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Front lights are ON, after I press front brake

Started by MOTOMYSZOR, December 25, 2014, 10:13:51 AM

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MOTOMYSZOR

December 25, 2014, 10:13:51 AM
Today I discovered that after press front brake lever, rear and front lights and dash lights will go ON.

Recently I upgraded front brake, installed coil relay mod. But none of this should affect brake switch......

I have no idea where I have to start.....  :dash1:
We Are The People Our Parents Warned Us About

FJmonkey

#1
December 25, 2014, 10:21:33 AM
Quote from: MOTOMYSZOR on December 25, 2014, 10:13:51 AM
Today I discovered that after press front brake lever, rear and front lights and dash lights will go ON.

Recently I upgraded front brake, installed coil relay mod. But none of this should affect brake switch......

I have no idea where I have to start.....  :dash1:

"Recently I upgraded front brake, installed coil relay mod. But none of this should affect brake switch......
I have no idea where I have to start....."

What are the coils connected to? If you made electrical changes and suddenly you have electrical issues, where you start is where you made changes. 
The glass is not half full, it was engineered with a 2X safety factor.

'86 Ambulance - Bent frame, cracked case, due for an overhaul
'89 Stormy Blue - Suits my Dark Side

Pat Conlon

#2
December 25, 2014, 11:00:39 AM
Not sure of the EU version FJ's but on the U.S. models, the dash, rear, and head light are on when the ignition key is turned on....(unless the starter button is pushed)
1) Free Owners Manual download: https://tinyurl.com/fmsz7hk9
2) Don't store your FJ with E10 fuel https://tinyurl.com/3cjrfct5
3) Replace your old stock rubber brake lines.
4) Important items for the '84-87 FJ's:
Safety wire: https://tinyurl.com/99zp8ufh
Fuel line: https://tinyurl.com/bdff9bf3

MOTOMYSZOR

#3
December 25, 2014, 01:55:40 PM
I was check it again now. First few squeezes and everything was OK. But after that was "disco" again but only dash light, parking bulb on front and back light was ON. And after rear brake pedal press I have this same effect.
I suspect short circuit in back lamp.....
We Are The People Our Parents Warned Us About

biggo

#4
December 25, 2014, 04:05:21 PM
The first thing I would look at is your stop/tail bulbs.
You can get this effect if the 2 circuits short together.
I have also seen people force a single filliment 21watt bulb in and it shorts the two circits together giving the same fault.
Start with simple stuff first and change the bulbs  :good2:

Cheers  Phil
FJ1200 1994
XJ900F 1986

http://biggsbiking.blogspot.co.nz/

MOTOMYSZOR

#5
January 02, 2015, 01:43:36 PM
Quote from: biggo on December 25, 2014, 04:05:21 PM
The first thing I would look at is your stop/tail bulbs.
You can get this effect if the 2 circuits short together.
I have also seen people force a single filliment 21watt bulb in and it shorts the two circits together giving the same fault.
Start with simple stuff first and change the bulbs  :good2:

Cheers  Phil

exactly that happened.... one bulb had internal short circuit
We Are The People Our Parents Warned Us About
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