QuestionQUESTION: Hello Roland
I'm impressed by your knowledge and service. I live in Norway and have 94 LeBaron 3.0 LX. Running in a short summer, and a long strong winter. But I love the car and have used a lot of time to maintain the car. I have also dropped you a question on another site about stalling som years ago. But now the delay on the wiper don't work. It stopped to work last winter for some days as well, but then repaired itself, but now it seems to be a permanent stop. The wiper runs on Low, High and it stops when I swith off, but they do not run on delay. When they run in low and high I have to park them manually in "low" position on the windscreen. When I try to run them in delay I can hear the relay clicking in and out correctly inside the main control box (station 4) at the passengers feet, just as before when they were functioning (event hough I think the delay seems somewhat longer now). I have tried to measure at the terminal of the motor, and I have used some spray at terminals of the main computer box "station 4" at the passengers feet (but I have not opened that one yet.). I have also removed the motor, opened it by drilling out the rivets, and reassembled by normal small bolts which I drilled manually in the "beside" hole, next to the five rivets. Inside it looked quite well on the brushes, I cleaned it anyway, but couldn't find anything wrong. But I can't figure out how this thing works, and that makes it difficult to keep on tracking the error. I understand there is one brown/white wire for +12V for the low speed, and one red/white for the high speed. They seem to go directly to the motor itself, and through that to ground. But the two last ones, which I would expect had some parking function mechanically fitted inside the motor, and then going to motor itself, they seem just to be a break function for the main computer box (statoin 4) ? The Blue wire seem to bring constant +12V to the motor as long as the ignintion is on (measured ont the connector at the motor, without the motor connected). But the "track" that it hits on the "connection" plate inside the motors gearbox, seems to loose contact about 1cm for each round. While the other green wire, which through it's brush is connected to the rotating plate all the time, reads 0,2V (levelling to 0.25V when relays is switching and I measure on the plug at the motor without the motor connected). And inside the motor I discovered a third brush, that grounds the whole rotating connection plate a couple of mm every rotation. So I wonder; does this mean that when I turn to delay, the control box station 4, gives power to the Low wire (or high - don't remember which speed it used to run at delay), and thereby starts the motor, and then the control box through the blue wire puts +12V throgh the rotating connection plate, and then by the green wire measures back to the main control box when the wiper motor has turned almost one round, and then cut the power through the Low (or high) wire ? Why is then the third brush connected to the plate, once every rotation ? Is that because the control box, gives voltage even on low and high speed until one physical placement of the wiper in low position, and first then cuts the power, even if I have turned of the switch already ? If so, do you have any ideas for further error tracking. The motor runs, the relay ticks, the switch on the dash therefore seems to work. Is it the main control box or the realy on it, or have I missed some bad connection at the brushes inside the motor ? Hopeful for answers. Best regards- Frode Meinich
ANSWER: Hi Frode,
The electrical service manual for the intermittent wipers has several pages about the way they work and how to trouble shoot. The best thing would be for me to copy those and postal mail them to you as I don't have a scanner to send them via email. So tell me a postal address and I will do that.
It is very good of you to provide all that detail but I believe you may get more help this way.
Also, take a look at the vehicle identification number and tell me the letter that is in the 10th position which tells me specifically which model year the vehicle is. Sometimes the cars that are exported as nominally one specific year are actually the earlier year model. If it is like a US '94 the letter should be R.
Roland
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QUESTION: Hi
The 10th position is an "R", so I guess its a US 94.
I will be very gratefulful for a copy sent to
Frode Meinich
Sportsveien 3B
N-0382 Oslo
Norway
But how can I pay you for the stamps ?.
Meanwhile I have been thinking, and somehow (I can't figure out how right now) the rotating connection plate has to be connected to the anchor inside the motor (as is the low anh high wire. Then this will work more or less like any other wiper motor I have seen. Then a pulse at the green wire would make the motor turn, then the blue wire with cosntant +12V would take over, and hold power until the whole plate is grounded for a second in position where the blue wire don't hit with it's brush. This would also explain parking at Low and high speed, but I still can't figure out where my specific problem is, so I am looking forward to the copy anyway. Thanks so far. I will let you know if I learn anything as soon as I receive the copy.
Best regards
frode
AnswerBecause you don't have delay or park function it could be the control switch, the park wiring circuit could be 'open' or the motor could be faulty. I hope these pagea will help you sort it out.
No need to worry about stamps...it is my gift to you. I will also send the 2 pages that show the wiring diagrams.
PS Please 'rate' my answer. Thanks
