XC70 came up with 'position light bulb failure'. I checked and replaced failed bulbs but now none of the side lights or rear numberplate lights will come on. I have checked the fuses which seem fine.
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"position light" is a rear parking light which has failed or become unseated. Sometimes you can knock on the tail light housing and they will come back on, but they burn out shortly after regardless.
These and the low beam headlamps fail very frequently on these cars so you should become familiar with the replacement procedures.
Inspect Brake Light Bulb: The number one reason for a brake light operation failure is a failed brake light bulb. To check this condition access the bulb by removing the rear cover located in the trunk or rear compartment. Some cars allow you to remove the entire brake light lens to retrieve the brake light bulb. Once the bulb has been removed inspect the bulb filament. If it looks broken or if the bulb is smoked the bulb needs to be replaced. If you have replaced the bulb but it still doesn't work remove the bulb. With the key in the "on" position have someone hold their foot on the brake pedal and use a grounded test light to carful test the terminals inside the light socket. One of the terminals should illuminate the test light. (Note: Do not touch the outer metal ring that holds the bulb in place for it is grounded and can blow the system fuse if connected to the inner terminals.) If the test light illuminates reinstall the brake light bulb. While the brake pedal is depressed test the outer metal ring that holds the bulb, if power is present the ground lead from the light socket is bad. If the outer ring does not illuminate the bulb has failed and replacement is required.
Scan BCM for Trouble Codes: Some cars are equipped with a body control module or BCM this onboard computer controls and lighting signals and can malfunction not allowing the electrical current to continue to the brake light circuits. This condition is rare but it can happen. If you have performed all of the tests above and all results are positive scan the BCM for trouble codes if no codes are present try replacing the BCM.
Remove the bulb from its retaining clip contacts. If the bulb has
tapered ends, gently depress the spring clip/metal contact and disengage
the light bulb, then pull it free of the two metal contacts.
To install:
Before installing the light bulb into the metal contacts, ensure
that all electrical conducting surfaces are free of corrosion or dirt.
Insert the bulb into the holder. If the contacts have small holes,
be sure that the tapered ends of the bulb are situated in them.
To ensure that the replacement bulb functions properly, activate
the applicable switch to illuminate the bulb which was just replaced. If
the replacement light bulb does not illuminate, either it is faulty or
there is a problem in the bulb circuit or switch. Correct as necessary.
Install the cover until its retaining tabs are properly engaged.
Connect the negative battery cable.
Instrument Cluster Light Bulbs The instrument
clusters installed on these models are one of 2 types and distinguished
by the instrument lighting color, either green or blue. On models
with green instrumentation, only the control light bulbs are
replaceable. Should any other failure occur, the instrument cluster must
be replaced. On models with blue instrumentation, none of the
components are replaceable. Should a failure occur, the instrument
cluster must be replaced.
Position Bulb hailure is caused by the rear tail light bulbs, (the message is cryptic at best). I have had to replace my wife's 2006 xc70 about a half a dozen times. the problem I see is due to the holder the bulb sits in. It is a PAIN replace and seat properly so if there is a connectivity issue with the holder and lens assembly you'll get that message. I would typically see it when I hit a bump or stepped on the break. The message would flash intermittently and annoy me no end. Before you put the bulb\holder back in the light assembly, make sure that you apply some bulb grease and also check to make sure that the spring loaded terminals that make the electrical contact are not compressed or bent, if theat are you will continue to get the message even if you replace the bulbs, (becase the bulb was not the problem, the problem was the holder).
Bulb position light failure indicates that you have a burned bulb somewhere around the car. Check all of them. Brake lights, parking lights, flasher and so and so.
This is a very common problem with Volvo.
You could alo get this problem eventhough no bulb is burned. If it's the case, test each bulb contact in their socket playing with them. Make sure you put some electric grease on contact replacing the bulbs.
Check if there were a recall for your specific vehicule and if it has been done on yours. I know that during the years, some recalls were adressing this type of problem.
Regarding whistling noise during warm up try to remove oil filling cap during engine is running. if the noise stops it's probably the PCV that is blocked and need to be replaced. If it doesn't fix it, let us know and we will go more in depth.
Hope it helped
Dan
Bulb failure, position light means you have a burned out light bulb somewhere. I had the same problem on my 2002 s60. It looked like all the lights were working but I found out that there are several bulbs in the tail lights, so even though the tail lights were working there was in fact a burned out bulb. Look at the bulbs a bit closer and you will probably find one thats bad.
the position bulbs are located in the trunk and you access them the same way you access the tail lights im not sure what the bulb does but its a 10 dollar fix. FYI when you replace the bulb the message center will still tell you that it has failed you have to take it to the dealer to have them to erase the message (i just left mine it seemed a waist of money)
Its one of the park lights, usually the tail light is the one that goes out. There are two tail lights on each side, it usually the top one (lowest light in the upper part of the tail light assembly)
I believe the parking lights are the lights that come on when you move the headlight switch to the middle setting. My S60 has 3 settings for headlights, daytime running lights (off or 9 o clock position), parking light (middle or 10:30 position), and lights on (top or 12 o clock position). Put your light switch into the middle position and check the lights from the front of you car. They are usually located on the side of the headlights and are orange. If the fault is on, you have a bulb out (most likely) or loose wire connection (not as likely).
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