No Dash Lights 1975 mercedes 450 SEL - Mercedes-Benz Forum

 
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post #1 of 5 (permalink) Old 10-06-2014, 03:37 PM Thread Starter
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No Dash Lights 1975 mercedes 450 SEL

Any Clue what may cause this ? NO DASH LIGHTS
Whats been done so far . I Bought the car like this .
(1) turned Dash Light dimmer switch back and forth
(2) Checked for Fuse under hood > all ok Dash lights same as Parking and they work
****************
All Gauges are working in Instrument Cluster
Any Search for Cause Tip's Appreciated . By the way ? whats in their in the Cluster ? I hope not a printed circuit yuk .
With totally nothing working ( Lights ) I am thinking a Fuse / disconnected wire / a Bad switch .
I Kind of doubt all the bulbs are just burned out but is possible ?
Just thought I would ask before I dived in
Regards to the forum
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Last edited by aluminum; 10-06-2014 at 03:58 PM.
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post #2 of 5 (permalink) Old 10-06-2014, 04:27 PM
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No circuit board, just a resistor in the dimmer knob. New ones go for around $90, used $30 or so. Will require the cluster to come out.

Your Parts Search Returned 1 Part(s)

You're welcome. Again.

Felicita e un bicchiere di vino con un panino.
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post #3 of 5 (permalink) Old 10-06-2014, 05:02 PM
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the dimmer switch goes bad , you can bypass it with a wire at the 2 pin , so the light will be on .
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post #4 of 5 (permalink) Old 10-06-2014, 06:10 PM Thread Starter
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thanks the 2 Pin ?

Quote:
Originally Posted by agillot View Post
the dimmer switch goes bad , you can bypass it with a wire at the 2 pin , so the light will be on .
Thanks Much :
Question
just guessing but by bypassing the 2 Pin I expect your talking at the Resistor behind the Instrument cluster correct ?
***********************************
or is it ( this number 2 pin somewhere else perhaps ? )
I did this same thing on my 928 Porsche dimmer switch and got full power at the Cluster lights ( still very dim however ) and went for LED Bulbs
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post #5 of 5 (permalink) Old 10-12-2014, 08:59 PM Thread Starter
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resistor picknpull

Quote:
Originally Posted by flyboyike View Post
No circuit board, just a resistor in the dimmer knob. New ones go for around $90, used $30 or so. Will require the cluster to come out.

Your Parts Search Returned 1 Part(s)

You're welcome. Again.
Thanks I picked one up at Picknpull for free with a window regulator ( $20 ) from a 79 year model . was going to just run it full power but what the heck I changed the part .
I bit tricky working on the cluster but not so bad
thanks for the help
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