Rear wiper & wash

[tomcat59alan]

Then you have to stick your tongue across the pins!

Advanced diagnostics ??

 

[wammers]

Look at RAVE, follow the circuit, find out which colour wire on the correct plug is supposed to be live to switch wipers, insert a glass headed pin into wire, probe with multimeter.

 

[domino]

Look at RAVE, follow the circuit, find out which colour wire on the correct plug is supposed to be live to switch wipers, insert a glass headed pin into wire, probe with multimeter.

To identify the correct plug you need access to the BECM...? To see the thing, I mean.

Edit: Also, looking at RAVE, the wash and wipe don't appear to be immediately connected (i.e. 2 different interfaces in the BECM) so with neither of them working, would it indicate an issue nearer to the BECM? Afterall, the pump isn't controlled via wiring in the rear of the car but at the front. Right?

 

[wammers]

To identify the correct plug you need access to the BECM...? To see the thing, I mean.

Edit: Also, looking at RAVE, the wash and wipe don't appear to be immediately connected (i.e. 2 different interfaces in the BECM) so with neither of them working, would it indicate an issue nearer to the BECM? Afterall, the pump isn't controlled via wiring in the rear of the car but at the front. Right?

You will have to take the seat out. Have a scan of this. http://www.nanocom-diagnostics.com/downloads/1556252923.pdf

 

[domino]

So.. forgive me for being stupid but I can't find anything in RAVE that indicates how I go about getting access to the relays in the BECM so I can start testing..?

I don't have to remove the seat to replace/test a relay do I?

You will have to take the seat out.

Oh well, it can stay wiperless for the foreseeable future!

 

[domino]

Just come across this:

RANGE ROVER BODY (electrical) CONTROL MODULE (BECM or BCM) PROBLEMS PAGE

IN particular:

SPECIFIC BeCM fault symptoms include mis-operation of headlights, door locks, electric windows, fuel filler flap, indicators, sun roof and especially rear wash/wipe. These faults may be intermittent.

 

[wammers]

Just come across this:

RANGE ROVER BODY (electrical) CONTROL MODULE (BECM or BCM) PROBLEMS PAGE

IN particular:

Have you thought of putting diagnostics on it. May save you a lot of money.

 

[domino]

Welp, the diagnostics would cost me £400 to buy.. so not sure what would be more expensive right now

 

[Datatek]

Welp, the diagnostics would cost me £400 to buy.. so not sure what would be more expensive right now

Rear wiper not working could just as easily be the wires broken on the stalk.

 

[domino]

Rear wiper not working could just as easily be the wires broken on the stalk.

While I dig out the relevant sections in RAVE, is that easy enough/quick to remove and check?

 

[Datatek]

While I dig out the relevant sections in RAVE, is that easy enough/quick to remove and check?

Remove the plastics on the column, you should, I think, find a connector, with the aid of RAVE you can meter the stalk functions.

 

[domino]

Remove the plastics on the column, you should, I think, find a connector, with the aid of RAVE you can meter the stalk functions.

Yep, 5 screws to get the binnacle off and it's accessible straight away. That'll be tomorrows fun sorted!

 

[domino]

Hmm, wammers, as you're just..AMAZING, can you guide me (as though I'm as stupid as I'm making myself out to be) as to what colour wires, and where, I should be checking for continuity?

I'm going to tackle this tomorrow so want a bit of a head start before I delve in

 

[wammers]

Wiper switch plugs into connector CO278 99 and on C237 prior. Rear wipe is pin 1 on this connector Orange/Black to pin 13 BECM connector C1278 99 on C257 prior. Rear wash is Pin 8 CO278/C237 Light green/Black to pin 1 BECM C1278/C257. If switch is working pin 1 and 8 should ground to pin 6 on CO278/C237 when rear wipe or wash is selected.

 

[domino]

You're a star!

Cheers Wammers