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NO BRAKE LIGHTS....Help a brother out!

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Old 04-10-2013, 01:51 PM
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Ok, I just did the cruise control & tap brakes still kills cruise. Is this the same switch?
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Old 04-10-2013, 01:57 PM
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Originally Posted by Stone17
Check the brake switch.

Check out the link below. Anti-Lock Brake PDF for the CTS.
https://docs.google.com/file/d/0B_xx...it?usp=sharing
Ok, it's 210 pages. Can we narrow it down to a section? BPP Sensor??
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Old 04-10-2013, 02:03 PM
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Originally Posted by LAYGO
Ok, it's 210 pages. Can we narrow it down to a section? BPP Sensor??
Check page 7 and 8.
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Old 04-10-2013, 02:25 PM
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Originally Posted by Stone17
Check page 7 and 8.
Right, Brake Pedal Position Sensor (BPP Sensor).

If it's responsible for killing the cruise, that worked. Now, it might not be working entirely correctly, just enough to kill cruise, but it at least did that.

I will see if there's some diagnostic in the pdf about the BPPS.
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Old 04-10-2013, 11:11 PM
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I went through this problem a little while ago.

My switch ended up being fine, it was the Neon light bars and specifically the BALLAST for them that ended up shorting out.

Problem: No brake lights, running lights worked fine.

Solution: Replaced corresponding fuse (BAS fuse in box behind drivers seat).

I unplugged the 3rd brake light from the harness to make sure that really was the problem. Fuse didn't blow anymore.

I replaced the neon tubes/ballast with a $25 autozone ricer LED kit after taking apart the whole third brake light.

Good times.

-meaty
Attached Thumbnails NO BRAKE LIGHTS....Help a brother out!-2012-11-23_01-27-39_881.jpg   NO BRAKE LIGHTS....Help a brother out!-2012-11-22_00-33-31_553.jpg  
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Old 04-10-2013, 11:14 PM
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I will check the BAS. Is it something that can be purchased at AutoZone?
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Old 04-10-2013, 11:19 PM
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Originally Posted by LAYGO
I will check the BAS. Is it something that can be purchased at AutoZone?
It's just your typical 10-15 amp mini fuse, don't remember which it is.

Take the cover off, you'll find it.

-meaty
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Old 04-10-2013, 11:27 PM
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Originally Posted by meatycts-v
it's just your typical 10-15 amp mini fuse, don't remember which it is.

Take the cover off, you'll find it.

-meaty
ohhhh
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Old 04-11-2013, 06:47 AM
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Originally Posted by meatyCTS-V
My switch ended up being fine, it was the Neon light bars and specifically the BALLAST for them that ended up shorting out.

Problem: No brake lights, running lights worked fine.

Solution: Replaced corresponding fuse (BAS fuse in box behind drivers seat).

Here the schematic of the BAS relay.
Attached Thumbnails NO BRAKE LIGHTS....Help a brother out!-bas-relay.jpg  
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Old 04-11-2013, 12:58 PM
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BAS Relay was fine, BAS Fuse was blown. Replaced fuse, lights work.

BAS = stupid name for brake lamps/lights fuse
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Old 04-11-2013, 09:56 PM
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Originally Posted by LAYGO
BAS Relay was fine, BAS Fuse was blown. Replaced fuse, lights work.

BAS = stupid name for brake lamps/lights fuse

Keep an eye on it, mine blew out again shortly after, due to the Ballast box getting moist and shorting out.

-meaty
Attached Thumbnails NO BRAKE LIGHTS....Help a brother out!-rustyballast.jpg  
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Old 09-24-2013, 06:38 PM
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I'm in a similar situation, except only the passenger side brake light is out..??
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Old 09-24-2013, 07:14 PM
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Apparently it was just a short ground. Hardly did anything except hook it back up and it worked.
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Old 09-24-2013, 11:51 PM
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Lucky you, that it wasn't a big pain in the *** like us lol
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Old 01-09-2015, 07:27 AM
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Does anyone have the part # for the BPP (Brake Pedal Position)?
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Old 01-09-2015, 12:35 PM
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Originally Posted by Stone17
Does anyone have the part # for the BPP (Brake Pedal Position)?
I got the part for $15.

ACD# 89047699
GM# 89047699
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Old 05-18-2018, 04:45 PM
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im having this same issue with my 05 cts. ive changed the break pedal sensor, BAS fuse, BAS relay, both lamps. still no break lights. could it be the body control module?
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Old 04-30-2020, 10:34 PM
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Originally Posted by crete68s
I'm in a similar situation, except only the passenger side brake light is out..??
how did you find the short? My passenger brake light doesn’t work. Did you change the fuse and relay?
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