Brake Sender Unit

[wbute]

Wouldn't rear discs require less pressure?
Holden service manuals might have the information.

[wbute]

Bimage.jpg
This is from the HJ service manual. The pressure switch is set the same for all brakes but discs have the proportion valve to prevent rear lock up.
You can't read it but it says
A brake differential switch is fitted to all models and illuminates a light on the instrument panel if pressure differential between front and rear brake circuits exceeds 120-170psi. On disc brake models the pressure switch is combined with a brake pro portioning valve.
So no doubt there many updates in the 10 years of production after this.

[SLR_dave]

Great work, but, doesnt discuss individual pressures for different body styles, (unless I read it wrong WB... it is sideways!). I think it just said that there is a proportioning valve on HJ if you have discs, it doesnt say much else?

[wbute]

Nah that's all but you need to look through all the manuals from HQ onwards for all the updates. I only have a couple.

[SLR_dave]

Yep, been doing that on what I have, I'm gonna bump my previous post though cuase its jumped off the page.

[wbute]

HJ wiring diagram lists single wire as standard on all models.