Question about 2004 Chevrolet Cavalier

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Right side will not work light glow only

Switch lamp over to left side problem stayed on right side checked all fuses they were all ok also all connections service light on , bright light symbol on the dash panel all the time with the light turned on

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If you have a service vehicle soon light (not service engine soon) this usually indicates a problem with the foreward lamp system.Your problem seems confusing, but check your high beam lamp operation. These cars are NOTORIOUS for corroded harnesses to the headlights. The problem is usually buried behind the washer bottle or across the radiator area. If you are lucky, it may be a burned out high beam bulb. If the blue symbol for brights stays on and there is no click when pulling on high beam lever, you will need a new turn signal switch.

Posted on Jun 22, 2009


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2008 ford ranger headlight relay bad? Lamps do not light up, checked BULBS..OK no left highbeam Left and right lamp fuses ok and hi/lo 30a fuse ok

Did you check the fuse circuit for voltage, use a testlite or something.
I posted part of headlamp wiring. You understand your dimmer switch is involved in the circuits.

Oct 22, 2016 | 2008 Ford Ranger

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Right low beam headlight does not come on but my right turn signal will stay even tho i diddnt turn it on. If I cut on my high beams the rurn signal cuts off. Whats wrong? Helo

It could be the lamp control module !
Battery positive voltage (B+) is applied at all times to the lamp control module (LCM) through the underhood fuse block HDLP fuse.
When you place the headlamp switch in the HEAD position, the headlamps input to the LCM is grounded. The LCM then applies battery positive voltage (B+) through the underhood fuse block HDLOBML fuse and HDLOBMR fuse, which feed the left low beam headlamp and the right low beam headlamp respectively. When you activate the headlamp dimmer switch by pulling on the multifunction lever until the switch clicks, the high beam input circuit to the LCM in grounded . The LCM then removes battery positive voltage (B+) from the low beam headlamps and supplies battery positive voltage (B+) through the underhood fuse block HDHIBML fuse and HDHIBMR fuse, which feed the left high beam headlamp and the right high beam headlamp respectively.
Check this fuse in the left under hood fuse box first. HDLOBMR Fuse 18 10 Amp. RH Low Beam Headlamp . If the fuse is good check for B+ voltage with the low beams on . Use a test light or volt meter . If you look on top of fuse there are two metal tabs ,check there for B+ voltage , If no B+ voltage the LCM - lamp control module isn't supplying any .
Lamp Control Module (LCM)
Under the left side of the IP, to the right of the steering column
Turn Signal Flasher
Under the left side of the IP, to the right of the steering column
Lighting Systems Component Views in Lighting Systems
Lighting Systems Connector End Views in Lighting Systems
Turn Signal/Hazard Switch
In the left front of the passenger compartment, in the steering column

Apr 28, 2016 | 2000 Buick Park Avenue

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Either your bulb is out or there is a bad connection somewhere. Usually in the socket. Clean up the connections if needed.

Oct 22, 2015 | 2005 Jeep Liberty

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Brake lights 2001 Oldsmobile aurora

switch may have failed under dash at brake pedal arm or got unplugged but BIG FEET

Sep 10, 2015 | 2001 Oldsmobile Aurora

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Headlights are not working is it the fuse

both headlights?
many cars have 2 fuse one for left and one for right.
the operators guide shows fuses. fues 45 and 46 (HL left/right)
USA answer, if in Canada, with DRL light, do say so now....
(daylight running light option)
this car has headlight relay,
the HL switch ground the HL relay coil, the coil energizes and
12v power hits both head light fuses. and then lamps.
the lamps are grounded and glow.
the schematic is on
easy tests. with any voltmeter.

Feb 08, 2014 | 1993 Acura Legend

2 Answers

I have a 1994 geo metro. The headlights went out. I checked the fuses. They were ok. The ground wire in the under dash fuse box looked discolored. I made a ground and the left side head light came on...

