Question about 1998 Cadillac DeVille

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Dash display dash "blacks out" when left turn signal engaged. No problems when right engaged or bright/dim headlamp switching. When display comes back it says "Theft System Problem" "car may not restart" "service air bags" (other warnings also) Started noticing drop in displayed voltage prior to isolating left turn signal coincidence Anybody ever experience this type of situation?

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  • chryguy89
    chryguy89 Jan 07, 2013

    did you find out what was causing the black out from the left signal

  • Josey Apr 22, 2013

    I need help as well. My car started blacking out 2 months ago and the voltage started dropping. I thought it was a battery problem or wiring but nothing seems to work. Any other suggestions?

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

  • 3 Answers

SOURCE: Theft car system

dear Hun~ It all has to do with the Vats system in your car. You can bypass it or get a new key or you might need a new ignition cylinder.

Posted on Oct 12, 2008

  • 1 Answer

SOURCE: Service Stability System

I had the same problem...but I found out that the dealer had rotated incorrectly the tires.
Front and back are different sizes and if a rotation is performent front to rear, you may get a stability light warning.

I corrected my tires and the warning went a way.

Posted on Nov 18, 2008

SOURCE: the check air bag light stays on , and a service air bag alert at info center

Sounds like the sensor is tripped due to low pressure in the compressor you have to get the unit charged and the light will go off. Or take it to a auto parts store and have them put their diagnostic code reader on their and have them clear the codes this may fix it as well

Posted on Jan 23, 2009

  • 21 Answers

SOURCE: THEFT SYSTEM PROBLEM

u need the owners manual. it tells how to change the theft deterrent system.

Posted on Oct 07, 2009

czaa
  • 4514 Answers

SOURCE: I was driving on the

cud of did some damage to to wiring underneath--inspect well and get a haynes manual for guidance--those caddys r delicate n very complex--try to get a mobile scan for bad codes

Posted on Aug 17, 2010

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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

2 Answers

Dashboard lights will go out randomly. It has done it for short periods before but it did it for 200 miles on hwy in dark.


The sensor is usually located on the top of your dashboard. You might see it if you look into your vehicle through your windshield at your dash.
I have seen( one time ) that a gps was bright enough that it caused the dash lights not to come on because the sensor thought it was light outside.
Or you could have gotten a bad sensor.

Oct 23, 2015 | 2010 Chevrolet Equinox

1 Answer

How to turn bright lights off on 2003 cts


Could be a bad dimmer switch or a stuck high beam relay or the ( DIM ) dash integrated module .
Headlamp Low or High Beams Always On

2

  1. Turn the headlamp switch to the OFF position.
  2. Verify that the transmission shift lever is in the PARK position for vehicles equipped with automatic transmissions or the parking brake is applied for vehicles with manual transmissions.
  3. Expose the sunload sensor to a bright light.
  4. Turn the windshield wipers to the OFF position.
  5. Turn ON the ignition, with the engine OFF.
Are the head lamps ON? YES or NO

3

  1. Turn OFF the ignition.
  2. Install a scan tool.
  3. Turn ON the ignition, with the engine OFF.
  4. Turn the headlamp switch to the OFF position.
  5. With a scan tool, observe the Head Lamp Switch parameter in the Dash Integration Module (DIM) Inputs data list.
Does the scan tool indicate that the Head Lamp Switch parameter is OFF?
I would think you probably don't have a GM Tech 2 factory scan tool , this is a very involved diagnostic flow chart an you can't diagnose it very easily without the factory scan tool . You could replace parts an get lucky . I would start with the high beam relay in the under hood fuse / relay center . Do you know what a relay is , not to talk down to you because I don't what you know . The relay is energized by the DIM - dash integrated module . You may want to take this to a ASE certified repair shop or the dealer !
I would



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Jul 31, 2015 | 2003 Cadillac CTS

1 Answer

Why wont the headights or running lights work on my 2002 Buick LaSabre?


