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Dimmer switch works but can not flash headlights lights
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milfredo
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PostPosted: Mon Apr 25, 2022 2:50 pm    Post subject: Dimmer switch works but can not flash headlights lights Reply with quote

71 Bay, I have all all electrics working, apart from the headlight flashers. There is no bodging, all bad wires and connectors replaced with correct wires.

I found a disconnected live wire in my indicator stalk and soldered it back in place without removing the stalk. This fixed the dimmer switch so I can engage the relay and switch between headlights and main beam with the ignition and headlights on. I am unable to make it flash though and from the wiring diagram, it all looks to be the same wiring.

What am I missing, is there something funky to check in the indicator stalk/ switch?

Cheers,
Will
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skills@eurocarsplus
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PostPosted: Mon Apr 25, 2022 3:04 pm    Post subject: Re: Dimmer switch works but can not flash headlights lights Reply with quote

what do you mean "flash"?

if you mean toggle the headlights from high to low 1) they need to be on and 2) the relay has to do a full cycle to change over from high to low

in the early buses you could never "flash" the high beams with the headlights off if thats what you mean
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busdaddy
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PostPosted: Mon Apr 25, 2022 3:11 pm    Post subject: Re: Dimmer switch works but can not flash headlights lights Reply with quote

skills@eurocarsplus wrote:
in the early buses you could never "flash" the high beams with the headlights off if thats what you mean

In Europe you could, not on North American models.

Milfredo, have a look at your relay for a #30 terminal, NA buses don't have them, but all the new relays sold lately do. That has to have a red wire in the fuse box supplied by constant battery power if you want to flash with the lights turned off.
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KTPhil Premium Member
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PostPosted: Mon Apr 25, 2022 3:17 pm    Post subject: Re: Dimmer switch works but can not flash headlights lights Reply with quote

busdaddy wrote:
skills@eurocarsplus wrote:
in the early buses you could never "flash" the high beams with the headlights off if thats what you mean

In Europe you could, not on North American models.

Milfredo, have a look at your relay for a #30 terminal, NA buses don't have them, but all the new relays sold lately do. That has to have a red wire in the fuse box supplied by constant battery power if you want to flash with the lights turned off.


Yes. Some are jumpered to 30 from another (56?) terminal... clip it, and run a dedicated 30 wire of adequate gauge to run both L+R through it.

https://www.thesamba.com/vw/forum/viewtopic.php?t=341307
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milfredo
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PostPosted: Mon Apr 25, 2022 3:49 pm    Post subject: Re: Dimmer switch works but can not flash headlights lights Reply with quote

This is a California bus so probably has never had them. There are only 5 connections on the relay (from memory); lights, lights, power from headlight switch and switched earth from indicator stalk.
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milfredo
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PostPosted: Mon Apr 25, 2022 3:51 pm    Post subject: Re: Dimmer switch works but can not flash headlights lights Reply with quote

KTPhil wrote:
busdaddy wrote:
skills@eurocarsplus wrote:
in the early buses you could never "flash" the high beams with the headlights off if thats what you mean

In Europe you could, not on North American models.

Milfredo, have a look at your relay for a #30 terminal, NA buses don't have them, but all the new relays sold lately do. That has to have a red wire in the fuse box supplied by constant battery power if you want to flash with the lights turned off.


Yes. Some are jumpered to 30 from another (56?) terminal... clip it, and run a dedicated 30 wire of adequate gauge to run both L+R through it.

https://www.thesamba.com/vw/forum/viewtopic.php?t=341307


I’ll try this tomorrow as I’d like to be able to flag as it’s invaluable in the uk in an old motor.
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milfredo
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PostPosted: Mon Apr 25, 2022 3:57 pm    Post subject: Re: Dimmer switch works but can not flash headlights lights Reply with quote

Thanks everyone
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busdaddy
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PostPosted: Mon Apr 25, 2022 5:13 pm    Post subject: Re: Dimmer switch works but can not flash headlights lights Reply with quote

KTPhil wrote:
busdaddy wrote:
skills@eurocarsplus wrote:
in the early buses you could never "flash" the high beams with the headlights off if thats what you mean

In Europe you could, not on North American models.

Milfredo, have a look at your relay for a #30 terminal, NA buses don't have them, but all the new relays sold lately do. That has to have a red wire in the fuse box supplied by constant battery power if you want to flash with the lights turned off.


Yes. Some are jumpered to 30 from another (56?) terminal... clip it, and run a dedicated 30 wire of adequate gauge to run both L+R through it.

https://www.thesamba.com/vw/forum/viewtopic.php?t=341307

That'll make it work when the lights are turned on, but for real passing lights you need a dedicated full time power source for #30 instead of the jumper to #56.
The OP will likely need a relay with a #30 terminal as well, sounds like his is the older NA only version.
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SGKent Premium Member
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PostPosted: Mon Apr 25, 2022 5:23 pm    Post subject: Re: Dimmer switch works but can not flash headlights lights Reply with quote

there are two relays available for late bays. If you buy the one that flashes, and put in a jumper on it, the stalk will flash the headlights on a late bay. I have that in my 77. But you must have the correct relay or you will blow fuses, or worse. I think the Champagne Edition buses had that feature. If you search you can find the part number and jumper placement. It works to flash with the lights turned off.
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milfredo
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PostPosted: Tue Apr 26, 2022 12:19 am    Post subject: Re: Dimmer switch works but can not flash headlights lights Reply with quote

SGKent wrote:
there are two relays available for late bays. If you buy the one that flashes, and put in a jumper on it, the stalk will flash the headlights on a late bay. I have that in my 77. But you must have the correct relay or you will blow fuses, or worse. I think the Champagne Edition buses had that feature. If you search you can find the part number and jumper placement. It works to flash with the lights turned off.


Great info, thanks.
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