[W126 Coupe] Dash lights

[Dick Spellman]

Jack Emery wrote:

> My '86 SEC 420 which came from Hong Kong, does not seem to have a 

> rheostat device to adjust the brightness of the dash lights. Is this 

> normal? There is one on my son's 1972 6.3.

> Also my passengers seat adjustment won't raise or lower (it is stuck 

> in the highest position) the other adjustments work OK. Could this be 

> a fuse or is something jammed?

>         Jack OZ

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Hi Jack:

Dash dimmer can't help.  On the seat, try working the door switch firmly 
in both the up and down position several times.  It just may be that the 
switch needs to be cleaned.  Don't push where it breaks but, work the 
switch hard from one stop to the next up and down.

If this does not work, next check and rotate fuses 15, A, & B.  Then 
slide the seat rearward and check the plug in harness.  Failing any of 
these remedies, slide seat forward all the way, unblot the floor bolts 
(2); slide the seat rearward and unbolt the front floor bolts(20.  
Unplug the harnesses and vacuum line.  Remove the seat.  Then using a 
12VDC source (brown is common) run through the harness pin-outs to see 
if you can get that motor to fire.  There are two motors under there and 
both have a cable set-up.  I've had one where the seat switch caused the 
motor to turn and the cable fitment was loose so the seat would not move 
properly.  You've just got to pull the seat and work the various 
electrical connections to see if it's the seat or the door switch.

Let me know what you test and learn.

Dick