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#1
08-04-2003, 12:33 AM
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87420sel driver side window won't run
hello
got a question. the 87 420 has a non working driver front window. i have traded with known good switches. nothing. replaced the fuse that covers that window. nothing. is there a relay? and if that functions ok is there a test proceedure to prove the motor is faulty without tearing the other door liner off. any clues would be appreciated. tks craig
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Thanks Much! Craig 1972 350sl Red/Blk 117k 1988 420sel charcoal/Blk 140k 1987 420sel gold/tan 128k See My Cars at:http://mysite.verizon.net/res0aytj/index.html Pound it to fit then Paint it to match! There is only First Place and Varying degrees of last! Old age and deceit will overcome Youth and Enthusiasm every time! Putting the square peg in the round hole is not hard... IF you do it fast enough! Old enough to know better but stupid enough to do it anyway! 
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#2
08-04-2003, 03:07 AM
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I do not think there is a relay for the window motor, you already checked the switch and fuse next come to test the motor. Do you hear a click sound of any kind when you press the window switch?
There are 2 wires screwed to a connection box on the bottom of the door, towards the hinges. Put a volt meter on it and press the switch, if you are getting 12V then you have problem with motor. If you are not getting the voltage, start trouble shooting backward, becuase your motor is OK but some thing is wrong with circuit. Another way of testing the motor is to connect 12V to motor and see if it runs. HTH
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87 420 SEL Looking for a nice mid 80's MB diesel.  87 BMW 528e (Sold) 99 TOYOTA 4Runner 1989 Honda Accord (Sold) 1988 Honda Accord (Total)
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#3
08-04-2003, 11:39 AM
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Craig - As you face the fuse/relay box from the front of the car, you will see four relays/relay holders on the right side. The power window relay is the second from the front.
Immediately to its left is the power seat relay and it is identical (check for yourself). Try inserting the power seat relay in the window relay holder and see if the windows work before spending on a new one.
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#4
08-05-2003, 12:48 AM
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thanks gentlemen for the replys
i did find the relays and switched them and no window movement. when i get to work tomorrow i'll give the switches one more chance. thanks again. craig PS: thomas, the plates for the spring comps are done and they look pretty good. i'll have some free time towards the end of the week so i hope i can get the inner stem rods done.
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Thanks Much! Craig 1972 350sl Red/Blk 117k 1988 420sel charcoal/Blk 140k 1987 420sel gold/tan 128k See My Cars at:http://mysite.verizon.net/res0aytj/index.html Pound it to fit then Paint it to match! There is only First Place and Varying degrees of last! Old age and deceit will overcome Youth and Enthusiasm every time! Putting the square peg in the round hole is not hard... IF you do it fast enough! Old enough to know better but stupid enough to do it anyway!
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