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Ask GM Tech (Cam) Your Own Question

GM Tech (Cam)
GM Tech (Cam), Chevy Technician
Category: Chevy
Satisfied Customers: 27664
Experience:  GM Grand Master Technician 2007. 11 years experience.
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Chevrolet 2500hd: 2002 chevy 2500hd... i replaced heater core

Resolved Question:

2002 chevy 2500hd... i replaced heater core and put all back together and i have no brake lights or cruise control..cant figure out what i missed
Submitted: 2 years ago.
Category: Chevy
Expert:  GM Tech (Cam) replied 2 years ago.

GM Tech (Cam) :

Hello, I'm Cam. At anytime during our discussion you need more information or clarification, please reply.

GM Tech (Cam) :

Did you get the brake switch plugged back in on the switch and the junction block at the drivers left foot?

Expert:  GM Tech (Cam) replied 2 years ago.
Our chat has ended, but you can still continue to ask me questions here until you are satisfied with your answer. Come back to this page to view our conversation and any other new information.

What happens now?

If you haven’t already done so, please rate your answer above. Or, you can reply to me using the box below.
Customer: replied 2 years ago.
i know the brake switch is plugged in but im not sure what ur talking about junction block
Expert:  GM Tech (Cam) replied 2 years ago.
Ok, do you have a test light that we can test with?
Customer: replied 2 years ago.
yes
Expert:  GM Tech (Cam) replied 2 years ago.
Ok, does the orange wire at the brake switch get power?
Customer: replied 2 years ago.
no power on orange wire
Expert:  GM Tech (Cam) replied 2 years ago.
Tell me, does the stop lamp fuse get power?
Customer: replied 2 years ago.

yes it does


 

Expert:  GM Tech (Cam) replied 2 years ago.
Ok, can you check the wires that run from the back to the fuse block in the dash then?

And the junction block to the left drivers foot, did you miss a connection there?

Can you pull the main connectors off and check for bent pins and such? This orange wire needs to get power all the time and that is why it is not working as it controls the brakes and the cruise. Check this out and see what happens.
Customer: replied 2 years ago.
i found i 4 wire plug that is not connected.. i cannot find where it goes ..it branches out of a loom that continues up to roof liner and has a lt green/blk dk green/wht yellow/blk brown/wht wires
Expert:  GM Tech (Cam) replied 2 years ago.
Where exactly did you find the wire/connector at?

Pictures would be helpful if you can.
Customer: replied 2 years ago.
on drivers side top of dash branching off wire loom that continues up the window pilar
Expert:  GM Tech (Cam) replied 2 years ago.
That should not be related to the power on that orange wire.
Can you follow the wiring from the brake switch to the fuse block?
Customer: replied 2 years ago.
i have power to orange wire and still no brakes
Expert:  GM Tech (Cam) replied 2 years ago.
When you press the brakes, does the white wire beside the orange get power?
Customer: replied 2 years ago.

yes


 

Expert:  GM Tech (Cam) replied 2 years ago.
Does the top cab brake light work?.
Customer: replied 2 years ago.
no
Expert:  GM Tech (Cam) replied 2 years ago.
With your test light, does the VEH STOP fuse in the underhood fuse block get power with your foot on the brake?

Customer: replied 2 years ago.
no it does not ,no
Expert:  GM Tech (Cam) replied 2 years ago.
That connector you found I believe is the key. With the diagnosis so far, we have narrowed it down to that connector. See the picture below.
graphic


the connector number is XXXXX
Customer: replied 2 years ago.
does that have the same color wires as i told u cus i cannot find the connection
Expert:  GM Tech (Cam) replied 2 years ago.
Indeed it does. SO the end must be around there somewhere.

graphic
Customer: replied 2 years ago.
fyi we were talking about different plugs but i found all of them burried under defroster thank u very much
Expert:  GM Tech (Cam) replied 2 years ago.
YOu got it working then, that’s great.

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GM Tech (Cam), Chevy Technician
Category: Chevy
Satisfied Customers: 27664
Experience: GM Grand Master Technician 2007. 11 years experience.
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