2005 Renault megane passenger elec window switch problem

[robbocop33]

I've tested power is getting to the electric window door switch, one of the wires is getting a feed. But when i press the switch none of the other wires illuminate to show the switch is throwing power out towards the window motor?
So, you automatically think switch is knackered, nope! Replaced it with second hand one, no go! Replaced it with new switch this morning, still no go? Anyone any ideas? Thanks!

Edited by robbocop33 on Wednesday 11th April 13:14

[GreenV8S]

robbocop33 said:

you automatically think switch is knackered

It might be a dodgy switch, but equally it might be a wiring fault, faulty control module or faulty lift motor. Better to test and locate the fault rather than assume and replace components that might be perfectly OK.

[robbocop33]

As i said previously i think i've ruled switch out. The black earth lead going to the switch, if this has broken somewhere, say between the door and the door pillar, would i still get the live feed i'm getting at the switch?

[LordLoveLength]

robbocop33 said:

As i said previously i think i've ruled switch out. The black earth lead going to the switch, if this has broken somewhere, say between the door and the door pillar, would i still get the live feed i'm getting at the switch?

Yes - but unless you are measuring volts with respect to *that* earth you still need to check that earth itself. Measure continuity to a known good eath point to test.
I don't know anything about megane electric windows. Does it have a passenger window switch for the driver as well? on a lot of cars the passenger switch is wired through the drivers switch pack to give driver overall control. (In some cases this is real wiring to/from the drivers switch pack, latterly it tends to be under software control).
But if I couldn't find problem at the passenger side I'd be looking at the drivers switches

[E-bmw]

^^^^Wot 'e said.

[robbocop33]

LordLoveLength said:

Yes - but unless you are measuring volts with respect to *that* earth you still need to check that earth itself. Measure continuity to a known good eath point to test.
I don't know anything about megane electric windows. Does it have a passenger window switch for the driver as well? on a lot of cars the passenger switch is wired through the drivers switch pack to give driver overall control. (In some cases this is real wiring to/from the drivers switch pack, latterly it tends to be under software control).
But if I couldn't find problem at the passenger side I'd be looking at the drivers switches

Thanks for that, on the driver's side there are two switches(its a 3 door megane 225 ibcidentally) so driver can control driver and passenger window. Passenger window activation from driver side doesn't work, neither does the single switch on the passenger side as i've mentioned.
I've looked at videos on Youtube, they simply test a single window switch for a live feed, which i'm getting, then they flick the switch and see if any of the feeds light up towards the window motor, if no wires go live to the motor they simply say switch is bad, then that's that in their book!
First of i'll check for wiring breaks on both sides between the doirs and door pillars, and continuity. Thanks.

[robbocop33]

Bit of an update for anyone thats interested, the saga continues! Heard online theres a little module unit that clips onto the window motor that is a common problem, so i bought a new one, problem 'half' solved now lol.
The window goes smoothly down, but press it up and window just jerks, however if i press up on the window bottom(with door card off) while pressing the window switch down a second, then up, i will eventually get it all the way up!??
Odd thing is window motor, regulator all work flawlessly when i short the wires in the loom!!
Only thing i've noticed is one pin in the multiplug for the motor was corrded, i have meticulously cleaned this with a piece of wire and lots of contact cleaner but no improvement?
Could one corroded wire cause this? Bearing in mind before hand i shorted wires up at window switch and window was smooth up and down?thanks if you've read this drivel. :-)

[GreenV8S]

I wonder whether there might be some sort of force limiter/over-current function which is being triggered when you aren't helping the window up, and also when there is a voltage drop in the switch. The fact it works OK when you bypass the switch suggests the switch isn't right yet. A voltmeter across the switch while it is operating the windows might show up a voltage drop causing the problem.

[robbocop33]

GreenV8S said:

I wonder whether there might be some sort of force limiter/over-current function which is being triggered when you aren't helping the window up, and also when there is a voltage drop in the switch. The fact it works OK when you bypass the switch suggests the switch isn't right yet. A voltmeter across the switch while it is operating the windows might show up a voltage drop causing the problem.

This is the thing that staggered me to start with, everyone says live feed into window switch, brilliant!, no power out of switch? Switch is knackered! , not true!
I've tried one second hand switch and two new Renault ones, doesn't make any difference.
One thing i thought about, conveniently just after i put all door card pieces back on, is some switches you have to reset, ie put window all tbe way down, hold switch down for a few seconds, same after window is all the way up, but, i had visions of opening window then the window wouldn't close! Too late in the day now to start buggering about taking door cards off and pushing the window back up!:-)

[robbocop33]

Tried to reset windows again but it didn't work, window just goes down and didn't come back up, a problem incidentally mirrored by people just having put a new Temic module on their window motors like i have(Happens on Clios, Meganes)
Just to add to the hilarity a put a new Renault master double switch on drivers door for a laugh, drivers window goes down, not up and passenger window does nowt! Put old master switch back on and im back to my present predicament, drivers side window perfect, passenger just goes down with both passenger switch and master switch, but not up lol.
I remember seeing clowns drive a car like this in a circus when i was 8!:-)Its not so funny now though!