Know about relays? I need some help - urgently

[rapid van cleef]

some great advice here guys, thanks so much

someone has just advised me that i should use a relay with a protection diode in it. seeing as my bike has an ecu and there is some sort of 'emf back spark' that can be created by the relay going on and off and possibly bugger my ecu.

[FJRider]

oh yeah, i was just thinking, if you look at the color of the wire to the tail light as it goes into the actually tail light, you can probably check the wire at the fuse box is the same, there not always, but if it is then thats a good sign you brobably have the right one.
also for joining wires, if you cannot get into the back of the fuse bot or anywhere else that you can connect to at an existing join, you can strip away some of the insulation, solder a wire on, and then tape up the join. it's tricky but possible. try on some old bits of wire first.

DON'T think ... it will only confuse you ...

"Probably right" means ... you still don't know ... for sure ...

Perhaps a workshop manual may be a good investment for the OP ...

Solder is SO yesterday ... Crimp and GO is TODAY ... GET WITH IT ...

[glegge]

interesting, if it where me i would not worry to much as i think pushing the start button would probably cause more back EMF. anyway - not wanting to get into a technical discussion. so up to you really.
also you could put a diode across the relay coil on the outside, this would do the same thing (just means you would have to get the positive/neg wires going to the relay coil the correct way around.)
anyway - i would not let that stop you right now, you could install one of these relays at a later date if your in a hurry to get this going tonight/this weekend.

some great advice here guys, thanks so much

someone has just advised me that i should use a relay with a protection diode in it. seeing as my bike has an ecu and there is some sort of 'emf back spark' that can be created by the relay going on and off and possibly bugger my ecu.

[glegge]

also - here is a GREAT web page on relays, it covers diodes across them near the bottom. fill ya boots!

http://www.bcae1.com/relays.htm

[rapid van cleef]

great, its all wired up and working. powers on and off with my ignition! thats the first electrical circuit i have made since batteries
and light bulbs at school 25 years ago!

thanks for the helpful comments guys

[glegge]

great stuff. well done that man.

enjoy the power!

cheers
Gavin

[thepom]

Pot....kettle..............

"OR ... you cold look at the wiring diagram in the workshop manual ... and KNOW what SHOULD go where ... AND WHERE IT IS ..."


Spot the deliberate mistake.......