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E-Class (W124) 1984-1995: E 260, E 300, E 320, E 420, E 500 (Includes CE, T, TD models)

Temperature Sensor and Lamps Faults.

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Old Sep 13, 2006 | 07:01 AM
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Falconeer
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Mercedes Benz 300E, 1991
Exclamation Temperature Sensor and Lamps Faults.
Hi,

I got new faults now. The temperature sensor a few days ago started reading negative and now dies out about 5 seconds after I start the car. Also, as soon as I turn on the lights, the Lamp-Out warning light comes on.

Please Help!

Falconeer.
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Old Sep 13, 2006 | 12:02 PM
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mgw_300e
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the "lamp out" light senses amperage changes (or is it volts or watts?) throughout the light wiring. Sometimes if you use bulbs that are different enough from stock, it will set off that light even though nothing is out.
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Old Sep 13, 2006 | 05:12 PM
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1996 C36 AMG, 2013 Dodge Dart Turbo 6spd
i have the light on as well but i know it's cause one of the Licence plate lights is out, i'd go around and check all your bulbs to make sure they are working that way you know it's not a burnt out bulb, since that's an easy 3 minute job.
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Old Sep 13, 2006 | 07:07 PM
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^^^Most practical suggestion. Check your tailights. As for the temp. reading, the sensor might be gone, it's next to your front license plate. (right side)
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Old Sep 13, 2006 | 08:04 PM
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i dont recall where i heard it from but the car measures amps/ ohms/ resistance (?) across the lights and can detect when a new light is plugged in with an old one. and that slight difference between a new and old bulb is enough to trigger the idiot light

try a new sensor for your temp sensor.
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Old Sep 13, 2006 | 08:13 PM
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mgw_300e
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Originally Posted by neanderthal
i dont recall where i heard it from but the car measures amps/ ohms/ resistance (?) across the lights and can detect when a new light is plugged in with an old one. and that slight difference between a new and old bulb is enough to trigger the idiot light
Did you hear it here, maybe?

Originally Posted by mgw_300e
the "lamp out" light senses amperage changes (or is it volts or watts?) throughout the light wiring. Sometimes if you use bulbs that are different enough from stock, it will set off that light even though nothing is out.
Just kidding buddy. Where have you been, I haven't seen you posting too much recently.
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Old Sep 14, 2006 | 04:27 AM
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Mercedes Benz 300E, 1991
Hi Guys,

Got the temp issue solved. The sensor had its wires somehow cut. I just cut them more and re-attached them. Everything is sine now.

The STUPID LAMP WARNING IS STILL ON!

Thanks though!

Falconeer.
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Old Sep 14, 2006 | 11:25 AM
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dont forget to check the tiny bulb on the very side of the brake lamps. Those go out most often and they are hardly noticeable. The car should light up in the back so you can see it from the side.
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Old Sep 14, 2006 | 05:31 PM
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Originally Posted by mgw_300e
Did you hear it here, maybe?



Just kidding buddy. Where have you been, I haven't seen you posting too much recently.
im recovering from a rugby injury, chest contusion/ bruised sternum/ whatever else they can think of that means "we couldnt see anything actually wrong so we just hope your body will heal itself." pretty doped up, monster pain when i cough and thank god i havent had to sneeze yet. im pretty sure all the painkillers in the world couldnt abate that. but nothing broken. im a little off though, as i wouldnt have posted if id seen your post above. thank the meds for that.

im gonna go back to bed.
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Old Sep 14, 2006 | 05:55 PM
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Crap dude, sorry to hear that. Hope you feel better!
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