Electric window problems

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phil350

New Member

Posts

4

• Apr 15, 2009

• #1

Mark - thanks for the reply
I assumed the motor would be earthed through its body and the two connections to the motor would be to power up and down?
As mentioned there is only a voltage measurment to one of the terminals when the switch is in the down position.
I will try a connection directly from a battery to check condition of motor, any other advice in this area would be greatly received.

 

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MartinBird

New Member

Posts

112

• Apr 15, 2009

• #2

i haven't had a look at a wiring diagram but i think the polarity is reversed to operate the motor in each direction, so the two wires, one should be + one - this will make the window go up, and visa versa on the wires to go down!

 

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phil350

New Member

Posts

4

• Apr 15, 2009

• #3

When I tested the pasenger side with a meter - neg.to earth there was a supply on each of the terminals separately, one when the swith was in up postion and on the other terminal when in the down?
what I don't know and can't seem to find is if there is a rwelay fro the front windows.
I can here a relay sound coming from thec passenger foot well, but wehen dropping the cover there seemed to be two units side by side but no sign of relays?

 

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Mark Disco

New Member

Posts

1,094

Location

Bournemouth

• Apr 15, 2009

• #4

your correct Martin - the +ve changes depending on which way the switch is pressed, so both wires are +ve at different times. the electric windows have 2 relays, later models (after march 94) have a window lift control unit up behind the glovebox, not sure if this ecu replaced the relays or not?

 

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Dave 2000

Active Member

Posts

648

Location

Spain

• Apr 19, 2009

• #5

Don't forget you can have a multimeter showing volts when you operate the switch but if you do not have amps then nothing will work!

regards

Dave

 

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MartinBird

New Member

Posts

112

• Apr 19, 2009

• #6

phil350 said:

When I tested the pasenger side with a meter - neg.to earth there was a supply on each of the terminals separately, one when the swith was in up postion and on the other terminal when in the down?
what I don't know and can't seem to find is if there is a rwelay fro the front windows.
I can here a relay sound coming from thec passenger foot well, but wehen dropping the cover there seemed to be two units side by side but no sign of relays?

Click to expand...

if theres a supply mate, chances are its the motor.......

 

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RichyMondy

New Member

Posts

37

• Apr 19, 2009

• #7

I have the same problem. On every window! Although i've only tested to see if there is a power spply to the switches. On the switches there are 5 poles. 2 being negative...
The middle pole has power going to it... But when the switch is put in either direction, the power isn't received on the other pole. And it dissapears from the middle one.
Proper frustrating...