it back during winter took it into the shop and tried it directly on battery worked good high rpm,s good and loud. Today put it it car same old problem if I run a jumper from battery to horn works great but not when using wiring harness, got six volts at switch terminals and at wiring terminals, took switch button off and tried crossing there with test lead same problem, it must be wiring harness? It all looks good and I'm crossing a terminal at switch that reads six volts with meter can't figure this out

Post by **RajoRacer** » Thu Mar 21, 2019 10:38 am

Bad ground ???

Scott_Conger · Post by **Scott_Conger** » Thu Mar 21, 2019 10:39 am

You don't have a horn problem. You have a wiring problem. Somewhere there likely is a loose connection which gets hot and will not carry current. Just because 6V shows up on a wire doesn't mean it is capable of carrying current when under load. Fix the wiring.

Jfmarkham · Post by **Jfmarkham** » Thu Mar 21, 2019 10:48 am

I figured it out when I was using a test lead and closing the circuit I only had the button removed wires were still hooked to back section of switch I removed wires totally from switch and touched them together and it works great need new switch

Post by **DanTreace** » Thu Mar 21, 2019 10:50 am

May have weak battery too.

Best test is engine running at road speed of about 15-20mph, that pumps the volts from the generator too into the horn.

The horn ground as posted should be bright and tight, and the + terminal on that battery horn should be to the first nearest the motor, the # 1 terminal on the terminal block, that is the yellow/black wires, direct from the generator.