horn

12vcummins59 · Feb 10, 2017

The horn in my 96 2500 isn't working, when I press the button there is a click from the pcm but no horn. What's the problem? Thanks

dudeman2009 · Feb 10, 2017

The horn doesn't interact with the PCM. You're probably hearing the horn relay. Just because it clicks, doesnt mean it works. Try swapping that replay with another. If that doesnt work, test for voltage or use a test lamp at the horn connector.

Come back with your findings.

12vcummins59 · Feb 10, 2017

It's getting voltage to the wires at the horn, I'm thinking I just need to get a new horn

dudeman2009 · Feb 12, 2017

Then get a pair of jumper wires or cables and hook the horn directly to the battery, that will tell you real quick. Not that it applies in every case, but like relays, just because the multimeter reads power doesn't mean that much current can flow. Most digital multimeters have an impedance in the megaohms, they use miniscule amounts of current to tell what the voltage is. Its especially important to keep this in mind when working on vehicles that have lots of salt exposure.

horn

12vcummins59

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dudeman2009

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12vcummins59

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dudeman2009

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