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Check in the under hood fuse block or power distribution center for fuse #72 and #75 these are 60 amp fuses. If the problem isn't there you have Two separate problems, check at the switches for battery voltage and ground. The most common problem is switches.
Do you know how to test automotive electrical circuits ? Looking at a wiring diagram for the HVAC - blower motor circuit so you know what's involved in making the blower motor work , then using a DVOM - digital volt ohmmeter to test the circuit to find the problem is how a professional technician would do . https://www.youtube.com/watch?v=SO-eKuhCOqc&t=125s
Free wiring diagrams here http://www.bbbind.com/free-tsb/ Enter the vehicle info. Year , make model an engine . Under system click on HVAC ,then under subsystem HVAC controls will pop in. Click the search button then the blue link's one at a time . Looking at the first one i see the blower motor circuit . The HVAC relay in the BCM could be bad . That would be a good place to test the control an Battery voltage supply for the relay . The BCM is located behind the right front of the center console , plastic cover pulls off . Videos on youtube for testing relay https://www.youtube.com/watch?v=Gg20X-FwGzg&t=36s
Having the vehicle checked for DTC'S -diagnostic trouble code's , In all the module's on the vehicle ! Not just OBD2 engine code's . BCM - body control module ,radio , HVAC - heating an A/C control panel . All these thing's can have DTC'S . If no DTC are found the next step ,viewing wiring diagrams to see if these share a gound or B+ voltage supply ! Do you know what a body or chassis ground point is ? The brake pedal position sensor is an input to the BCM . The brake light's are turned on by a high side driver ( transistor ) inside the BCM . As are the turn signal's . The radio an the HVAC controls - heating an A/C are tied together . But do not share any circuit's with the BCM or the turn signals or the brake light's . The turn signals , brake light's an the BCM share a common grounding point G403 . Can't really see why using the brakes an turn signal's would cause the radio an A/C to turn off . Wouldn't be fuse's , nor the battery , more thing's wouldn't be working . Your best bet mite be to take it to a qualified repair shop an pay an hour dignostic time . Or bring it to me . If i can't find the problem in an hour i won't charge you . Do you know anything about automotive electrical systems ? Looking at wiring diagrams , using a DVOM - digital volt ohm meter to test the electrical circuit's . Free wiring diagrams here http://www.bbbind.com/free_tsb.html Enter vehicle info. year make , model an engine size . Under system click on lighting ,then under subsystem click on stop lamps . Click the search button ,then the blue link's one at a time . Electric Testing Techniques You Need to Know ECM Inputs and Outputs Diagnosis
Testing an not guessing is how to find electrical problems .
I would take a look see at the ground circuits for the none working lights . The incandescent back lighting lamps are then grounded at G200, G301 and G302. You would need factory service info for the location of the grounds .Like this from buick
G200
Right side of the I/P, secured on the underside of the cross car beam, behind the I/P compartment . The I/P compartment is the glove box ,don't know why they just don't say that . You could also check out the power and ground from the componet that's not working ! You can find factory like service info. from alldata http://www.alldata.com/ . Check out some videos on youtube
Interior Lamps Dimming
The second group includes lamps which may be dimmed. This group may use a combination of vacuum fluorescent (VF) illumination and of incandescent lamps.
• The door switches and the window switches
• The HVAC control head assembly
• The radio
• The instrument panel cluster (IPC)
• The steering wheel controls
• The heated seat switch
• The HUD switch
• The lift glass window release switch and traction control switch
When the ignition switch is turned to the ON position, the vacuum fluorescent (VF) displays (radio and HVAC control assembly), incandescent lamps, turn on at maximum brightness. When the park lamps are on and the ambient light sensor indicates low light conditions, all incandescent back lighting turn on at the dimming level indicated by the IP dimmer switch. At the same time all vacuum fluorescent (VF) displays dim to match the indicated dimming level. The BCM L fuse in the console fuse block, supplies battery positive voltage to the BCM. The I/P courtesy lamps supply voltage circuit of the BCM, supplies battery positive voltage to all the dimmable lamps. When the headlamp switch is placed in the PARK position, the BCM will then dim the interior lamps to the dimming level indicated by the IP dimmer switch. When the driver selects a dimming setting by moving, the IP dimming switch potentiometer, all incandescent back lighting lamps are provided with a specific voltage. The incandescent back lighting lamps are then grounded at G200, G301 and G302. When the IP dimmer switch is moved from MIN to MAX, all vacuum fluorescent (VF) displays, as well as all incandescent back lighting respond from Minimum intensity to maximum brightness in response to the IP dimmer switch.
