One For Qualified Auto Electrician?
The panel displays on my Merc C180 dim when the lights are turned on. The other morning they went abnormally bright when the starter was operated. Sometimes they vary of their own accord, usually being rather dim. Just had dealer service, but this was totally routine and the last fault has been evident before. Any ideas please?
Should add last fault has been evident for years!
Bob. Are we on to something? The rheostat does not affect radio/aircon/computer displays at all. It only works the speedo etc illumination, which does not seem exhibit the faults.
if its the panel lights, as in the lights in the dashboard. well, thats controlled by this little device called a rheostat. basically a rheostatic voltage regulator. in lamins terms, a dimmer knob. it could have gone bad. replace that first. i doubt very much so its the voltage regulator in the alternator.
Talk soon,
Joe Beaven
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kuntryguyy Says:
voltage regulator in the alternator. Replace the alternator.
References :
Posted on November 30th, 2008 at 1:59 pm
bob1242431 Says:
if its the panel lights, as in the lights in the dashboard. well, thats controlled by this little device called a rheostat. basically a rheostatic voltage regulator. in lamins terms, a dimmer knob. it could have gone bad. replace that first. i doubt very much so its the voltage regulator in the alternator.
References :
Posted on November 30th, 2008 at 2:26 pm
bobweb Says:
Before you can diagnose electrical problems, you must make sure your battery, charging system and battery cables are tested ok. If your battery is over 4 years old, replace it. Remove and clean the battery cables inside the connections using the wire brush type below. Then have the battery and charging system tested at your local auto parts store.
http://www.jcwhitney.com/autoparts/Product/Pr-p_Product.CATENTRY_ID:2010636/c-10101/Nty-1/p-2010636/Ntx-mode+matchallpartial/N-10101/tf-Browse/s-10101/Ntk-AllTextSearchGroup?Ntt=battery+post+cleaner+brush
http://www.ehow.com/how_512_replace-car-battery.html
References :
http://www.aa1car.com/library/2002/cm10220.htm
Posted on November 30th, 2008 at 2:55 pm