On these cars the headlights get power from a right and left fuse and the headlight / dimmer switches provide the ground circuit. Both headlights are connected to one ground wire for high and one for low beam. So if one works and the other does not, the problem should be in the wiring before the headlight switch. Red is for high beam and red-white is for low beam. You should be able to jumper the red-white wire on the right headlight and make the low beam circuit for both sides work to test it.

Jan 22, 2014 | Geo Cars & Trucks

1 Answer

Turn signals went out

replace the fuses first. for turn/hazards.
the HAZ fuse 10 amps ., do hazards fail?????????

old car, very old. 1980 corolla.
first off, the lamps are brass based lamps. 115x lamps
they can short so replace them all or remove all of them
and put only 1 new lamp in (of the 4) if this works, good.
if not use a voltmeter to find the cause.
12v during a flash is good, 0v dead, 6v is shorted wires.
this is easy, dont panic, get the schematic for the car is best way.
The FSM has this but are rare for such and old car.

i looked online ,
and the schematic is there.
the path is from battery to ground as follows
10a haz fuse and 5am turn fuse. (2 fuse!)
the fuses drives the HAZ module
the HAZ module drives the lamps directly in HAZ mode
in blink mode the HAZ module drives the combo turn switch.
a bad flasher module KILL BOTH, (did it?)
the comb drives left or right side and the lamps are all grounded
completing the path of electrics, and the lamps glow.
current flows, and the lamps glow.

green-black is left
green-yell is left side.

the best test for this car, is to cycle the HAZ button over and over
until they work, most switches this old. 33 years are dirty and fail.
so cycle it. 10 times, if the HAZ fails.
it must work on HAZ or its all a wasted effort.
because the HAZ module feeds the binkers...

Jan 20, 2014 | 1980 Toyota Corolla

2 Answers

Geo Metro Turn signals not working. Replaced the turn signal relay switch but that did not correct it. Is there a way to decipher the problem without taking it into a mechanic as I do not have the finances...

Ok issues 1 and 2.
all 4 LAMPS fail, you didnt say?
does the emergancy flasher flash 1 or 4 lamps.
Emg.has its OWN fuse too.......
not stating this ,makes help , very hard.

suz, parts are expensive , just like shop labor.....
are you saying 4 new lamps is overbudget? really?
but diagnosis is free with a DMM. a $20 tool got it?
the first step in all electrics , are the fuses all good>?

first off , it can only be 3 things, Macro analysis.
1: bad lamps. (they open and short , replace 1 by one to find the shorted one, test lamps across the car battery with gloves/goggles.
2: bad wiring, trailer wiring from H3LL? look , inspect all blinker wiring. all 4 corners for collision damage or the work of hackers.
hackers are like , trailer wiring , jokers, do horrid damage.
LOOK , you see non stock wiring, bingo its HACKEd.
fix that, and win, make it like new, and well, it might last.

3: that leaves the combo switch and blinker module.
the module fails rarely, sad you guessed this first. its dead last.
a good module MALFs if it loses power or ground,that\'s not its fault.
The module good, malfs if the lamps are open or shorted.
it takes 1 good lamp on each side for the module to work.
if all lamps are removed and the module clicks this is normal
on modern car, (electronic module, some are silent "transistors")

so to find this easy, after the wiring inspection and fuse checks.
what do you do, i guess no DMM so we work tool free.
until needed.
1: remove all 4 lamps.
2: test them all with a battery. do the all glow? easy huh?
if the base is loose they are trash, and will short and make a fire, or blow the fuse. do not use are test shorted lamps...
if youput a shorted lamp across a batter it will melt the test wires.
that is why the FSM states, and I quote, use a fused jumper wire
with an inline 15amp fuse, these are all facts and reality.

