I just bought a 2003 H2 and it has a few minor issues which I can take care of, but one issue has me puzzled. My guages in the dash all work great, but there are no lights that work, so at night you can't see your guages. Does this mean I need to send my panel somewhere to have it fixed, or is there a fuse somewhere that might need replaced?

Thanks

 

The lights are soldered into the circuit board. It's worth sending it in to get them all replaced with new LEDs, as well as new stepper motors behind the gauges. Most places are for you a choice of lighting color as well. Only takes 15 minutes to pull the cluster. The vehicle is still drivable without the cluster installed.... If you must use it while you're waiting a couple days for your rebuilt cluster to arrive back. (There won't be any record of the miles you drove it)

 

https://www.hummerforums.com/forum/h...-repair-49116/

 

It's odd all gauge lights are affected, haven't had time to look at the wiring diagram yet,but it's possible the issue lies elsewhere...

 

Use a large flat object like a putty knife, and pop upwards on the driver door sill plate. It is snapped in position. Once you get it off, grab a hold of the one just in front of it around the parking brake and pull back and it will unsnap. That will reveal a ground point that is worth checking. And of course the ground between the back of the driver side cylinder head and the firewall. I would remove both grounds and clean them real well. You can also go around the underside, look at the brackets that support the body mounts. You'll find several ground locations with ring terminals. Make sure they're all clean and corrosion free. There's also one just above the driver side tow hook in the front bumper. The one behind the rear driver side tire, on the body support bracket is an important one. Things like the fuel pump are grounded there. The other important one, if you lean over the driver side fender well, you can reach down to the top edge of the oil pan, and just above it you'll find another ground with a couple ring terminals. If the battery cables themselves look original, they should be replaced....a lot of electrical issues end up getting traced to worn out battery cables that are corroded inside, as well as a weak battery. Good place to start troubleshooting electrical stuff.

 

From the diagram, associated pins on the 24-Way instrument cluster connector are:-

• A12 "ILLUM GROUND" - Black wire (1050) which connects to ground G203 "NEAR RIGHT KICK PANEL"
• A11 "ILLUMINATION" - Red (2353) "Dimming Control" wire which links to BCM connector C1 Pin A

so include G203 above with what RobertDez mentioned about grounds

 

Curious, what about the other lights on the dash? If you rotate the **** to dim or brighten them, do they respond correctly or are they all out? If they are all out it may just be that switch. (Or the ground for it)

 

RobertDez good point ✔️

 

Those dash light dimmer wheels... If they don't get used regularly, the rheostat inside tends to get corroded and lose contact. Sometimes they'll start working if you rotate them up and down 20 or 30 times, sort of cleaning up any corrosion. The whole switch is not expensive in the aftermarket. It's a pretty basic design, not something I'd be adamant about using genuine GM on.

Lol, on a side note..... Make sure the wheel isn't all the way down, keeping the dash lights off :-)

Been there, done that...lol

 

Very much agree, to add it's easy disturb whilst cleaning your dash.