HELP!! HVAC fuse blows on left hand turns

N54NOMORE · 08-10-2017, 06:44 PM

So I went to the track this weekend (a road coarse) and halfway through the weekend my HVAC controls just stopped working. I tried a global reset. Didn't work.... Finally discovered my HVAC fuse in the trunk (f14) was blown. I replaced it and went back out on the track and within the first lap the fuse blew again.

Head scratcher for sure.

I am running BMR springs on a MRC M6 car with 285-30-20 fronts and 305-30-20 rears. I did not relocate that harness because I thought that was only required if you ran a 35 series tire.

I brought my car to a buddies dealership today and assumed that it must be a bad module or something. After the tech spent some time on the car he has concluded that he can get the car to blow the fuse every time he makes a hard left turn.

Other than suspension mods I have all bolt ons and a plug and play e85 sensor.

The tech is super cool but the more he looks at it the larger my sinking feeling is that this issue is a me created problem vs a factory problem.

Anyone else have this issue? Any ideas on what I could have the tech check. at this point the sooner he figures it out the better as I think I am footing the bill at this point

thanks

N54NOMORE · 08-11-2017, 10:05 AM

anybody on this?

nancygrl · 08-11-2017, 10:52 AM

on some 2016 SS's there are some wiring harnesses in the engine bay near the compressor that is extremely close to the belt and has caused various problems mostly engine surging, but the wiring for the ac compressor is in that area too, wouldn't hurt to check that area out...At least it's a place to start.

looking for a post where there are photos, once I find it I'll link it.

Found it. http://www.camaro6.com/forums/showth...engine+surging

Hope it helps.

ctrlz · 08-11-2017, 11:02 AM

How is F2 in the rear fuse block? That one is called "front HVAC" in the manual but appears bigger than F14. So I'm wondering if that means it's for the cabin blower. I can't find any fuse labeled cabin blower.
I would also check relay K8 (a/c control) in the engine compartment. If the relay broke there may be metal parts which are shorting when you go around hard turns. If it is shorting the low power contacts it might blow the HVAC control module fuse.

ctrlz · 08-11-2017, 11:04 AM

Quote:

Originally Posted by nancygrl

on some 2016 SS's there is a wiring harness in the engine bay that is extremely close to the belt and has caused problems...looking for a post where there are photos, once I find it I'll link it.

This thread is somewhere in the warranty section. The wires that get affected are for the crank or cam position sensor.

Here you go:
http://www.camaro6.com/forums/showthread.php?t=490819

TECHTURTLE · 08-11-2017, 11:56 AM

Obviously you have a chaffed wire that makes contact with ground in turns... Get a wiring diagram and follow the harness looking for wires that are close to any structure. Black spots are a telltale sign of arcing.

ctrlz · 08-11-2017, 12:19 PM

Quote:

Originally Posted by TECHTURTLE

Obviously you have a chaffed wire that makes contact with ground in turns... Get a wiring diagram and follow the harness looking for wires that are close to any structure. Black spots are a telltale sign of arcing.

Maybe. But I would suspect HVAC low voltage control wiring would be routed closer to the engine compartment sidewalls. No reason to route it near moving parts or heat.

TJay74 · 08-11-2017, 02:51 PM

I would check in the left rear fender well and make sure that the harness in there is not getting rubbed on. Hard left turns would make the top of the left rear tire move inboard and rub the inner fender liner.

My guess is that, and every time you make a hard left turn after you put a new fuse in the fuse block it shorts out the wires again and pops the fuse.

08-10-2017, 06:44 PM	#1
N54NOMORE Drives: 2016 2SS Join Date: Mar 2017 Location: Rogers MN Posts: 19	HELP!! HVAC fuse blows on left hand turns So I went to the track this weekend (a road coarse) and halfway through the weekend my HVAC controls just stopped working. I tried a global reset. Didn't work.... Finally discovered my HVAC fuse in the trunk (f14) was blown. I replaced it and went back out on the track and within the first lap the fuse blew again. Head scratcher for sure. I am running BMR springs on a MRC M6 car with 285-30-20 fronts and 305-30-20 rears. I did not relocate that harness because I thought that was only required if you ran a 35 series tire. I brought my car to a buddies dealership today and assumed that it must be a bad module or something. After the tech spent some time on the car he has concluded that he can get the car to blow the fuse every time he makes a hard left turn. Other than suspension mods I have all bolt ons and a plug and play e85 sensor. The tech is super cool but the more he looks at it the larger my sinking feeling is that this issue is a me created problem vs a factory problem. Anyone else have this issue? Any ideas on what I could have the tech check. at this point the sooner he figures it out the better as I think I am footing the bill at this point thanks

08-11-2017, 10:52 AM	#3
nancygrl 雪の玉 Drives: '22 Z71 RST Silverado Join Date: Feb 2011 Location: South Posts: 3,415	on some 2016 SS's there are some wiring harnesses in the engine bay near the compressor that is extremely close to the belt and has caused various problems mostly engine surging, but the wiring for the ac compressor is in that area too, wouldn't hurt to check that area out...At least it's a place to start. looking for a post where there are photos, once I find it I'll link it. Found it. http://www.camaro6.com/forums/showth...engine+surging Hope it helps. Last edited by nancygrl; 08-11-2017 at 11:06 AM.

08-11-2017, 11:56 AM	#6
TECHTURTLE Drives: 2016 Camaro 2SS Join Date: Dec 2013 Location: OTP Atlanta Posts: 862 View My Garage	Obviously you have a chaffed wire that makes contact with ground in turns... Get a wiring diagram and follow the harness looking for wires that are close to any structure. Black spots are a telltale sign of arcing. __________________ 2016 2SS 6-Speed Manual... Magnetic Ride Control, Dual Mode Exhaust, Sunroof, Adrenaline Red Interior, Mylink W/Navigation Added Edelbrock E-Force Supercharger, GM 1LE Sway Bars, BMR Upper/Lower Trailing Arms, BMR Upper Control Arms. BMR Front/Rear Chassis Braces, BMR Tunnel Brace. GM Red knee Pads, GM Black Front Splitter, GM SEMA Concept Grille, GM Dark Taillights, GM Ground Effects package... Savini Di Forza BM-14 Gloss Black Wheels 9's front, 10's rear.

08-11-2017, 10:05 AM	#2
N54NOMORE Drives: 2016 2SS Join Date: Mar 2017 Location: Rogers MN Posts: 19	anybody on this?

08-11-2017, 11:02 AM	#4
ctrlz Drives: 2017 2SS, 50th pkg, M6, MRC, NPP Join Date: Jan 2016 Location: Ocean City, NJ Posts: 3,559	How is F2 in the rear fuse block? That one is called "front HVAC" in the manual but appears bigger than F14. So I'm wondering if that means it's for the cabin blower. I can't find any fuse labeled cabin blower. I would also check relay K8 (a/c control) in the engine compartment. If the relay broke there may be metal parts which are shorting when you go around hard turns. If it is shorting the low power contacts it might blow the HVAC control module fuse.

08-11-2017, 02:51 PM	#8
TJay74 Drives: 17 Camaro SS 1LE & 16 Sierra AT CC Join Date: Nov 2016 Location: Norman, OK Posts: 2,424	I would check in the left rear fender well and make sure that the harness in there is not getting rubbed on. Hard left turns would make the top of the left rear tire move inboard and rub the inner fender liner. My guess is that, and every time you make a hard left turn after you put a new fuse in the fuse block it shorts out the wires again and pops the fuse.

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