3: if the filament looks open , then okay, it is , more trash.
4: next try just 1 lamp at a time inserted in each corner of car.
1 good tested lamp.
does if flash when asked, buy the blink lever or Emergancy main switch? yes or no.
yes, then put then rest back in 1 at a time, and see that they all work. do they or did the fuse blow, (shorted lamp)

no? flash, ok, leave that 1 lamp in.
at this point only tools solve this riddle, that tool is a DMM.
it costs $20 whole bucks,
set the dial to volts. if a fixed ranged meter use 20v range.
the car has a wiring diagram.
if you like doing car repairs book free, or alldata dot com , free
you will fail, i do, and have vast experience (retired puke i am)
there is one more way , sans meter. to solve this riddle
that is called hot wiring.
you look at the diagram of the flasher system.
I will call the blinker module, just the module.
see link here..... the real deal....
it is simple....
it a serial chain, a serial circuit.
if the this chain is broken the lamps are dead.
I use a volt meter, always, but if not having that.
you can hot wire this circuit with risks, (why i use a meter)
i will the hot wiring from simple to hard,
the schemic above clear.
find the blinker combo switch pig tail connector.
its below the column (steering (between knee caps)

the left blinker out. is
Green-red that means green body red stripe !
dots mean nothing here.
I hot wire that wire and the left side of car glows.
ok lamps and wires good, i body
hot wire, Green /yellow at combo connector.
the right side glows as I hot wire, ok, right side is 100% good.
now we go to the combo solid greenwire (all USA colors)
this is input to the combo blinker,
if I move the lever left , left glows, and if I move right, right glows,
no, not blink, glows......!!!
ok we have the problem and is in the dash and not the body blink wiring. all in 5mins work.
easy huh> (I use back probing probes and fused jumper as the FSM clearly states, no burned fingers from on fire wires. not me,.
how about you?
I hot wire, green wire (solid) at the module.
Module means the 3 pin blinker modules, some cars this is hard.
i hot wire the green and the above green test is the same here.
I then how wire the module yel/org/blue wire.
this is 12v input.
if the lamps blink now, key off, on demand (lever action)
then the combo binker switch is bad.
to prove that (did above) then you hot wire the models solid yellow wire, and the blinkers are dead,
yes? then the combo is dead.
no? they blink then the fuse was blown all alone.
the 10am fuse with the yellow wire. is blow, its IGNITION ON.
or if the fuse is blown the the ignition wire to this fuse is blown.
but if car runs, its not a bad ign, on wire.
if you have a volt meter all this is more simple and safer.
you measure the voltage,
and see pulsing 12v at lamps.
see 12v at yel./org,/blue at module.
and 0v on the modules black wire when blinking, if not 0v
the ground is broken.
you then move the meter to green module wire, it must pulse
blinking is 0v, 12v,0v,. 12, repeated for ever.
if the blinker has 12v at 12v pin key on, and ground is 0v and the output is 0v solid the blinker module is bad.
if the voltage is low, the body wires are shorted.
if the blinker Green wire pulses, and the lamps dong glow.
then the combo Gr/R /G/y , Green switch is dead.
if the green toogles, pulses keyon, at combo connector green
and the 2 ouputs are dead, the switch is mangled inside.

that is it. I showed 2 ways, and not guessing. the 3rd.

sorry for long post but you , needed both ways of 3.
i skipped guessing, way 3.

Sep 23, 2013 | 1992 Geo Metro

1 Answer

03 chevy venture rt.front parking light&turn light don't work replace bulb&socket

The rapid flashing occurs because of the light problem. If the 20A PARK LP fuse in the underhood fuse block is OK, the front marker lamps and the park lights should turn on when you set the headlamp switch to PARK. If the 10A T/SIG fuse in the instrument panel fuse block is OK, and the ignition switch is on, moving the turn signal multi-function switch to signal a right or left turn should cause the turn signals to flash. If this doesn't happen, check for a missing ground connection to the socket you replaced and check to be sure the replacement lamp was not forced into the socket backwards (it happens).

Sep 17, 2012 | 2003 Chevrolet Venture Passanger

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