Leccy window problem (2023 Update)

If there is power to the motor when you press the switch, and nothing happens, then the motor is faulty. Make sure you are checking across both wires to the motor as the polarity will reverse depending on which way you press the switch. So you might have ignition power to both motor wires permanently (which would be normal) but the motor isn't getting an earth.

John

Sounds like it might have 'one touch' switches. A quick press, and the window goes all the way up or down, unless, as you say, switched in the opposite direction. A longer press, and the window stops when the switch is released. Mike.

That was my first thought. It works when it feels like it, it seems, and when it does work it works properly.

It did nothing until we tugged on the window itself. I wonder if the brushes are knackered? I assume the circuitry to stop the motor is inside the motor itself somewhere?

Si

Yes, it does have one touch switches but even with a longer press the window still continues to move when the switch is released until it is flicked in the opposite direction.

Do you know if this circuitry is inside the motor itself or is it in the relay box?

When the motor decided it wasn't going to work, the relay was still clicking and supplying power to it.

Si

Worn brushes then.

I think it might well be, ta.

Si

AFAIK the one touch control is separate to the motor, or window switch. I have no idea of exactly where it is, but the relay box sounds like a good place to look.

Have you made sure the window is not sticking in the runners. A stuck window will cause the motor to cut out. Just this weekend, one of my rear windows stopped working. A push on the glass whilst operating the switch and it was working again, but I'll give the runners a spray of silicone when I get round to it. It should help prevent it happening again. Mike.

There's no circuitry in the motor. It's a motor fullstop. You can spend the rest of your life guessing what's wrong with it or you can check for power at the motor with the switch pressed and find out if it's the motor or switch / controller / wiring. If you don't have a test light or multimeter, then power up the motor directly to see if it moves.

JOhn

I'm aware of that and I have tested it. There is power to the motor and it works perfectly well - sometimes. This leads me to agree with Conor's suggestion: that the brushes are worn.

Until I tested the obstruction-sensing feature the window worked fine for about 6 operations up and down; stopping and starting, all the way up and down etc. That's why I wondered where the magic gubbins was that stops the window if there happens to be an obstruction, because if the brushes on the £50+ motor are *not* worn then it is this that is at fault, not the motor.

Si

Saved myself over £200 on the price of a new Honda regulator from these people:

(was lucky enough that they had themin). If you need to replace it, would be worth a web enquiry (got a phonecall within 10 minutes of submitting it). Didn't solve my particular problem as it turns out, but I'd have wept if I'd just shelled out for the new replacement...

Noted. Thanks Richard.

Si

The controller cuts out the power to the motor if the current goes over a fixed threshold. If you can put a test light / multimeter across the motor wires and operate the switch Up and down untill it fails, you can see then from your test whether there is power there or not. If there is power and the motor isn't going anywhere, then simple: faulty motor. If the controller is switching off, then not so simple. You should be able to tell from the speed and noise of the motor before it stops if there is a fault. Otherwise you'll have to measure the current draw at that motor and compare it to the other windows. You'll need to do this at the controller or else take of the door panels.

John

The window control box is on the door panel on the UK R20. There have been some on ebay secondhand for about £50. I have exactly the same problem. This box is the likely problem. Swap one from another door and see if it changes the behaviour. Nuisance that it only goes fully up or fully down. Passenger door does NOT do this. That issue of intermittency may be a poor supply out of this control box! Could be a simply naff relay in that box increasing the circuit resistance.

After 18 years I think it will be on the scrap heap.

Tim