Brake Light Relay?

Message

Dalemac · #1 Post by **Dalemac** » Mon Sep 27, 2010 3:14 pm

hi guys,
having troubles with the falco again. this time the brake lights are constantly on.

using the manual, i have tried to determine if/where the brake light relay is situated, but havent been able to find anything. closest thing i can find is a "diode module" - but i cant find much info as to what this unit actually is.

when the front brake is applied, the lights flicker once, but when the rear is pressed nothing happens.

faulty rear switch or is there a relay somewhere?

oh and i ahve checked the obvious like fuses and earths etc.

Dale

Aladinsaneuk · #2 Post by **Aladinsaneuk** » Mon Sep 27, 2010 3:25 pm

willing to bet it is a faulty switch

and i would guess the rear is the most likely

I would start by whipping it off and seeing if that is the culprit - and while off give it a good going over with wd40 and then try moving it

I have had one fail in a similar way in the past - exact same symptoms

Dalemac · #3 Post by **Dalemac** » Mon Sep 27, 2010 3:34 pm

Aladinsaneuk wrote:willing to bet it is a faulty switch

and i would guess the rear is the most likely

I would start by whipping it off and seeing if that is the culprit - and while off give it a good going over with wd40 and then try moving it

I have had one fail in a similar way in the past - exact same symptoms

Yes i agree - this is the second one to go now. However last time it failed, it was off, not on!

i wouldnt mind too much, but they are 20 quid a pop!

Dalemac · #4 Post by **Dalemac** » Mon Sep 27, 2010 4:18 pm

ok, defined the issue as the front brake switch actually!

new one will be here wednesday :)

Aladinsaneuk · #5 Post by **Aladinsaneuk** » Mon Sep 27, 2010 4:21 pm

glad you found the culprit

Willopotomas · #6 Post by **Willopotomas** » Mon Sep 27, 2010 6:09 pm

why assume everything is wired through a relay? The power consumption of the brake light won't be enough to need a relay.

Anyway. Glad the culprit has been identified.

D-Rider · #7 Post by **D-Rider** » Mon Sep 27, 2010 6:25 pm

Willopotomas wrote:why assume everything is wired through a relay? The power consumption of the brake light won't be enough to need a relay.

Indeed .... and even if you suspect it might be, 30 secs looking at the wiring diagram would show it isn't ....

the information is usually there if you look for it

Dalemac · #8 Post by **Dalemac** » Thu Sep 30, 2010 12:53 pm

D-Rider wrote:
Willopotomas wrote:why assume everything is wired through a relay? The power consumption of the brake light won't be enough to need a relay.

Indeed .... and even if you suspect it might be, 30 secs looking at the wiring diagram would show it isn't ....

the information is usually there if you look for it

As posted above, i looked and couldnt find it, but i also had no clue what some other things were like a diode relay. Its better to ask and be wrong than not ask and mess up completely right?

Anyway, replaced the switch, put the bits and pieces back on, and now it wont start. The clocks spaz out before the whole dask resets and the fuel injection resets, try to start again and it happens again.

What on earth have i done?

D-Rider · #9 Post by **D-Rider** » Thu Sep 30, 2010 1:15 pm

Charge your battery .... then try again and report back.

Dalemac · #10 Post by **Dalemac** » Thu Sep 30, 2010 1:25 pm

D-Rider wrote:Charge your battery .... then try again and report back.

Sorry, forgot to mention it was on charge :) been on for about half an hour, shouldnt be too long now.

anzacinexile · #11 Post by **anzacinexile** » Thu Sep 30, 2010 3:30 pm

Dalemac wrote:
D-Rider wrote:
Willopotomas wrote:why assume everything is wired through a relay? The power consumption of the brake light won't be enough to need a relay.

Indeed .... and even if you suspect it might be, 30 secs looking at the wiring diagram would show it isn't ....

the information is usually there if you look for it
As posted above, i looked and couldnt find it, but i also had no clue what some other things were like a diode relay. Its better to ask and be wrong than not ask and mess up completely right?

Anyway, replaced the switch, put the bits and pieces back on, and now it wont start. The clocks spaz out before the whole dask resets and the fuel injection resets, try to start again and it happens again.

What on earth have i done?

Sounds like you got your wires crossed somewhere, symptoms point to a partial short.

Pull it apart and check your wiring AND any potential shorts to ground

Dalemac · #12 Post by **Dalemac** » Thu Sep 30, 2010 5:46 pm

It was a bit reluctant, but after a few tries it started up nice and strong. :)

Must have just been a weak battery.

Carbtune should be here tomorrow, that will be fun!

Thanks for the help guys,

Dale