Join Date: Mar 2005
Location: Under an invisibility cloak, somewhere in the Northeast
I have been having a problem with my instument cluster lights. I cannot turn them on with the light switch. The only way they come on is with the auto headlights. Never seen this happen before. Even when I turn the headlights on manualy, they do not come on.
This is a common design function of some recent GM new models. Dash lights do not work in parade mode (manual lights on-day time). If you want dash lights in the rain and the auto lights do not turn on, just cover the light sensor with something. That is how we check function in shop.
Here is the actual answer from Pontiac from the new model prep guide:
Automatic Headlamp Control
The Solstice is equipped with an Automatic Lamp Control system which automatically turns the headlamps and other exterior lamps on at dusk or when necessary. The exterior lamps can also be operated manually. The I/P backlight is not integrated in the headlamp switch. The automatic lamp control system must determine if it's dark enough to turn I/P backlights on.
The Automatic Lamp Control system's light sensor is located on the top of the instrument panel. It is important to avoid placing any objects on or near the sensor, or covering up the sensor.
Important: In rainy weather, etc., the customer may comment that they manually turned on the headlamps; however, the I/P lights did not come one. It is important to note that the I/P backlight will only turn on when indicated by the Automatic Lamp Control's light sensor. This condition is not related to the headlamp switch function, BCM or I/P function. This is considered a normal condition and no parts should be replaced.
There is an available "software" update to change the operation if desired.
Originally Posted by GM Service Bulletin (slightly edited by Small Dealer)
Subject: Instrument Panel Cluster (IPC) Backlighting Inoperative During Daylight Hours (Reprogram BCM)
Models: 2004-2006 Chevrolet Malibu, Malibu Maxx
2005-2006 Chevrolet Cobalt
2006 Chevrolet HHR
2005-2006 Pontiac G6, Pursuit (Canada Only)
2006 Pontiac Solstice
Some customers may comment that the backlighting on the IPC does not illuminate in the daylight hours. They may further state that the backlighting does function at night, but not in the day time.
On these vehicles, backlighting for the IPC is not enabled unless the vehicle's lighting photocell determines that there is a nighttime ambient condition. Backlighting is not controlled through the use of the park lamp or headlamp switch. The conditions under which the photocell activates the backlighting may not satisfy each particular customer’s personal expectations, or the customer may simply prefer to have the backlighting always illuminated on the IPC.
For customers who wish to have the IPC backlighting always illuminated, a new service calibration is now available that will activate the backlighting to full intensity during daytime hours. Reprogram the BCM using SPS.
GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.
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