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ClayA, ASE Certified Technician
Category: Chevy
Satisfied Customers: 116
Experience:  Ten years experience, ASE Master and Advanced Level Specialist certifications. 2006 Winner National Ford/AAA Student Auto Skills
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Chevrolet Tahoe Z71: 2000 Chevy Tahoe Z-71 5.7L I have no brake

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2000 Chevy Tahoe Z-71 5.7L I have no brake lights turn signal lights and no hazards. I have checked the 20 Amp fuse located on the side of the dash, it is OK. I have replaced flasher under dash. The problem started after I left the hazard lights going one night, and cam back about an hour later, and found none of the above would work. Also the cruse control has not worked for about a year. Can you help?
I will start with having you do some basic diagnostic test.

Do you have a voltage meter?

We know the fuse is good but we need to know if it has the proper voltage to it.

What is the voltage to the 20A Stop/HAZ fuse?
Customer: replied 3 years ago.

the voltage is 12.53 volts

I am going to post the wiring diagram and then will post the diagnostics for the diagram.

Here are the connector pinouts for the combination switch in the column.



Locate the connector for the combination switch under the steering column. I need you to test for voltage at several pins and post back the results. I will number the test. Please list you response by the test numbers.

  1. What is the voltage on the orange wire at pin E8?
  2. What is the voltage on the pink wire at pin A2?
  3. With the hazard switch on what is the voltage on gray wire at pin E1?
  4. With the hazard switch off what is the voltage on light blue wire at pin A1?



Note: You can use a safety pin or a sewing needle to poke into the wire to test them.

Customer: replied 3 years ago.

I received your response. It may take me some time to get back with you on this as I will not always be available this week end. One thing I should also mention is that this 2000 Tahoe Z71 is an early model and is actually a 1999 body style, if this makes a difference. It is also has 4WD.

Okay, and yes I am aware of it being the early model due to the 5.7 engine.

Let me know what you find.
Customer: replied 3 years ago.


1. 12.4 V

2. 0 Volts (12.4 Volts with ignition on).

3. 0 Volts

4. 0 Volts (light blue wire at pin A3 not A1)


With voltage going in but no voltage out I would think that you have a bad turn signal/hazard switch. This is also referred to sometimes as the multifunction switch.
Customer: replied 3 years ago.

Do you think this will also fix the cruise control problem?

It is very possible it could fix the cruise problem. However, I would recommend replacing this switch before diagnosing the cruise problem.
Customer: replied 3 years ago.

OK. I will replace this switch and see if that takes care of all the problems. I have the part on order now, do you have any instructions or suggestions on the replacement process. I should have all the tool necessary, including the steering wheel puller.

Maybe this video can help with replacement. I think this should be the same or similar to yours.
Customer: replied 3 years ago.

I ordered the multifunction switch from 1A Auto and it should arrive in the next two days. In the video I did not see if the wire that goes to the brake pedal switch has to be removed and replaced. Does the multifunction switch have a wire that has to be hooked up to the brake switch? If so, it looks like that might be difficult to get to.

No, all of the wires go to one connector that is attached to the Turn/Hazard Switch. The wire branch off through the harness after the main Turn/Hazard Switch connector. So no hard to get to problems there.
Customer: replied 3 years ago.

I'm having trouble getting the air bag assy off of the steering wheel. I have dis-connected the battery and removed the air bag fuse. I'm using a screwdriver in the two access holes coming in from the back side to try and make the release. I have tried pushing straight in, but there seems to be no give to the spring release. I have worked on this for an hour and I can not get the cover to release. PLEASE HELP. I have looked at all the videos I can find.

Here is a link to another Experts answer that might be of assistance to you.

Let me know if you need further help.
Customer: replied 3 years ago.

Are there two pins that have to be released in each of the two recessed openings on the back side of the steering wheel? when I look at the recessed area I see one recessed level with a Torx head screw and then a second deeper recess with a flat piece of metal at the bottom. I don't see how I can release two pins on both sides when there is only one recess 180 degrees apart. When I push and pry on this flat piece of metal nothing happens. The illustrations in the reference attachment look nothing like what I'm seeing. I'm sure this is a factory steering wheel but could there be more than one this model year? I have been pushing straight down very hard on the metal at the bottom of the hole with a screwdriver and I can feel the top of the cover move with the force but nothing releases.

Can you post a picture of your steering wheel and the openings?
Customer: replied 3 years ago.


Okay, I edited your picture with a red arrow showing the spring clip that has to be pried to the side. Pry it over then gently pull that side of the airbag till it moves a little. Then repeat on the other side till you it comes out.

ClayA and other Chevy Specialists are ready to help you
Customer: replied 3 years ago.

Thanks for your help. That was the lighting problem and every thing went well, going back together. I thought that might fix the cruise control but it did not.

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