Question about 2001 Dodge Dakota

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HEAD LIGHTS WONT COME ON . BUT LIGHT DIMLY LIKE LOW VOLTAGE OR FEEDBACK . I F BATTERY UNHOOKED THEN REHOOKED UP THEY WORK FOR AWILE ?

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  • rose02 Mar 13, 2009

    THE ONLY OTHER ITEMS NOT WORKING ARE THE DASH LIGHTES & THE DOME LIGHT . CHECKED ALL GROUNDS THEY ARE GOOD , WHEN YOU RECONNECT BATTEY AFTER ALL NIGHT EVERY THING WORKS BUT FLASHES FOR A FEW MINUTES THEN HEADLIGHTS GO DIM AGAIN AND NO DASH OR DOME LIGHTS . THIS HAPPEN IF THE CAR IS RUNNING OR NOT .

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Do all the other electrical items work? Is the car running when the problem occurs? Disconnecting and reconnecting the battery works for a time, so might be a loose ground somewhere. Since reconnecting the battery fixes the problem for a little while, check the ground connection on the cable that leads from the battery to the engine block. If it's loose, it may make good contact when the battery connection is manipulated, then loosens again. So trace the ground wire from the battery to the engine block and be sure the connection is tight. Also check the connection at the alternator as well as at the positve terminal of the battery.

Posted on Mar 13, 2009

  • tomsrancho Mar 14, 2009

    Call Car Talk Saturday morning. Get their number from NPR.org. The hosts are funny, but very smart. If they can't solve your problem, sell the car (during daylight hours!).

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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
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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
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1 Answer

Head lights dims out


old post day, Geo underdogs.
is engine running, seem yes, pretend yes...
high and low beams dim (means weak not low or high beams)
dim bulbs. all elements, left and right sides?
well first is battery voltage
use a $10 walfart DMM meter., (set to volts)
13.3. to 15vdc is the voltage running, on a hot engine rpm is 700+
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next time say DRL or canada, ok?

if all lamps are dim on the HL,
the the ground to them are bad.
there are 4 bulbs , 2 high 2 low, all for dim is bad ground there.
the Headlamp relay sends 12vdc to all 4bulbs, and most read 12v or more.
the lamps are grounded by the HL combo switch on THIS car
the ground must be good to this switch 0v, HL onl.
or the ground is bad. a white/black wire called G200
if 12vdc is weak (low) to HL then the relay or wire to it are bad.
if the ground is not 0v, (no more than 0.5vdc) then the ground is bad. if the ground is good, then the HL switch is bad and if bad gets hot and smell... (melting plastic in side)
there is the full answer, sans DRL> (a longer story that)

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2 Answers

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No Dim's


Skinny, I think your on the right track. Disconnect one of your low beam head lights, turn the headlights on and to low beam, you should have voltage on the "tan"wire at the headlight. If you do not, go to the dimmer switch under the steering column and check the same wire. If it still has no voltage, replace the dimmer switch.
Good luck and let me know.
Regards,

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