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Ask Dave Nova Your Own Question
Dave Nova
Dave Nova, Chevrolet Technician
Category: Chevy
Satisfied Customers: 19451
Experience:  ASE Master Certification. GM World Class Certification
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Chevrolet Avalanche 1500 Z71: Have a chev avalanche that the

Customer Question

Have a chev avalanche that the marker lights have quit working on. There is no power to the fuses in the fuse panel under the hood or the one in the cab on the drivers side. If there is power put to the fuse then the lights will come on.
Submitted: 10 months ago.
Category: Chevy
Expert:  Juan Crespo replied 10 months ago.
Hi there.The relay is energized by the BCM (body control module) upon receiving a request signal from the multi-function switch. A scan tool will be needed to communicate with the BCM to see what's going on. Do you have access to such as scan tool?
Customer: replied 10 months ago.
no I don't have access to a scan tool. is there a way to check the multi function switch with out a scan tool
Customer: replied 10 months ago.
is it possible that the multi-function switch is not sending a signal to the BCM
Expert:  Juan Crespo replied 10 months ago.
It is possible that the multi-function switch is not sending a signal to the BCM - problem is we can't know for sure unless we use a scan tool.It looks like I won't be able to help you, so I'll opt out and let others try. Please do not reply until another expert responds or the site will cycle the request back to me.Best Regards.
Expert:  Dave Nova replied 10 months ago.
Hello, new expert here. My name is ***** ***** I will try to help you with your lighting problem. Turn the light switch ON and test for power at the INT PARK fuse on the left side of the dash. Let me know what you find there.
Customer: replied 9 months ago.
There is no INT fuse in the fuse panel on the left side of the dash
Customer: replied 9 months ago.
The only fuses for park that are there have no power
Expert:  Dave Nova replied 9 months ago.
Fuse #24. It is a 10 amp fuse.
Customer: replied 9 months ago.
There is no power at that fuse in the fuse panel
Expert:  Dave Nova replied 9 months ago.
This is with the headlight switch turned ON, correct?
Customer: replied 9 months ago.
Yes that is correct
Expert:  Dave Nova replied 9 months ago.
What about at 30 amp Park Lamp fuse in the underhood fuse panel?
Customer: replied 9 months ago.
There is no park lamp fuse as such under the hood in the fuse panel there is a relay for park LP and there is no power to the relay
Expert:  Dave Nova replied 9 months ago.
Fuse #12 in underhood panel. See attached picture.
Customer: replied 9 months ago.
Not the same style fuse box under hood as your picture
Expert:  Dave Nova replied 9 months ago.
What year is your Avalanche?
Customer: replied 9 months ago.
It's a 2006
Expert:  Dave Nova replied 9 months ago.
Initial information showed 2002. Let me look up schematics for a 2006 model.
Expert:  Dave Nova replied 9 months ago.
At the headlight switch connector, jumper the Black/White and Gray/Black wires. If the headlights come on, you have a bad headlight switch. If not, then your problem will likely be in the BCM (body control module). The BCM is the component that supplies a ground to turn on the park lamp relay.
Customer: replied 9 months ago.
Ok thanks it looks like it is in the bcm control module
Expert:  Dave Nova replied 9 months ago.
BCM is located under drivers side of the dash. Remove panel below the steering column to access.