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I have a 2004 chevy silverado 2500 6.0l. I am having a horn

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Hi i have a 2004...
Hi i have a 2004 chevy silverado 2500 6.0l. I am having a horn and light issue. The customer just had a brake assist module installed for his trailer. Now i have no high beam lights or horn. I have power at the horn relay and high beam light relay but i have no power at the fuses. i can activate the lights and horn at the fuse block and they operate properly. There was a bunch of corrosion under the fuse block so i cleaned that all up but no change. Any advice?
Submitted: 1 year ago.Category: Chevy
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Answered in 1 hour by:
8/30/2016
Chevy Mechanic: Juan Crespo, ASE Certified Technician replied 1 year ago
Juan Crespo
Juan Crespo, ASE Certified Technician
Category: Chevy
Satisfied Customers: 1,529
Experience: A.S.E. Master Technician, Advanced Level, Emissions - Asian, Domestic, & European
Verified

Hi there.

Not quite sure of what the problem is... did the high beams and horn become inoperative as a result of the trailer brakes module, or is this just a coincidence?

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Customer reply replied 1 year ago
that's why i asked you! If i answered that i would be the one getting payed. Right..or wrong? not trying to sound rude
Chevy Mechanic: Juan Crespo, ASE Certified Technician replied 1 year ago

I think you misunderstand... what I meant to ask was were the horn and lights working right before the trailer brake module was installed?

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Chevy Mechanic: Juan Crespo, ASE Certified Technician replied 1 year ago

The reason I'm asking is because the horn has an independent circuit with the relay coil being grounded by the switch on the steering wheel.

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Chevy Mechanic: Juan Crespo, ASE Certified Technician replied 1 year ago

I guess it'll be best if I opt out and let another expert try to help you. Please do not reply until another expert responds or the site will cycle the request back to me.

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Chevy Mechanic: Tool Hut, ASE Certified Technician replied 1 year ago
Tool Hut
Tool Hut, ASE Certified Technician
Category: Chevy
Satisfied Customers: 551
Experience: Owner of a mobile diagnostics company assisting auto technicians with difficult vehicles
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Hi, My Name is ***** ***** for posting your question to just answer. I am a independent contractor for just answer, and ASE Certified Master Auto Technician with 20 years experience. I am confident we can resolve your problem together.Please remember I don't know your skill level. I can't see, smell, hear, or touch the vehicle. It may take a few back and forth replies to get to a satisfactory resolution.There will probably be some equipment needed for a proper diagnosis. If you are not comfortable with this or do not have any test equipment please let me know ASAP. I also try to give all of the information you may need expecting a positive rating. I am not compensated for my time until you leave a positive rating. Your rating should be based on the service you received.

there is a ground on the left side lower beside the radiator. Check the ground first.

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Chevy Mechanic: Tool Hut, ASE Certified Technician replied 1 year ago

If you flash the high beams do you get an indicator on the dash?

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Customer reply replied 1 year ago
i do on the dash
Chevy Mechanic: Tool Hut, ASE Certified Technician replied 1 year ago

Which fuses do you not have power at?

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Chevy Mechanic: Tool Hut, ASE Certified Technician replied 1 year ago

Hello, I have not heard from you in a few days. Do you still need assistance? I also noticed you haven't left a rating. I have assisted in good faith and am only compensated when you leave a positive rating. Please let me know if there is anything else you need to leave a positive rating. Conversations can always continue after a rating is received.

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Tool Hut
Tool Hut
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