headlight washers

MacRob · 25th September 2020, 20:40

hi everyone

Looking for advice regarding headlight washers.

I have retro fitted them to my 75 but still can't get them to work.

Do I need anything else apart from the jets, pipes and pump?

Many Thanks

trikey · 25th September 2020, 20:48

Quote:

Originally Posted by MacRob

hi everyone

Looking for advice regarding headlight washers.

I have retro fitted them to my 75 but still can't get them to work.

Do I need anything else apart from the jets, pipes and pump?

Many Thanks

You need the BBUS to replace the horn in the plenum chamber and a T4 session to alter the ZCS coding so the car knows they are fitted.

DO NOT plug the bbus in until you have the zcs coding changed or things get very noisy!

Schotten · 25th September 2020, 20:49

You’ll need battery back up sounder for alarm (fits in near side scuttle) and then a trip to see a T4 machine to get it set up. I’ve had all this done a few years ago mind, and the last 2 years it has stopped working so just a quick fix behind bumper to get it through MOT

MacRob · 25th September 2020, 20:50

Quote:

Originally Posted by trikey

You need the BBUS to replace the horn in the plenum chamber and a T4 session to alter the ZCS coding so the car knows they are fitted.

DO NOT plug the bbus in until you have the zcs coding changed or things get very noisy!

Go on, what is a BBUS?

trikey · 25th September 2020, 20:55

Quote:

Originally Posted by MacRob

Go on, what is a BBUS?

Battery Back up Sounder (A posh horn with a built in battery)

MacRob · 25th September 2020, 20:58

Quote:

Originally Posted by trikey

Battery Back up Sounder (A posh horn with a built in battery)

ok I have to ask it. What does a horn with a battery have to do with headlight washers?

trikey · 25th September 2020, 21:04

Quote:

Originally Posted by MacRob

ok I have to ask it. What does a horn with a battery have to do with headlight washers?

Its part of the circuit, without it they don't function.

MacRob · 25th September 2020, 21:07

Quote:

Originally Posted by trikey

Its part of the circuit, without it they don't function.

Is it a direct replacement or is there mods to be done

trikey · 25th September 2020, 21:10

Quote:

Originally Posted by MacRob

Is it a direct replacement or is there mods to be done

Plug and play

The wire for the BBUS will be hanging next to the alarm horn in the plenum.

MacRob · 25th September 2020, 21:11

Quote:

Originally Posted by trikey

Plug and play

The wire for the BBUS will be hanging next to the alarm horn in the plenum.

Wonderful. thanks very much

25th September 2020, 20:40	#1
MacRob Loves to post Rover 75 Saloon Join Date: Sep 2019 Location: Deal, Kent Posts: 264 Thanks: 44 Thanked 81 Times in 58 Posts	headlight washers hi everyone Looking for advice regarding headlight washers. I have retro fitted them to my 75 but still can't get them to work. Do I need anything else apart from the jets, pipes and pump? Many Thanks __________________ MG Rover South East admin

25th September 2020, 20:49	#3
Schotten Loves to post 75 Saloon Join Date: Feb 2007 Location: Glasgow Posts: 332 Thanks: 8 Thanked 10 Times in 10 Posts	You’ll need battery back up sounder for alarm (fits in near side scuttle) and then a trip to see a T4 machine to get it set up. I’ve had all this done a few years ago mind, and the last 2 years it has stopped working so just a quick fix behind bumper to get it through MOT