Lowlight By-Pass Warning Relay Wiring AKA Flash To Pass

[VeloMikey]

I was asked by a forum member to expand on how to wire up the By-Pass Warning Relay or as I call it "flash to pass".

58 and 59 Ghias have a square stock turn signal switch with an extra brown and white wire which is a momentary ground. Meaning as long as you pull the stock toward you, the switch will create a ground.

Here is the step by step tutorial to get yours working.

First you need a standard Bosch type relay. My local electrical parts place has lots of cool stuff like these handy prewired relay plugs. The relay has four wires going to it. A constant positive hot wire (30) from the battery, a switched positive (86) to turn it on, a positive out (87) to go to the device you want relayed and a ground (85). You need to match the relay to your voltage system, 6V or 12V.

Next you need to find the famous brown and white wire from the turn signal switch. I used the "foreign car connector" from my electrical parts place to connect it to the brown ground wire in my relay harness.

The next connection is the wire out of the relay to switch or make the lights flash. In my case, it is the heavy gauge yellow wire (should have used white). I ran it to the white high beam wire down at the high beam fuse box. This lets you flash the brighter high beams and trips the blue high beam indicator light on your speedo.

The last wire on the relay, black in my harness, goes to key switch power so this all works when the key is switched on.

Here are couple of things to remember:

The relay is always hot and looking for ground to complete the circuit just like
the horn.

The turn signal switch grounds the relay and sends voltage to the high beams.

VW uses red wires for constant hots from the battery, brown wires as grounds and black wires as switched hot wires.

30 is the hot from the battery
85 is the ground
86 is the key switch power
87 is the hot out to the device want relayed.

Here is a link to the end result.

https://www.instagram.com/p/BS7NGf4hh0-/?taken-by=velomikey
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'58 Ghia 2387cc with a Berg / Folts 5 Speed

Ghia Build Thread https://www.thesamba.com/vw/forum/viewtopic.php?t=768748

[Tall Bloke]

Hey moderators - I think this needs to be added to the stickies ?
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All of 30 horses !

[sputnick60]

Added, thanks
Nicholas
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'66 Karmann Ghia Cabriolet...
'65 Porsche 356C Coupe...
2005 Mecedes Benz C180 Kompressor Estate
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