Question about Chevrolet Caprice Classic

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The lights for my dimmer switch and the lights for my ac panel do not come on. What could be the reason for this?

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On some GM's this is telling you you have a tail light out. Check your tail lights and fuses for tail lights

Posted on Oct 07, 2010

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Posted on Jan 02, 2017

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2005 cavalier dash lights not working. all fuses are goood. replaced cluster, dimmer switch, multifunction switch


Back lighting or warning lights ? check engine , ABS , air bags , seat belt , oil light etc... ?
Interior Lamps Dimming
The second group includes lamps which may be dimmed. This group may use a combination of vacuum fluorescent (VF) illumination and incandescent lamps.
• Power window switches
• HVAC control head assembly
• Radio
• The instrument panel cluster (IPC)
When the ignition switch is turned to the ON position, the vacuum fluorescent (VF) display (radio) turns on at maximum brightness. When the park lamps are ON 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. When the headlamp switch is placed in the PARK position, the park lamp supply voltage circuit provides an input to the body control module (BCM). The BCM then supplies voltage to the instrument panel dimmer switch through the instrument panel dimming lamps control circuit. The setting of the instrument panel dimmer switch determines the amount of voltage that the instrument panel dimmer switch supplies to the BCM through the instrument panel dimming lamps low reference circuit. The BCM then sends a pulse width modulated (PWM) voltage to all the interior lamps. All the vacuum florescent (VF) and incandescent back lighting lamps are provided a specific voltage and are then grounded. When the headlight switch is turned to the PARK or HEADLAMP position, all incandescent back lighting turn on at the dimming level indicated by the IP dimmer switch. 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.

I would have it checked for DTC'S - diagnostic trouble codes stored in the BCM !
DTC B2624 Display Dimming Input Range/Performance
The body control module (BCM) supplies voltage to the instrument panel dimmer switch through the instrument panel dimmer switch signal circuit. The dimmer switch varies the voltage and returns the new voltage to the BCM through the dimmer switch signal return circuit. The BCM uses this voltage to determine the illumination level of the instrument panel lamps.

DTC B2625 Display Dimming Pulse Width Modulation (PWM) Output Circuit Range/Performance
The body control module (BCM) receives a variable voltage from the instrument panel (I/P) lamp dimmer switch. The BCM uses this signal in order to vary the illumination level of the I/P lamps. The I/P dimming lamps output from the BCM is a pulse width modulated voltage supply used to light the I/P lamps. If a malfunction occurs in the I/P dimming lamps output circuit, this DTC is set.

DTC B2662 Park Lamp Switch Circuit Malfunction
The park lamps are controlled by the turn/headlamp switch. Positive battery voltage is supplied to the switch through the EXT LP fuse. When the turn/headlamp switch is placed in the park or head position, battery voltage is supplied to the park lamps. The body control module (BCM) is also connected to the park lamp circuit to sense whether or not the park lamps turn ON when the low beam or high beam headlamps are turned ON. The BCM also uses the parklamp battery positive voltage to power the instrument panel (I/P) dimmer output circuit. If the BCM senses that the low beam or high beam headlamps are ON and the park lamp input is not active, DTC B2662 sets.
Do the park lamps work ?

Jun 11, 2017 | Cars & Trucks

1 Answer

2003 Pontiac Vibe no tail lights, brake lights and turn signals work just fine. The dimmer switch does not dim the dash lights but does work the dome just fineand the lights for the Heat/AC are off.


The tail lights work off the headlight switch, and there is a fuse for the tail lights. Make sure the fuse is good, first, a 15 amp (blue) fuse in the instrument panel fuse block. Then, you might have a bad headlight switch.
So you DO have dash lights, they just don't dim from the dimmer switch? In the wiring diagram, there is a green wire from a "tail light relay" (in the "Junction Block-Right Instrument Panel") that carries power to all the exterior lamps, as well as having a splice to the Instrument Panel Cluster (illum. bulbs), and to the lamp dimmer, and to the radio bulb.
To do any further testing, you would need a voltmeter or a test light, so you could chase down this power loss. Good luck.

Oct 17, 2016 | 2003 Pontiac Vibe

1 Answer

Cars 2003 blazer dash light comes off as


Do you have the dash light dimmer switch turned off by chance?

Mar 20, 2014 | 2003 Chevrolet Blazer

1 Answer

Instrument Panel Lights


Daytime headlight issue ? No , no sensor behind the front bumper . No Daytime time head lamp issue , doesn't turn on the instrument panel light's . This is more then likely a remote dimmer module problem .
Interior Lights Dimming Circuit Description (Pontiac)
When the park lights are on, battery positive voltage (B+) is applied via CKT 32 (YEL) to the remote dimmer module. The interior dimming switch in the lamp dimmer switch is a variable resistor which applies the dimming input via CKT 44 (DK GRN) to the remote dimmer module. The potentiometer in the lamp dimmer switch cannot provide enough current in order to operate the incandescent lights. The remote dimmer module amplifies the current, applying a variable voltage to the incandescent lights. As the amount of current increases, the lamps become brighter. As the amount of current decreases, the lamps become dimmer.
The radio, heater and A/C control assembly, instrument cluster, and passenger climate control each has a vacuum fluorescent (VF) display. When each module receives an input that the ignition switch is turned to the RUN position, each module activates the VF display at the full intensity. When the park lights are on, the radio receives the dimming level from an input on CKT 8 (GRY). The radio then relays this information to any other modules with VF displays. All modules with VF displays then adjust the dimming level of their VF display in order to match the level of the incandescent lamps.

May 16, 2017 | 1998 Pontiac Bonneville

1 Answer

95 Toyota Celica ST Dimmer Switch


The instrument dimmer function is most likely in the light switch. Pull the switch to turn the parking lights on. Then rotate the knob to bring the instrument lights on, continue rotation of the knob to bring the dome light on. Be sure to turn dome light off so as not to kill your battery. the dome light will not turn itself off.

May 08, 2017 | Cars & Trucks

1 Answer

My 99 s/10 guage lights and ac panel lights wont come on. All other lights do.


Could be the instrument light fuse, the headlight switch, or the dash dimmer control.

Dec 18, 2012 | Cars & Trucks

1 Answer

My instrument panel lights went out and I need the bulbs. How many bulbs do i need? Also the lights where the knobs for the heating/ac are out also is that the same as the instrument panel? I have a 1998...


are you sure that your fuses are all good?because it's highly impossible for all off your dash lights and your heater/a/c light burn out at the same time.and yes it is controlled all together.make sure that your dimmer switch is not turned all the way down cause this will cause them to not work.i believe that the dashboard alone has either 3 or 4 bulbs so im pretty sure it has to be a fuse or your dimmer switch.please try these options first ok. hope this info helps.take care and good luck, manny

Apr 02, 2010 | 1998 Toyota Camry

4 Answers

My a/c heater switch just went out on me. The blower works when I turn the fan on but I have no light on the control and I can't control the temperature. I purchased a new switch and the samething is...


hello sounds like u actually have two problems the switch that controls the lights is in the headlight/dimmer switch the problem with the temp control would be in the air door actuator motor replace motor and headlight switch will fix the problem ill be here if u need more info thank u and have a good day. josh

Feb 10, 2010 | 1999 Honda Accord

2 Answers

Panel lights


The instrument panel lights staying on usually means the dimmer switch is bad (round knob next to steering column movement switch) You can usually turn the knob to a lower position and this will solve the battery issue.
JPTCAT

Sep 25, 2008 | 1995 Jaguar XJ6

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