Relays and wiring woes

[ORB 227 1 Cars]

Morning people, my memory has faded a lot since I swapped my engine for a GTI6 and I’m struggling with starter feed. 
 

can anyone help with what these relay boxes are for? 
 

I can get it to crank if I send a signal to the starter from the battery but not from the key so I’m just chasing stuff down
 

 

[welshpug 1,657]

None of those are engine related, the gti6 double relay is on the back of the ecu box.

[ORB 227 1 Cars]

Thanks mate. I’ll have a ratch. 

[welshpug 1,657]

Typically there isnt a relay for the starter unless someone has added one in, the gti6 looms dont tend to give issues on the starter circuit like the 205's did.

[ORB 227 1 Cars]

Yeah, thought as much. I’m getting 12v at the brown plugs when I turn the key, but nothing at the starter. I can start it by spiking live to the solenoid. I assume it’s crappy wiring somewhere in the loom?

[ORB 227 1 Cars]

Another question. 

 

Will a 1.9 GTi Alternator and Starter fit a GTI-6 Engine? 

 

Thanks again 

Edited March 13 by ORB

[welshpug 1,657]

no on both counts, unless the gti6 has had the early S16 non ac bracket fitted.

[ORB 227 1 Cars]

Thanks @welshpug - always a font of top notch info! 
 

now, do you happen to know the part number for my alternator? I’m trying to replace it on the cheap (because I’m a tight fisted northern sod)

[Richie-Van-GTi 71 2 Cars]

Are you sure on the starter Mei? I swapped my 4rs racecar starter onto my 8v gti when it failed without issue. Or is it the large body 8v gti starter wont go under the larger plenum?