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2006 Cadillac cts brake lights don't work I checked the

Customer Question
2006 Cadillac cts brake...

2006 Cadillac cts brake lights don't work I checked the fuses, relays and bulbs

Mechanic's Assistant: Have you checked the brake fluid? How's the level and when was it last changed?

?

Mechanic's Assistant: What confuses you?

What does that have to do with the brake lights

Mechanic's Assistant: Are you fixing your CTS yourself? What have you tried so far?

Yes checked bulbs relay and fuses

Submitted: 11 months ago.Category: Cadillac
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Answered in 8 minutes by:
7/31/2017
Cadillac Mechanic: Dan, Technician replied 11 months ago
Dan
Dan, Technician
Category: Cadillac
Satisfied Customers: 25,969
Experience: Independent Shop Experience, 2 Year Automotive Diploma, & Access to Information Database
Verified

Hello, my name is ***** ***** I'm here to help get your problem solved.

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Customer reply replied 11 months ago
2006 Cadillac cts brake lights don't work I checked the fuses, relays and bulbs
Customer reply replied 11 months ago
are you there
Cadillac Mechanic: Dan, Technician replied 11 months ago

Replace the BAS relay in rear left fusebox. If that doesn't help check to see if relay gets ground when pressing brake pedal, if not verify wire that goes from EBCM to relay is good, if so replace the brake pedal position sensor. Here is a wiring diagram of system to help with testing, let me know if you have questions. Thanks.

-

https://www.dropbox.com/s/2noz19x8brp3nlu/bl.pdf?dl=0

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Customer reply replied 11 months ago
my name is ***** ***** I replaced the BAS relay with another sensor then what should I do
Cadillac Mechanic: Dan, Technician replied 11 months ago

If you replaced bas relay then next step is checking wire between ebcm and relay, if good replace the brake position switch.

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Customer reply replied 11 months ago
how do I do that
Cadillac Mechanic: Dan, Technician replied 11 months ago

Also check to see if bas relay is getting ground when brakes are applied, if not check wiring between relay and ebcm. If good replace brake pedal sensor. You need to unplug the EBCM put one lead of meter on orange wire of pin C3 at EBCM, other lead at relay, and this will tell you resistance between the two points.

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Customer reply replied 11 months ago
ok thx
Cadillac Mechanic: Dan, Technician replied 11 months ago

No problem, let me know how it goes or if you run into questions. You can reply to this answer at any time without additional fees. Thanks.

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Customer reply replied 11 months ago
thank you
Cadillac Mechanic: Dan, Technician replied 11 months ago

Let me know if you need anything, thanks.

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Cadillac Mechanic: Dan, Technician replied 11 months ago

Ever get it figured out? Thanks

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