'89 Corrado 16v - ABF KJET - Fun weekend car

It is one of these, many sources on ebay.

https://www.ebay.es/itm/184325859906

 

Finally got time to do the headlights relay harness and I must tell, it is worth the effort.

As recommended by rubjonny I follow this diagram, 1 relay per headlight only for dipped:




I bought some oem style connectors, so I don't need to cut the standard loom:




Before I measured at the bulb and it was getting only 10.1 volts




So this is the loom I made all ready to use. As you see only 12v battery and earth must be connected, and clip it between the standard loom and the headlights.





Now I am getting 13.5 Volts at the bulb, well worth it!!



It is really bright now, the phone camera could not focus because of that:

 

For anyone else about to do their own headlight wiring loom for a Corrado, there is a UK Company I found when I was making mine, called Auto-Click (Auto-Click UK - Automotive Connectors (auto-click.co.uk), they stock the male and female OEM type connectors (with pins) as shown in the pic below the wiring diagram, VW 4 pin Flat Contact housing part nr: 357941165, Auto-Click's replica version- female 357 941 165 / 357941165 Auto-Click part number: 4-AC237 @ £2.74 ea, Male Part nr 357941165 Auto-Click part number: 4-AC283 @ £2.63 ea.
As these are replica's they are perhaps not quite as accurate as OEM, a bit tight for the headlamp connector plug, but go on ok with a bit of a push, they also do other OEM type connectors. worth a look, I have used them a couple of times, quick delivery.
I would suggest 3 x relays, 1 for each low beam side, and one for both high beams, with Fuses in line from the battery + supply.

 

Good find there. Its also worth checking the TE connectivity site (They own AMP, the company that make most VW connectors). It's a bit overwhelming to look through everything but their live chat support is really helpful and you can get pretty much every pin and most connectors shipped free next day.