Impala horn wire melted!!!! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

pointbreak · 06-09-2018, 05:16 AM

Hey, so I was working on the horn for my car( I know it's not my truck but im not actually a member of any other forums) it's a 66 Impala. Anyways I'm getting her ready for inspection cuz I need that after 3 years of working on her. I'm putting in the new horn and I just hook up power and go to test it when suddenly Smoke!!!! Oh panicked. Pulled the neg cable off the battery and investigate. It smoked the horn wire from the steering wheel to where it joins the main harness. From the looks of it no other wires were damaged. Not even on the column harness. I'm racking my brain trying to figure out what could cause that to that extent. Any ideas?

pointbreak · 06-09-2018, 05:23 AM

Luckily, I pulled all tbebtape off the main harness, and the horn wire is the only one that got damaged....phew!

**mongocanfly** · 06-09-2018, 07:54 AM

sounds like it was shorted out somewhere...lucky you didn't melt the harness

pointbreak · 06-09-2018, 08:43 PM

No doubt! Real lucky. I get that it shorted out. But im having trouble figuring out why. Harness is all new. New plusg, new horn assembly. Just blows my mind lol.

I'm thinking it had to be in the wheel though. Because that's where the damage is centralized. Also everything else was plugged in and I had run the car a zillion times. But it happened as soon as I plugged the new horn in and hooked up the battery

franken · 06-10-2018, 04:31 PM

New harnesses need to be checked with a low current source of power to avoid this situation. Sounds like the new underdash harness is wired incorrectly. That's my best guess.
The horn button provides a ground to the horn relay, which powers the horn.

**Clyde65** · 06-10-2018, 10:13 PM

Where did you get the harness??

06-09-2018, 05:16 AM	#1
pointbreak Registered User Join Date: Jun 2014 Location: Van island BC Posts: 41	Impala horn wire melted!!!! Hey, so I was working on the horn for my car( I know it's not my truck but im not actually a member of any other forums) it's a 66 Impala. Anyways I'm getting her ready for inspection cuz I need that after 3 years of working on her. I'm putting in the new horn and I just hook up power and go to test it when suddenly Smoke!!!! Oh panicked. Pulled the neg cable off the battery and investigate. It smoked the horn wire from the steering wheel to where it joins the main harness. From the looks of it no other wires were damaged. Not even on the column harness. I'm racking my brain trying to figure out what could cause that to that extent. Any ideas? __________________ Acknowledge and move on 1976 Chevy Silverado 454BBC 1966 Chevy Impala 4 Door Hardtop

06-09-2018, 05:23 AM	#2
pointbreak Registered User Join Date: Jun 2014 Location: Van island BC Posts: 41	Re: Impala horn wire melted!!!! Luckily, I pulled all tbebtape off the main harness, and the horn wire is the only one that got damaged....phew! __________________ Acknowledge and move on 1976 Chevy Silverado 454BBC 1966 Chevy Impala 4 Door Hardtop

06-09-2018, 07:54 AM	#3
mongocanfly Post Whore Join Date: May 2015 Location: Alabama Posts: 14,670	Re: Impala horn wire melted!!!! sounds like it was shorted out somewhere...lucky you didn't melt the harness __________________ Mongo...aka Greg RIP Dad RIP Jesse 1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598 Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334 Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563 2023 Chevy Z71..daily driver

06-09-2018, 08:43 PM	#4
pointbreak Registered User Join Date: Jun 2014 Location: Van island BC Posts: 41	Re: Impala horn wire melted!!!! No doubt! Real lucky. I get that it shorted out. But im having trouble figuring out why. Harness is all new. New plusg, new horn assembly. Just blows my mind lol. I'm thinking it had to be in the wheel though. Because that's where the damage is centralized. Also everything else was plugged in and I had run the car a zillion times. But it happened as soon as I plugged the new horn in and hooked up the battery __________________ Acknowledge and move on 1976 Chevy Silverado 454BBC 1966 Chevy Impala 4 Door Hardtop

06-10-2018, 04:31 PM	#5
franken Registered User Join Date: Jun 2013 Location: Somewhere Posts: 3,122	Re: Impala horn wire melted!!!! New harnesses need to be checked with a low current source of power to avoid this situation. Sounds like the new underdash harness is wired incorrectly. That's my best guess. The horn button provides a ground to the horn relay, which powers the horn.

06-10-2018, 10:13 PM	#6
Clyde65 1965 Chevy C10, 2005 4.8L/4l60 Join Date: Aug 2004 Location: DFW Texas Posts: 8,546	Re: Impala horn wire melted!!!! Where did you get the harness?? __________________ Clyde65 Rebuild of Clyde http://67-72chevytrucks.com/vboard/s...84#post8338184 69 Aristocrat Lo Liner build http://67-72chevytrucks.com/vboard/s...84#post7561684 *support our troops!*



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