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I changed my 09 c350 ( w204 ) headlight assembly, once I was done with the repair and ready to turn the car on, the car wouldn’t start. I tried jumping it once then it came off saying the ESP and ABS is inoperative ? Any suggestions as to what could have happened ? Blown fuse ?
Describe what you did exactly to replace the headlight assembly. Im assuming the key was not in the ignition? Did you disconnect the battery at all? How did you remove the headlight, take anything off like the bumper?
Describe what you did exactly to replace the headlight assembly. Im assuming the key was not in the ignition? Did you disconnect the battery at all? How did you remove the headlight, take anything off like the bumper?
I changed the left side headlight ( driver side ). I removed only half the bumper which worked, indeed I did not leave the key on ignition neither disconnected the battery. Other than the bolts that hold the bumper as well as the grill nothing else was disconnected. Of course I did disconnect the factory harness that plugs to the headlight. That’s about it !!!
Today I checked the fuses one by one see if any of them were blown and they were all good. Interesting enough when I plug a jump box the battery reads at 12v yet when I disconnect the jump box off the battery the car is fully dead !!!
I’ll start tomorrow with the process of elimination and plug another battery maybe that’s the issue ?
A jump box is a booster to jump start the car? I’m just not familiar with the term.
Does the battery show 12.6 V on a volt meter or a multi meter? Or is it dead without the jump box connected?
If you have good battery voltage but everything else is dead, suspect a blown fuse in the pre-fuse block. But disconnecting the headlight wiring harness really should not have caused that.
If the battery is dead to a meter, you probably need a new battery.
Let us know the steps and results of your investigation.
I would start with solving the dead battery issue. A dead or even weak battery can cause all sorts of problem. How old is the battery? There should be a manufacturers date on it somewhere, may be stamped on the negative post.
I bought an inexpensive battery tester to use once in awhile just to give me an idea if theres any issues with the battery. Or can use a simple multimeter to check voltage.
Charging the battery would be great if you have a charger, if not jump it then drive around for awhile to try and charge it up.
When you jump start the car be sure to not connect directly to the battery. Use the jumper points, the ground lug on the strut tower and then the positive under the little red cover.
A jump box is a booster to jump start the car? I’m just not familiar with the term.
Does the battery show 12.6 V on a volt meter or a multi meter? Or is it dead without the jump box connected?
If you have good battery voltage but everything else is dead, suspect a blown fuse in the pre-fuse block. But disconnecting the headlight wiring harness really should not have caused that.
If the battery is dead to a meter, you probably need a new battery.
Let us know the steps and results of your investigation.
Ok guys so this was very odd. I brought a multimeter as well as a booster pump to see if the battery would go ahead and give me the specification voltage. It would read 12V which meant it isn’t fully charged but at least 90 percent capacity. Yesterday I went ahead and just bought a new battery for the sake of elimination process. The car in fact turned on and running good.
I would start with solving the dead battery issue. A dead or even weak battery can cause all sorts of problem. How old is the battery? There should be a manufacturers date on it somewhere, may be stamped on the negative post.
I bought an inexpensive battery tester to use once in awhile just to give me an idea if theres any issues with the battery. Or can use a simple multimeter to check voltage.
Charging the battery would be great if you have a charger, if not jump it then drive around for awhile to try and charge it up.
When you jump start the car be sure to not connect directly to the battery. Use the jumper points, the ground lug on the strut tower and then the positive under the little red cover.
Yes sir, I did the exact same procedure as given in the pictures as well as your instructions. Interestingly enough the battery would read me 12V when connected to the battery tester yet as soon as the tester was disconnected no signs of life from the car. I honestly just thought of going ahead and buying a new battery and sure enough the car turned back on… the headlight though is not turning on yet- I’ll be taking off again and check the factory harness pin points for current see if maybe the harness itself is done. I’ll update you guys on this as well !! Thank you guys I appreciate your suggestions !!
The instructions with the battery testers I have say to turn the headlights on for a a few seconds prior to testing. This will get rid of any surface charge.
is the entire headlight housing not working, no bulbs light up?
Can always unclip the headlight harness coming from the car and check for voltage, check the ground also. Brown wire should be the ground. if you are getting voltage up to the wiring harness then it may be an issue with the new headlight housing.
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