There are several reasons why your headlamps an running lights don't work , the headlamp switch is a good one ,plus relays an the DIM - dash integrated module an associated wiring ! Here is how the headlamps work , right out of Buick factory service info !
The dash integration module (DIM) provides battery positive voltage to the signal circuits of the headlamp switch. The signal circuits include the headlamp switch headlamps on signal, the flash to pass switch signal and the high beam input. With the headlamp switch in the ON position, a ground path is available for the headlamp switch headlamps on signal circuit of the DIM through the headlamp switch. The DIM provides ground to either the headlamps high beam relay control circuit or the headlamps low beam relay control circuit of the low beam circuit. The position of the headlamp dimmer switch determines which relay control circuit has ground. The DIM supplies battery positive voltage to the relay control circuits, if the headlamps are necessary. The fuse block - underhood supplies battery positive voltage to both relay switch circuits. When the low beam relay control circuit is energized, current flow is to both low beam fuses and to the low beam headlamps. The headlamps have ground at G103 and at G401. When the headlamp high beam relay control circuit is energized, current flow is to both high beam fuses and to the high beam headlamps. The high beam circuit is divided into a left and right side circuit. The current flow of the left high beam is from the fuse to the left high beam lamp. From the lamp, the current flows to the normally-closed contact of the DRL relay to G103. The current flow of the right high beam is from the fuse to the right high beam lamp. From the lamp, the current flow is to ground at G401. When the headlamp dimmer switch lever is pulled toward the driver, the flash-to-pass switch closes. This grounds the DIM flash to pass switch signal circuit. In response to this input, the DIM energizes the HDLP HI BM relay. Both high beams remain on until the driver releases the switch handle. If the low beam headlamps were on during a flash to pass operation, the low beams remain on. The headlights may be switched to high beam with the opposite movement of the headlamp dimmer switch lever.
By running lights , do you mean park lamps or day time running lamps ?
Park, Tail, License and Marker Lamps
The park lamps, including the license lamps, are turned on when the headlamp switch is placed in the PARK or ON position or anytime the headlights are requested. The fuse block - rear supplies battery positive voltage to the switch contacts of the Park LP relay. When the headlamp switch is in PARK or in ON, the park lamp switch on signal circuit of the DIM has a ground path. The DIM provides battery positive voltage to the control circuit of the Park LP relay. When the park lamps and/or the tail lamps are ON, the DIM energizes the park lamp relay control circuit. This closes the switch contacts. Current flows from the Park LP relay to the LH PARK LP and the RH PARK LP fuses. From the fuse, the current flows to the park lamps. The left park lamps are grounded at G103, G401 and G402. The right park lamps and the right tail lamps are grounded at G103 and G401. The DIMR fuse supplies battery positive voltage to the license lamps and to the DIM instrument panel lamp fuse supply voltage - 1 circuit, for interior lamps dimming. The license lamps are grounded at G401.
The best advice I can give is that you take this to a ASE certified professional repair facility unless your a qualified automotive electric repair person !
Diagnostic Starting Point - Lighting Systems
Begin the system diagnosis with the Diagnostic System Check - Lighting Systems . The Diagnostic System Check will provide the following information:
?€¢
The identification of the control modules which command the system


?€¢
The ability of the control modules to communicate through the serial data circuit


?€¢
The identification of any stored diagnostic trouble codes (DTCs) and their status

The use of the Diagnostic System Check will identify the correct procedure for diagnosing the system and where the procedure is located.

The

Mar 15, 2015 | 2002 Buick LeSabre

1 Answer

I came to this project in the middle so I am not sure this a pre existing problem. What I have is a left turn signal very dim while the right is normal, gas gauge shows over a quarter full yet the low...


Check the front and rear turn signals on the left. If both are just as bright as the right turn signals, then the dim bulb is isolated just to the dash. Possibly someone replaced the bulb at one time with the wrong rated bulb. A steady dim bulb doesn't sound like a loose ground. It would probably be going in and out or flickering, and just that one side would not have a separate ground. High resistance in a wire (like broken strands)or a connection could cut the current and cause a dim bulb. If the whole left side is dim, both the dash and the signaling bulbs, start looking for high resistance in that side of the circuit. To thoroughly check it out, probably need a volt meter

Oct 17, 2013 | 1983 Cadillac DeVille

1 Answer

I have a 2004 Saturn Ion 2. I have several random problems with the car. First the Coolant light always come on when I first start the car, there is coolant in with no leaks. The Coolant warning does not...


Could have connection issues at the BCM - body control module , lose ground . The BCM controls all the thing's your have problems with .
Turn Signal Lamps
When the turn signal switch is place in either the right or left turn position, the turn/hazard request circuit is pulled low, through a resistor. The body control module (BCM) uses the resistors to determine if the left or right turn signals have been requested. The BCM then supplies an ON-OFF voltage to the turn signal lamps and turn signal indicator on the selected side of the vehicle. The turn signals receive a ground at G101, G401, or G403.

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.

Engine Coolant Indicator(s)
LOW COOLANT LEVEL
The IPC illuminates the low coolant warning indicator when any of the following occur:
• The BCM detects a low coolant level condition for at least 30 seconds. The IPC receives a class 2 message from the BCM requesting illumination.
• The IPC performs the displays test at the start of each ignition cycle. The indicator illuminates for approximately 3 seconds .

The thing to do first would be to hook up a factory or professional type scan tool an check for Instrument cluster or BCM DTC'S - diagnostic trouble codes . Then checking connection 's at the BCM , testing power an grounds .


ECM Inputs and Outputs Diagnosis

Open Circuit Detection Wiring Diagram 1

Mar 28, 2017 | 2003 Saturn ION

1 Answer

1997 Mercury villager left headlight doesn't work.


go here. we can help you. Also, did you check the headlamp relay in the box under the hood? One relay is in box in front of battery, other is in narrow box along passenger side fender under the hood. swap left & rt headlamp relays to see if it changes.

http://groups.yahoo.com/group/villagerquest/

Jul 13, 2009 | 1995 Mercury Villager

1 Answer

Only brights work, dimly lit headlamps, no fog lamps


Recheck the bulb number. This happens when the wrong bulb number is installed. Otherwise it could be a bad headlight ground.

May 17, 2009 | 2000 Pontiac Grand Prix

1 Answer

Driver's headlight is dim; wipers only work if headlight is off


Sounds like the jolt from the barrier has caused a bad ground to occur. Look for a bad ground wire around the left headlamp in or around the headlight bucket.
Tighten or replace the bad ground wire. A poor contact will cause the headlight to light dimly.

Mar 03, 2009 | 2008 Ford Focus SE Sedan

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