Electrovalve Diode Repair

hirsty · Post by **hirsty** » 16 Nov 2008, 16:33

Have just checked inside my ECU holder in advance of inserting the diodes and find my cables don't match those shown previously. I have 2 large green/yellow spots. 4 red, 3 green and 2 grey.
I assume I take both diodes from green/yellow and connect to 2 grey.
Does it matter which green/yellow I use ?
Also tucked into the ECU box was a sheathed cable and two pin connector.
The connector is turquoise with a red stripe on it and the wires leading in are green. This is about 3-4 feet long so obviously should live somewhere else. Any suggestions ?

Post by **CitroJim** » 16 Nov 2008, 17:01

It's the grey ones you need and any of the green/yellow stripey jobs are OK.

If you want, take a note of the wire numbers on the grey leads and I can then confirm positively they're the ones. The last MK2 I did used grey wires.

Ditto the unused connector. See if you can see some wire numbers on the wires leading to it...

EDIT: the grey wires will be 7720, 7723 or 7730. I just looked at an Activa diagram which has an extra electrovalve and three grey wires. One of them is that one which you'll not have.

hirsty · Post by **hirsty** » 16 Nov 2008, 17:33

According to previous posts, the polarity is critical. Which end is +ive and which is -ive. (when fitting)

Post by **CitroJim** » 16 Nov 2008, 17:40

Yes it is Keith.

The kathode (banded end) of the diode must go to the grey wire.

Have a look at KevMayer's picture in this thread About half way down. This picture shows beautifully the diodes being fitted.