Not blowing my own horn . . . literally. '05 Silverado 2500 - Diesel Place : Chevrolet and GMC Diesel Truck Forums
 
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Old 08-16-2015, 04:23 PM   #1 (permalink)
justAL
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Not blowing my own horn . . . literally. '05 Silverado 2500

2005 Silverado HD - 4x4 - Duramax

My horn won't work via the steering wheel pad, however it sounds when I lock the doors with the key fob.

I checked the 15 amp fuse under the hood and the horn relay - both are OK and there seem to be no other electrical gremlins.

Is there another fuse I'm missing?

Thanks,

Al

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Old 08-16-2015, 04:52 PM   #2 (permalink)
Tom S.
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Sounds (sorry, no pun intended) like the pressure switch in the steering wheel is bad or the wiring for it. Does neither side of the wheel work?

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Old 08-16-2015, 05:09 PM   #3 (permalink)
IGO1320
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Possible that the clock spring has gone bad also. Pull the airbag and ck the horn contacts under it first.
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Old 08-24-2015, 09:14 AM   #4 (permalink)
justAL
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Thanks for the replies.

It doesn't work from either side - where do I find this pressure switch?

Will the center pad just pop off?
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Old 08-24-2015, 01:11 PM   #5 (permalink)
96Sub
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horn button

Quote:
Originally Posted by justAL View Post
Thanks for the replies.

It doesn't work from either side - where do I find this pressure switch?

Will the center pad just pop off?

Pressure switch/ contacts are under the pad. No the pad does not just pop off. The trim piece on back (front) of steering wheel needs to be removed first and likely the trim on the steering column too IIRC.
Pad is secured by hidden tabs inside the wheel which must be released from the instrument side of the wheel, pried with a flat screwdriver. Not easy to do the first time, not easy to describe in words either.
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Old 08-24-2015, 01:22 PM   #6 (permalink)
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more horn

Before you remove the steering wheel it may be worthwhile to probe the wire between the relay and the horn button.
Closest location to the steering wheel is at C201 which is located under the steering column near the BCM.
Wire you are looking for is either black or black w yellow stripe.
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2000 Chev Suburban 2500HD LBZ / 6-spd Allison / 4" Magnaflow+Donaldson cat-back / Tripledog tuner/AFE intake / FASS platinum / 275/65-18Yokos / 2" reverse rake body lift / 11.5 rr. /Bilsteins / cop brakes

96Sub K2500 Westers ECU/disabled wastegate /vac pump delete/ 98 airbox/Flowmaster X-over and 3" DP /4" Heartthrob SS quiet exhaust/AutoMeter boost + pyro /FeedtheBeast fuel mod/4.10 10.5 FF axle / GV overdrive/LT265/70-17 BFG on H2 wheels **SOLD**

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Old 08-24-2015, 08:26 PM   #7 (permalink)
IGO1320
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Do not probe or ohm any yellow wires! Those would be airbag!
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2006 2500HD CCSB 4X4 RED LBZ
Spray-In Bed Liner, Air Bags
Custom Reese 20K slider FWH/Gooseneck hitch
265/75/16 Michelin LTX AT2's on PYO's
Duramax.com tow tune w/turbo brake
PPE Dual Fueler (P0087 cure)
Kitty on a "warm shelf", K+N Drop-in filter
Amsoil in all places, Amsoil BMK-27 Bypass
KYB shocks (stock sucked)
Autometer Boost/Pyro gauges/Edge CTS
EGR blocker and (Kennedy) finger stick
Merchant remanufactured transfer case 748,000
Kennedy lift pump, reserve tank with transfer pump
Suncoast trans and 1700 stall converter @ 748,000
14.558 @ 91.03 Hypertech now?????
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Old 08-24-2015, 09:04 PM   #8 (permalink)
96Sub
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Quote:
Originally Posted by IGO1320 View Post
Do not probe or ohm any yellow wires! Those would be airbag!


Agreed, that would be
unwise.
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96Sub K2500 Westers ECU/disabled wastegate /vac pump delete/ 98 airbox/Flowmaster X-over and 3" DP /4" Heartthrob SS quiet exhaust/AutoMeter boost + pyro /FeedtheBeast fuel mod/4.10 10.5 FF axle / GV overdrive/LT265/70-17 BFG on H2 wheels **SOLD**

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Old 08-24-2015, 10:14 PM   #9 (permalink)
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Before you go screwing with the steering wheel, pull the airbag fuse and wait 15 minutes. I disconnected my batteries as well and unhooked the wires for the airbag under the dash. I am not taking any chances with a bomb pointed at my face. Even all the precautions I was still scared when I was removing the center airbag section of the wheel.
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Old 08-25-2015, 08:49 AM   #10 (permalink)
c20elephant
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Here is a good thread with pictures for removing the steering wheel and SIR coil

https://www.dieselplace.com/forum/2715330-post1.html

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