[W126 Coupe] All Indicator lightscome on when Braking

[Dick Spellman]

Doc wrote:

> Wierd. All my indicator lights start coming on when I brake.Radiator, 

> Parking Brake, Oil, (ALL)  etc.  After I stop braking they start to 

> fade out......absoluely weird.

> All along the bottom...except fortunate;y not the check engine.  The 

> only thing electrical that was done lately was the brake sensors but 

> that was 2 months ago.

> This just started today.

>  

> Anyone got any "go look ats"  for me to try?

>  

> HELP!

>  

>  

> lol

> Thanks

>  

> Rick Montgomery

>  

> ------------------------------------------------------------------------

>

> The MB Coupes Website!

> W126 SEC Mailing List

> Postings remain property of MB Coupes, L.L.C.

Ric,

Start with this as it is the most likely and the most cause for concern 
if you are on the road right now.

Stop the car.  Go look at the battery resting voltage at the batt 
terminals using a dc volt meter.  Start the car, kick on the hvac blower 
and see if the voltage goes up (alt probably okay but may be weak or 
failing).  If you should see an uptick in voltage on your meter 
indicating the alternator can produce a charge. If the voltage remains 
the same as when at rest or goes down you are likely running on battery, 
the alternator is dead and the reserve of the battery determines how 
many minutes you have left until the engine just quits.

Sounds like the familiar alternator failure where your are drawing off 
the battery and the output from the alternator is so weak you are slowly 
loosing the battery reserve.

Hopefully you are at home with the SEC and not on the road.

Dick