D A V E ' S V O
L V O P A G E
Better and Faster Windshield Wipers
This should help with some common complaints
among many 240 owners. Here are some
suggestions to make your life better.
Referring to this diagram,
this will show you a very simple mod I have
done to my 240s over the years. By
swapping two wires on your wiper switch
(terminals 53 and 53b), you can reverse your
wiper switch function. This means when your
stalk is pushed to the first position,
instead of the slow (crawl) speed, your wipers go to
high-speed. Slow speed
becomes the second position instead of the
first. I never use slow speed anyway. This
modification also makes it so your intermittent
wipers run at high-speed. This
particular diagram to the left is for a 1985
240. I have noticed that on some other
year diagrams the wire colors are reversed.
Either way, terminals 53 and 53b are the ones
to swap no matter what. Try it out.
your 240 is a pretty old car. Wire connections
on 240s can get corroded over time and
have also been known to loosen up.
As a point of
maintenance in any older car, you should inspect electrical
connections (and grounds) on occasion to
make sure they look CLEAN and TIGHT.
The harness plug going to your wiper motor
under your hood has probably never been
checked. Now is a good time to clean it.
Unplug it and have a look.
And keep this
in mind . . . if you have ever found a melted
plastic connector anywhere in your car, it's
because of excess heat generated by high
resistance from a loose or corroded connection. So clean and tight connections are important.
a volt meter to check the battery voltage
while your engine is running.
voltage makes for slow wipers. Check your running voltage at the battery and then check the voltage to the power circuit at the wiper motor plug. This is the YELLOW wire. Most
lucky to put out 13.8 volts at the battery. Many
will be lower and some will be under 13 volts.That makes your wipers very sad and slow. Dirty,
corroded or loose power or ground connections
between the battery, starter or alternator and
things like your wiper motor and wiper interval relay can have a big effect
And always remember to check your grounds. So many people ASSUME their old ground
connections are good, but have you actually checked? Check for yourself!
CLICK HERE FOR
MORE GOOD INFO ON THIS.
| And speaking of that WIPER INTERVAL RELAY near your feet, it is often the victim of corrosion from moisture getting into the car.
Check it and clean the connector if you never have.
|WIPER MOTOR GROUND
You should be
aware that some 240 wiper motors use a separate ground
point to complete its ground
circuit. If your wiper motor is not
properly grounded, it can behave poorly.
Click here to see a useful discussion thread
about this: https://forums.turbobricks.com/showthread.php?t=309689
|You might also consider an adjustable
voltage regulator if you have less
than good charging voltage.. I prefer 14.2V to 14.7V
charging voltage if at all possible.
voltage regulators are AVAILABLE HERE.
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