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Murmsk Samba Member
Joined: February 24, 2019 Posts: 368 Location: Illinois
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Posted: Tue Mar 16, 2021 7:21 pm Post subject: High/low beam relay |
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I have some questions about the wiring of the high/low beam relay specifically the signal to switch. When the lever is pulled does it ground or is it activated with 12v.
Steve _________________ 1970 Convertible
1972 super
1946 Willys Jeep |
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AlmostHeavenWV_VW Samba Member
Joined: October 12, 2017 Posts: 1965 Location: WV
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Posted: Tue Mar 16, 2021 7:32 pm Post subject: Re: High/low beam relay |
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"Trigger" from the dimmer stalk to the dimmer relay appears to be a ground wire
View the wire trace here in the 1970 wiring diagram
https://www.thesamba.com/vw/archives/info/wiring/1970_VW_Type_1_Poster.jpg _________________ 1973 Standard Beetle
1600DP AK case
Solex 34PICT3 Carb
Bosch DVDA 205AJ Distributor |
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Cusser Samba Member
Joined: October 02, 2006 Posts: 31271 Location: Hot Arizona
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ashman40 Samba Member
Joined: February 16, 2007 Posts: 15975 Location: North Florida, USA
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Posted: Wed Mar 17, 2021 8:23 am Post subject: Re: High/low beam relay |
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Concur with the the others... the dimmer switch grounds the "S" terminal of the dimmer relay when pulled.
Note that there are two types of headlight dimmer relays: 4-prong and 5-prong.
AFAIK, all US Spec Beetles came with the 4-prong dimmer relay. Euro spec cars had the 5-prong.
When shopping for a new one the 5-prong seems to be more common as an aftermarket replacement part. The 5-prong can be used as a replacement (prongs are in the same place as 4-prong), but you need to make sure the extra #30 terminal is powered. Either constantly powered (add a red wire to a fuse with constant 12v) or powered whenever the headlight switch is ON (powered from the same #56 wire that normally powers the relay). If the #30 terminal is not powered the dimmer relay often will not operate at all. _________________ AshMan40
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'67 Beetle #1 {project car that never made it to the road }
'75 Beetle 1200LS (RHD Japan model) {junked due to frame rot}
'67 Beetle #2 {2019 project car - Wish me luck!} |
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