The driver may select parade mode by manually turning on the park lamps during daylight conditions. The front park lamp circuit supplies voltage to the instrument panel cluster, radio and HVAC assembly for a park lamp on input, and the displays will become full bright.
Start by checking power an grounds at the control panel ,you'll have to take the plastic trim panel off to get the control panel out . You could have a bad HVAC panel ,
HVAC Control Module
The HVAC control module is a class 2 device that interfaces between the operator and the HVAC system to maintain air temperature and distribution settings. The battery positive voltage circuit provides power that the control module uses for keep alive memory (KAM). If the battery positive voltage circuit loses power, all HVAC DTCs and settings will be erased from KAM. The body control module (BCM), which is the vehicle mode master, provides a device on signal. The control module supports the following features:
No other lights on ,dome, courtesy etc...
Battery Rundown Protection/Inadvertent Power
In the event that any of the interior lamps supplied voltage by the inadvertent power relay and ground from the courtesy lamp relay were to remain on when the ignition is OFF after a period of 20 minutes, the BCM will deactivate the inadvertent power relay turning OFF all of the lamps on that circuit to prevent total battery discharge. Only when the ignition switch is cycled back to the RUN position will the BCM reset the internal timer and reactivate the inadvertent power relay. When the inadvertent power relay is not energized, the BCM utilizes the inadvertent power courtesy lamp supply voltage circuit to monitor for a courtesy lamp switch request signal. If a courtesy lamp switch is activated, the BCM will receive the signal to energize the inadvertent power relay by grounding the control circuit.
It maybe your radio !
It may
One of the modules may be doing it , interior light lit -glove box ! Hard to say on newer vehicles , after 1996 ! You vehicle has some of these modules if not all !
The class 2 serial data line on this vehicle is a star configuration. The following modules communicate on the class 2 serial data line:
?€¢
The body control module (BCM)
?€¢
The digital radio reciever
?€¢
The driver door module (DDM)
?€¢
The electronic brake control module (EBCM)
?€¢
The front passenger door module (FPDM)
?€¢
The HVAC control module
?€¢
The inflatable restraint sensing and diagnostic module (SDM)
?€¢
The instrument panel cluster (IPC)
?€¢
The memory seat module (MSM)
?€¢
The powertrain control module (PCM)
?€¢
The radio
?€¢
The radio amplifier
?€¢
The rear seat audio (RSA) controller
?€¢
The rear seat entertainment (RSE) assembly w/U42
?€¢
The rear wheel steering control module
?€¢
The remote playback device-CD player w/U1S
?€¢
The transfer case shift control module
?€¢
The transmission control module (TCM) w/Allison Transmission
?€¢
The theft deterrent control module
?€¢
The vehicle communication interface module (VCIM) w/UE1
Switch, fuse or maybe the wiring to the window has come loose or off, happens alot, kits are available at local auto parts stores...
I hope that helps...
.09 mA is normal memory power draw for clock, ecm, & bcm .. its when you have a draw over a half amp to full amp. the radio acting funny may be low voltage or a intermittent short/ draw from the radoi circuit. not really enough info to determine. check for a voltage drop twix the battery and fuse block, anything more than half a volt difference may be bad battery cables or connection. also check or have the alternator checked, if there is a bad diode, alt bleeding AC voltage, or over charging the battery which will kill even the best battery in a year.good luck, hope this helps
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