Yellow relay under seat ???

[keymandave]

Ok, so today I started getting to know the bike and wiring.

Under the front seat there is a yellow relay with wires

1 Thick red ( permanent live )

2 Thick Black ( earth ) Somebody has chopped into this at some point.

3 Thin yellow & black ( ignition live ) somebody has chopped into it at some point.

4 Thin Brown ( I presume another earth )

So, please,
What is this relay ?
Can I use these already chopped points to wire my 6 way fuse block to ??

Thanks in advance

 

[Steptoe]

Pull it out and try and start your bike...

 

[keymandave]

No, I don't fancy that. I'd rather know what it does first.

I haven't gathered any confidence with this can bus business yet. Still a bit wary off it.

 

[mikeyboy]

No disrespect fella,you have no understanding of the principles of the wiring on your bike,but you are going to tag on an auxiliary wiring harness and fuse box based on what some tosser on a forum suggests..

 

[oblertone]

You don't say what bike you're looking at, however as this is in the 1200 hexhead section I'll make an assumption; I may be wrong but didn't the canbus system do away with relays ?

 

[keymandave]

You don't say what bike you're looking at, however as this is in the 1200 hexhead section I'll make an assumption; I may be wrong but didn't the canbus system do away with relays ?

Hi, yes the bike is a 2005 1200 gs. I had read that there are no fuses or relays which puzzled me to find this one. I don't seem to be able to find it in any manuals, I was hoping somebody may off had a clue as it looks to be part off the BMW wiring loom.

 

[sproggy]

Just a wild guess here but Steptoe's comment is unlikely to be random - it's probably the starter relay?

But I'd second what others have said - if you don't understand the wiring, don't mess with it.

 

[Mistacat]

Steptoe gave you the clue. ( it is the starter relay, on later bikes it is under the ECU`s next to the spot light relays.
The thick Black wire is not an earth it is the +ve feed out from the relay to the starter solenoid. ( BMW bikes and cars tend to use brown for ground / earth).
Run the main feeds + & -ve from the battery to your main fuse block.
If you need any ignition controlled circuits fit relays after the fuse block and trigger them via the side / rear light circuit.
I prefer to use a miniature relay to control the coils on the ignition circuit relays.( less chance of upsetting the can bus and I also make use of the the N/C position on the miniature relay.

 

[keymandave]

Steptoe gave you the clue. ( it is the starter relay, on later bikes it is under the ECU`s next to the spot light relays.
The thick Black wire is not an earth it is the +ve feed out from the relay to the starter solenoid. ( BMW bikes and cars tend to use brown for ground / earth).
Run the main feeds + & -ve from the battery to your main fuse block.
If you need any ignition controlled circuits fit relays after the fuse block and trigger them via the side / rear light circuit.
I prefer to use a miniature relay to control the coils on the ignition circuit relays.( less chance of upsetting the can bus and I also make use of the the N/C position on the miniature relay.

Thank you very much. That is the info I needed.

 

[Steptoe]

The force is strong on this one.
Relay it is.
Yellow.
Starter, for the use of.

 

[keymandave]

Thanks Steptoe,
I've had a good play with the bike today. Had all the plastics off and getting to know what is where. I've also had a play with the wiring so a lot more confident that i'm not going to do major damage.

I think i'd read that many disasters before getting the bike i'd made myself worried to get stuck in, without talking to others with experience off the machine.

 

[tuftywhite]

Steptoe, did you used to write the clues for Ted Rogers' 321?

Inspired clueage.