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How do i have to wire low brake fluid meter?
marcotuinenburg - 18/10/07 at 09:02 PM

Hi,

Another question.
I would like to wire the low brakefluidlevel meter. It's from a Sierra but the Haynes manuel is too difficult for me to understand the wiring, there are no colours used.

There are 3 wires coming from the low brakefluidlevel meter coming.

Brown
Brown/yellow
Green/brown - direct to earth ???

I Have to wire it to a Fireblade looM.
Hope you guys can help me again with this.

Thanks, Marco

eccsmk - 18/10/07 at 09:13 PM

im using the standard sierra low level cap and i ignored the middle pin
put one outside pin to earth the other to the earth side of my warning light then added 3amp ignition live to the other side of my warning light hope this is of help

bigrich - 18/10/07 at 09:16 PM

this is how i wired mine and also steve worX used the same

Rich

iank - 18/10/07 at 09:20 PM

quote:
Originally posted by eccsmk
im using the standard sierra low level cap and i ignored the middle pin
put one outside pin to earth the other to the earth side of my warning light then added 3amp ignition live to the other side of my warning light hope this is of help


You will need to wire in a test switch to pass SVA.
Either use a handbrake switch as ^^^ or a switch on the dash, you can use something more funky but that's the minimum required.

[Edited on 18/10/07 by iank]

marcotuinenburg - 18/10/07 at 09:36 PM

Oké, thanks for the help.
Without you guys i won't be able to build this seven.

Really thanks, Marco

blakep82 - 18/10/07 at 09:45 PM

you don't HAVE to have a red warning light for brake fluid?


[img][/img]

eccsmk - 18/10/07 at 09:53 PM

quote:
Originally posted by iank
quote:
Originally posted by eccsmk
im using the standard sierra low level cap and i ignored the middle pin
put one outside pin to earth the other to the earth side of my warning light then added 3amp ignition live to the other side of my warning light hope this is of help


You will need to wire in a test switch to pass SVA.
Either use a handbrake switch as ^^^ or a switch on the dash, you can use something more funky but that's the minimum required.

[Edited on 18/10/07 by iank]

sorry forgot to add the wire that goes from master cylinder to light is joined to my hand brake wire

02GF74 - 18/10/07 at 09:58 PM

sierra book shows:

brown - to ground (0v)
brown/yellow - to lamp
brown green - to hand brake switch

the two brown wires with tracer are connected together in the cap.

I have sierra master and using dvm find the conections not as per drawing - the h/b wire is the earth, the other two being common. (the seeds of doubt have been sown so I will retest ).

So check with meter or lamp as to how it is wired.

Basically in the cap there is a switch that maks contact betweeen all the wires if the fluid goes low.

so if the brown wire is 0V, connect one lead of a bulb to 12 V and other to say the brown/yellow.

the lamp lights when fluid is low.

now connect brown/green to one lead of handlbrake swith, the other lead to 0V. This will ground the bulb if
handbrake is on i.e. the bulb will light as the circuit is complete - also can be use to test the lamp.

iank - 18/10/07 at 10:08 PM

quote:
Originally posted by blakep82
you don't HAVE to have a red warning light for brake fluid?


Interesting, I believe the first test they do is to test the warning lamp by pulling off the cap.
This thread from 04 suggests that they accept the transparent reservoir as enough if you can see it while seated in the car

http://www.locostbuilders.co.uk/viewthread.php?tid=13472

Not worth the risk IMO for the cost of a warning light, a switch and the appropriate reservoir cap.

blakep82 - 18/10/07 at 10:13 PM

2004 SVA manual doesn't even say you have to see it from the driving position. just that it has to be a trnsparent resevior.

nfauto.co.uk have some nice looking float switches anyway, not like those nasty rally design ones!

flak monkey - 19/10/07 at 06:48 AM

I drew this up a while back. Should be simple enough to understand.



DarrenW - 19/10/07 at 08:02 AM

Doesnt the sierra resevoir cap have a switch built in - press the yellow bit in the middle.

matt_claydon - 19/10/07 at 08:10 AM

Yes, there is a test button the the reservoir cap, but the test facility has to be operable from the driver's seat.

mackei23b - 19/10/07 at 08:24 AM

here is my wiring for the brake fluid switch Rescued attachment Slide3.JPG
Rescued attachment Slide3.JPG

DarrenW - 19/10/07 at 08:45 AM

I just use handbrake to test the light from driving position - passed SVA no problem - no seperate switch required for me (same as Mackie's diagram). I guess the button on resevoir cap is to test the fluid level switch is OK as well as the light.

[Edited on 19/10/07 by DarrenW]

Vindi_andy - 19/10/07 at 01:05 PM

quote:
Originally posted by blakep82
you don't HAVE to have a red warning light for brake fluid?

2004 SVA manual doesn't even say you have to see it from the driving position. just that it has to be a trnsparent resevior.

nfauto.co.uk have some nice looking float switches anyway, not like those nasty rally design ones!


Would you want to risk not knowing that your brake fluid is low and therefore potentially about to loose your brakes

Do you look under the bonnet EVERY time you get in the car?

blakep82 - 19/10/07 at 05:07 PM

quote:
Originally posted by Vindi_andy
quote:
Originally posted by blakep82
you don't HAVE to have a red warning light for brake fluid?

2004 SVA manual doesn't even say you have to see it from the driving position. just that it has to be a trnsparent resevior.

nfauto.co.uk have some nice looking float switches anyway, not like those nasty rally design ones!


Would you want to risk not knowing that your brake fluid is low and therefore potentially about to loose your brakes

Do you look under the bonnet EVERY time you get in the car?


all i'm saying is thats what the manual says! I'm surprised too, because it says you don't have to have a light!

marcotuinenburg - 20/10/07 at 08:49 PM

Thanks all.
I wired it and it works.

Thanks, Marco