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05 Yukon instrument cluster lights out


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dca1983
New User

Jan 29, 2013, 2:15 PM

Post #1 of 9 (3312 views)
05 Yukon instrument cluster lights out Sign In

I have a 2005 GMC Yukon. The instrument cluster lights are out. The digital lighting (odometer/transmission) works. Cig. lighters, all other interior/exterior lights work, but light behind gauges and a/c buttons is out. The dimmer switch seems to be working properly as dome lights come on and the digital read off dims and brightens. All signs point to a fuse, but I can't find it. Consulted owner's manual to try to find the correct fuse. Pulled two fuses (including one labeled for instrument panel cluster/driver information center), both were good.


Hammer Time
Ultimate Carjunky / Moderator
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Jan 29, 2013, 3:04 PM

Post #2 of 9 (3294 views)
Re: 05 Yukon instrument cluster lights out Sign In

No, it doesn't point to a fuse. It points to a bad instrument cluster. You need a bidirectional scan tool that can test the lights via the BCM.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Discretesignals
Ultimate Carjunky / Moderator
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Jan 29, 2013, 3:11 PM

Post #3 of 9 (3291 views)
Re: 05 Yukon instrument cluster lights out Sign In

IP cluster illumination power comes from the body control module. You'll need to remove the instrument cluster to gain access to the connector. Check for power on connector A pin 11 red wire by back probing with a volt meter. Should have battery voltage with headlamps on. If power is good, do a voltage drop on connector A pin 12 black wire. Should be less than 0.5 V. Post your results.





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

(This post was edited by Discretesignals on Jan 29, 2013, 3:12 PM)


dca1983
New User

Jan 29, 2013, 3:27 PM

Post #4 of 9 (3277 views)
Re: 05 Yukon instrument cluster lights out Sign In

If the instrument cluster was bad, would that cause the light behind a/c buttons to go out??


(This post was edited by dca1983 on Jan 29, 2013, 3:27 PM)


Discretesignals
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Jan 29, 2013, 6:01 PM

Post #5 of 9 (3264 views)
Re: 05 Yukon instrument cluster lights out Sign In

 
Either way, your going to need a wiring schematic and a volt meter to trace where the power or ground is being lost. The body control module supplies power and controls the dimming functions of the lamps in both the cluster and the ac control panel.

Without those tools and knowing where and how to check those circuits, it is near impossible to give you any sort of educated guess.





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

(This post was edited by Discretesignals on Jan 29, 2013, 6:12 PM)


MarineGrunt
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Jan 29, 2013, 6:57 PM

Post #6 of 9 (3255 views)
Re: 05 Yukon instrument cluster lights out Sign In

Be sure to follow HT and DS's advice because they are pros and know the proper way to troubleshoot to find the correct problem but I had a similar problem with my 2003 Sierra and mine ended up being bulbs that were out. I had cluster lights, radio lights, and hvac lights out. I've heard that the cluster isn't serviceable but the bulbs can be replaced as can the bulbs on other components. You have to make sure you know what you're doing because it can be all too easy to fry something. The ac is a royal pain. I replaced all of my bulbs with leds, but if I were to do it over again, I would probably just buy a used unit. The digital are cheaper than the manual. But, just because I had a similar issue doesn't mean our issues are the same. Do the correct testing to find out. If you don't do the correct testing many times it ends up becoming more of a headache because you end up causing more issues and it ends up costing more in the long run.


dca1983
New User

Jan 30, 2013, 7:09 AM

Post #7 of 9 (3239 views)
Re: 05 Yukon instrument cluster lights out Sign In

Well, I found the bad fuse. It was one of the fuses for the body control module. When replaced twice, the new fuses popped right away so there's a short somewhere. Won't have time to tear into it until tomorrow.


Discretesignals
Ultimate Carjunky / Moderator
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Jan 30, 2013, 7:32 AM

Post #8 of 9 (3235 views)
Re: 05 Yukon instrument cluster lights out Sign In

Which fuse? Is there any aftermarket equipment installed or recent work done before you noticed the illumination problem?





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.


dca1983
New User

Jan 30, 2013, 7:43 AM

Post #9 of 9 (3227 views)
Re: 05 Yukon instrument cluster lights out Sign In

TBC 2B I believe, do not have the truck with me today, drove car to work.

No special work done to it.






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