Am I right or am I wrong

Includes handbrake, cylinders, shoes, discs, rims and rubber.

Moderators: reidy, Blacky

Post Reply
User avatar
BILLY BLACKARROW
Posts: 1065
Joined: Thu Aug 21, 2008 9:22 pm
State: NSW
Location: NEWCASTLE MACQUARIE HILLS

Am I right or am I wrong

Post by BILLY BLACKARROW »

I have a hj / hz proportioning valve and need a brake fail light for the engineer's certificate

Image

I have a LED mounted in the instrument cluster how I think it works is power to the LED and earth through the LED to the terminal on the Proportioning valve when fluid is low it completes the circuit and the LED lights up is this correct or not if it's not can someone tell me how it works as I have tried to GOOGLE it without success
Thanks
BILLY :arrow:
BILLY BLACKARROW
MY Father always said do the hard part first --because when you are OVER IT you only have the easy part left to do THINGS I HAVE TRIED TO LIVE BY
User avatar
Harv
Posts: 5020
Joined: Mon Oct 08, 2007 2:00 pm
State: NSW
Location: Sydney, Australia

Re: Am I right or am I wrong

Post by Harv »

Billy,

That's how I understand it too - wired exactly like the rest of the idiot lights on an FB/EK (ie power to the bulb, then use the brake master terminal to provide the earth, the same as you use the temperature sender). Make sure you take power from the same place as the other idiot lights (turns off when the ignition is off), not constant 12V.

HQs were a little funkier and used a relay, but same deal. Shouldn't need a relay if you are using an LED. Wiring diagram for the 'Q here:
http://gallery.oldholden.com/Victas-Pla ... 94/album71

Cheers,
Harv
327 Chev EK wagon, original EK ute for Number 1 Daughter, an FB sedan meth monster project and a BB/MD grey motored FED.
User avatar
oz_ek
Posts: 429
Joined: Sat Oct 31, 2015 8:22 pm
State: VIC
Location: Victoria

Re: Am I right or am I wrong

Post by oz_ek »

I notice the sender on my 79 HZ ute has two wires and two poles on the sender, I assume the sender acts as a simple switch.
brake fail switch.jpg
brake fail switch.jpg (83.25 KiB) Viewed 2264 times
Blacky
Posts: 12171
Joined: Tue Jul 20, 2004 8:58 am
State: WA
Location: up in the Perth hills

Re: Am I right or am I wrong

Post by Blacky »

according to that diagram it switches to earth if one side of the brake circuit fails , o power to the globe, earth wire to the switch and you are done.
When you're faced with an unpleasant task that you really don't want to do, sometimes you just have to dig deep down inside and somehow find the patience to wait for someone else to do it for you.


Foundation member #61 of FB/EK Holden club of W.A.
User avatar
Harv
Posts: 5020
Joined: Mon Oct 08, 2007 2:00 pm
State: NSW
Location: Sydney, Australia

Re: Am I right or am I wrong

Post by Harv »

oz_ek wrote:I notice the sender on my 79 HZ ute has two wires and two poles on the sender, I assume the sender acts as a simple switch.
brake fail switch.jpg
You are correct. HZ is similar to HQ - power to globe, wire from globe to sender unit, them sender unit switches the earth. The only difference is that the HQ sender earths out through the switch body (doesn't need a separate earth wire), whilst the HZ sender sender switch body is insulated (needs a separate earth wire). Wiring diagram is here (switch is item 38):
http://www.mysandman.com.au/forums/show ... ams-please

Cheers,
Harv
327 Chev EK wagon, original EK ute for Number 1 Daughter, an FB sedan meth monster project and a BB/MD grey motored FED.
Mick
Posts: 4101
Joined: Sun Sep 26, 2010 8:47 am
State: NSW
Location: Coffs Harbour NSW

Re: Am I right or am I wrong

Post by Mick »

i've been told that isn't a proportioning valve also (i always thought it was) but just a switch for the brake fail light
sometimes yor just better off shitting in yor hands and clapping

W.S.C.C.A
Woodstock chapter
User avatar
Craig Allardyce
Posts: 1464
Joined: Sun Aug 07, 2011 7:26 pm
State: VIC
Location: Stratford

Re: Am I right or am I wrong

Post by Craig Allardyce »

I think if its a 4 port parallel housing its a distribution block. 5 ports, larger internal piston at one end with single line to rear brakes and two in and out for the front brakes would be a proportioning valve i.e. different piston sizes in the one housing indicates biased fluid flow/pressure to either circuits.

http://www.gmh-torana.com.au/forums/top ... ing-valve/
User avatar
oz_ek
Posts: 429
Joined: Sat Oct 31, 2015 8:22 pm
State: VIC
Location: Victoria

Re: Am I right or am I wrong

Post by oz_ek »

it is a proportion valve/block. Billy, I've been wondering what your brake set up will be, disc/disc, disc drum?......As these proportion valves have different 'crack pressures' depending on the type of vehicle it was originally fitted to, ie: ute, sedan, Statesman, etc.
User avatar
BILLY BLACKARROW
Posts: 1065
Joined: Thu Aug 21, 2008 9:22 pm
State: NSW
Location: NEWCASTLE MACQUARIE HILLS

Re: Am I right or am I wrong

Post by BILLY BLACKARROW »

Thanks for all your comments , it just proves that I can be right sometimes even though my wife says otherwise
oz_ek it is disk front /drum rear and the setup came of a HZ sedan engineer is happy with that and I don't need a brake test as it is a proven system so less expense for me
BILLY :arrow:
BILLY BLACKARROW
MY Father always said do the hard part first --because when you are OVER IT you only have the easy part left to do THINGS I HAVE TRIED TO LIVE BY
User avatar
oz_ek
Posts: 429
Joined: Sat Oct 31, 2015 8:22 pm
State: VIC
Location: Victoria

Re: Am I right or am I wrong

Post by oz_ek »

If you do find the rear brakes are locking too soon, try a valve from Statesman, from memory I think the Statesman had a crack pressure of around 450psi
DOLLER60
Posts: 114
Joined: Thu Jan 08, 2015 11:36 am
State: VIC
Location: In between.... (VIC)

Re: Am I right or am I wrong

Post by DOLLER60 »

Yeah I did the same research and my engineer told me any valve from a similar sized vehicle is fine-I went torana for memory
Post Reply