Wiper/washer issue

[F1hydro]

Hi all, 

I've discovered I have no working intermittent wipers or washers, I say discovered as it was the first time I've had need to use them since buying the car. 

So far I have checked the fuse circuit, checked the washer relay activates and can pass current, checked the pump with direct voltage and all check out OK. 

Is there anything else I should be checking, or does that mean something in the BCM is buggered and a new one required? 

 

Thanks

Robin

[ShortPaul]

Possibly the stalk control arm just a guess 

[F1hydro]

All other operations on the stalk work, is it likely or indeed common for just two functions to fail? The intermittent does work if I adjust the frequency dial, the wipers will do one cycle every time the rotary switch is moved. 

 

[Stutopia]

Relay and fuse were my best guesses, any sign of water, either current or historic, around the BCM?

[ZMANALEX]

All parts are in stock, including BCM and wiper stalks.

 

Just DM me if I can help further.

 

Alex.

[F1hydro]

1 hour ago, Stutopia said:

Relay and fuse were my best guesses, any sign of water, either current or historic, around the BCM?

Yep, those and the pump itself were my guesses as well but they all check out OK. 

If I'm correct BCM is on the righthand side of the drivers footwell? If there was water ingress I'd like to think I'd have noticed, as that's where I recently placed my crossovers. Its worth another look though. 

Are BCMs prone to issues on the 370?

[Stutopia]

On 19/10/2025 at 21:09, F1hydro said:

Yep, those and the pump itself were my guesses as well but they all check out OK. 

If I'm correct BCM is on the righthand side of the drivers footwell? If there was water ingress I'd like to think I'd have noticed, as that's where I recently placed my crossovers. Its worth another look though. 

Are BCMs prone to issues on the 370?

Not that I’m aware of, but it’s a place to look given all the others are done. After that you’re into multimeter and checking for signal.