washers and wipers.....with a mind of their own.....

**p38arover** · 24th October 2006, 04:36 PM

Yes, it is annoying. My P38A does the same thing when it would have been so easy to program the BECM to turn the washers on first.

I assume the one-way valve in the washer line is working OK and not allowing the water to run back to the bottle.

Ron

**DEFENDERZOOK** · 24th October 2006, 09:48 PM

i just want to be able to squirt the water when i want....and wipe the glass when i want.....
not when lurch wants......

there are lots of times i just want the washers to work only.....then just one wipe.....
then one a few seconds later for those last drips......

i dont need lurch to do all my thinking for me......let me rephrase that.....
i dont WANT lurch to do all my thinking for me.......

i think.....

**ladas** · 24th October 2006, 11:57 PM

Originally Posted by DEFENDERZOOK

i

i think.....

Tony - see attached.

This would give you a way of washing indipendent of the main controls, but it would still give you the 'normal' control (ie wash then wipe auto) if you want it.

I don't think the pump warrants the need for a relay in between, but you can if you want.

**p38arover** · 25th October 2006, 12:01 AM

The problem with that circuit is that it backfeeds 12v to the BCU which may not be desirable.

I suggest you need to isolate the line to BCU when the push button is depressed.

Ron

**ladas** · 25th October 2006, 01:03 AM

Originally Posted by p38arover

The problem with that circuit is that it backfeeds 12v to the BCU which may not be desirable.

I suggest you need to isolate the line to BCU when the push button is depressed.

Ron

Yes you could be right - mind you it's getting late, ...............

.................but we can solve that with a diode on the feed from the bcu - that will stop any 12v backfeed.

I'll edit the drawing , thanks

**ladas** · 25th October 2006, 01:10 AM

Please see attached revised dwg with diode

**DEFENDERZOOK** · 25th October 2006, 08:10 PM

i just want to find the wire that activates the wipers when i press the wash button.....
then simply.......err.....modify?................it.... ...

**Quiggers** · 26th October 2006, 09:01 AM

Good luck there, Zook!

A water pistol maybe easier, by the sounds of it.

Or a bucket, when you're stopped in traffic, climb out the sunroof and pour it over!

GQ

**waynep** · 26th October 2006, 09:18 AM

Originally Posted by DEFENDERZOOK

i just want to find the wire that activates the wipers when i press the wash button.....
then simply.......err.....modify?................it.... ...

I think we're saying in this world of microprocessors and ECU its not quite that easy, unfotunately

. ie its all the thinking is done inside in the magic box, only one wire comes out of the box to the wipers and if you cut that you have no wipers at all.

**Scouse** · 26th October 2006, 09:34 AM

Tony,
The wipers are triggered through a LGB (light green / black trace, but I'm sure you knew that) from connector C0287 that goes to the wiper delay ECU.

According to GTR, connector C0287 is behind the centre of the fascia & appears to be purple in colour.
It has 20 terminals, 19 of which are used. The wires at the connector are coloured B, LGB, PN, P, NU - a few of each.
3 wires are LGB in terminals 7, 8 & 9. It's terminal 9 that needs to be disconnected.
The other 2 LGB wires come from the washer switch & to the washer pump.

PM me your email address & I'll send the info over. You can follow the wiring diagram yourself. I can't see disconnecting terminal 9 causing a problem as it's pretty straight forward.
Apologies for not doing this for you when you 1st asked. There's only one point of access for GTR here ATM

.

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