Electrical problem after Header install?

[Erbby325]

have a 2009 G8 gt put on Kooks lt 1 7/8 headers with no cats, when started the car up and let it run for a minute the horn started going off by itself, but it sounded almost dead, and when i lock the car makes the same noise and when i honk as welll, and when i try to auto start my car the alarm goes off. anybody????

[STL_G8GT]

Ground points on the block? Wire shorting against hot primaries?

[Erbby325]

Didnt remove any grounds on the block and checked all wires for clearence


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[Napalm]

so let me make sure I read the conditions right.

1) honking horn with car off - using button on steering wheel, hood closed - makes weak sound
2) honk confirmation when locking car hood closed - makes weak sound
3 car won't remote start at all - is there an engine light?

any other conditions

I would start by oddly checking the wire harness to the horn module - it's up front next to the battery + post - if I recall correctly. check the module and it's harness for damange and wires touching.

I'd check your hood pin/hood sensor for the security system it might have moved, broken etc.

as dude above said - check the engine ground. you might not think it's touching a header - and it might not be, but it could still be damaged. check it's bolt is good and clean, and good and tight.

then check the fuse/mains relay box and it's wires under neath. IE take it's mount bolt free and pick it up a but and give it a good look over.

check the fuses in that box and in the driver's side kick panel

finally check cold battery voltage - IE car is off and has been off for a while - doors closed - alarm off - voltage at battery terminals. then just for grins - check voltage at the underhood + terminal and body ground. Come to think of it - do all of this first.

[Erbby325]

no check engine light on, think it may be a bad horn or somthing or loose ground on it the two connections to it are loose and no matter what i do it still sounds like a clown horn

[Napalm]

OH.

have you checked the HORN module it self for damage - and of course the wiring.

[Erbby325]

Now neither of the front blinkers work. When i lock the csr the lights flash but not when i use my hazards or turn signals and the horn is now conpletely dead will not sound at all and i did find a missing ground the one near the intake but not sure if thats connected to anything or if its just a body ground for jumping the car or somthing


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[Erbby325]

And just got back and my cars overheating


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[STL_G8GT]

And just got back and my cars overheating


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Are your fans coming on?

[Erbby325]

No fans


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[STL_G8GT]

No fans


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:-( lemme put some thought into this

[Erbby325]

Ok and all the relays for those seem to be working


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[STL_G8GT]

Ok and all the relays for those seem to be working


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What do you mean by this?

[Erbby325]

Like for the horn and everything


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[Erbby325]

Click when i honk the horn but horn doesnt work at all anymore, turn signals in front dont work but when i lock or unlock the lights still flash my washer fluid motor doesnt work and my fans dont turn on


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[STL_G8GT]

Fans, front park lights, and horn all share ground # g104, which is the one that is connected to the underhood jump ground point. I would find that ground and verify its connection.

#1 in this picture
25032

[Erbby325]

Thats the one by the stock air box correct? Yes that was missing i ordered a new one but i didnt see a connection to it only a bolt that holds a bracket


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[STL_G8GT]

Thats the one by the stock air box correct? Yes that was missing i ordered a new one but i didnt see a connection to it only a bolt that holds a bracket


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You ordered a new "what" exactly?

[Erbby325]

Bracket and bolt


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[STL_G8GT]

But you don't physically see a ground wire with ring terminal on it in the area?
http://images.tapatalk-cdn.com/15/05/30/b05fc61caa54f6d453abc4b99f7344aa.jpg

[Erbby325]

The entire bracket and bolt are gone theres just a hole there in the morning ill look for that ground in the area its possible i pinched it down somewhere when i reinstalled my cai


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[STL_G8GT]

The entire bracket and bolt are gone theres just a hole there in the morning ill look for that ground in the area its possible i pinched it down somewhere when i reinstalled my cai


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Maybe the bracket and the whole thing are stuck down somewhere, that ground comes from just above the driver headlight, running along near the hood release cable.

I'm going to bet that the lack of ground is your problem. [emoji1]

[WhatNext]

Bracket or no bracket, find the ground wire and connect it to one of those shiny bolts to complete the ground. Then start the car and you'll know if it is the source of the problems.

Like stl-g8gt said, it's likely the cause.

[Erbby325]

Its fixed! thanks guys it was under my air intake inlet must of accidentally pushedbit down there when i reinstalled it now everything works great


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[SVg8gt]

This totally helped me fix my weird issue with lights and remote start. Thank you SO much.