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Braukuche
Samba Member
Joined: September 03, 2004
Posts: 11005
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 Posted: Fri Jun 24, 2016 10:45 am Post subject: Six wire turn signal switch resistance? |
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My 60 Beetle is still six volt and has really dim rear turn and brake lights. When I measure voltage going to the blinker flasher from the fuse box it is nearly six Volts, going from the flasher to the switch not under load it is nearly six,however with the turn signal on output measured for the rear and front turn signals idrops to four as does the input from the flasher to the turn signal switch.
Does this signify resistance in the switch meaning the contacts are corroded and I need a new switch or am I misdiagnosing this?
_________________
Go Reds! Smash state!
Retirement is here!
1956 Ghia
1959 SO-23 Westfalia
1960 double cab
1960 Baja Bug
1963 stretched double cab
1962 Golde sunroof Ghia
1963 356 B coupe
1963 Notchback
1967 21 window less rusty now |
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flyboy161
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Joined: December 26, 2009
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Location: Perry, GA
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glutamodo 
The Android
Joined: July 13, 2004
Posts: 26325
Location: Douglas, WY
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| Posted: Fri Jun 24, 2016 10:58 am Post subject: Re: Six wire turn signal switch resistance? |
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If the voltage is the same on both sides of the switch under load, then it isn't the switch that's causing the voltage drop.
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Andy T.
IMAGE NOTE: It has been noted that Chrome based browsers may have issues in displaying my vast image library, which use non-secure links and are on an FTP server. Images should still be viewable if the link is clicked though.
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runamoc
Samba Member
Joined: June 19, 2006
Posts: 5601
Location: 37.5N 77.1W
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| Posted: Sat Jun 25, 2016 6:28 am Post subject: Re: Six wire turn signal switch resistance? |
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| glutamodo wrote: |
| If the voltage is the same on both sides of the switch under load, then it isn't the switch that's causing the voltage drop. |
Or measure for voltage across the switch while 'under load', the voltage should be zero. Any voltage measured means there is resistance in the contacts.
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Daily driver: '69 Baja owned 44 yrs - Plan B: '81 Rabbit Diesel LS Deluxe - Plan C: '72 Ghia
Yard Art: 2 Sandrails
Outback: '69 Ghia - '68,'69,'70,'72 Beetle - '84 Scirocco, GTI - Pair of '02 Golfs-
VW Wiring = It's just wires |
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Braukuche
Samba Member
Joined: September 03, 2004
Posts: 11005
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| Posted: Sun Jun 26, 2016 8:22 am Post subject: Re: Six wire turn signal switch resistance? |
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| runamoc wrote: |
| glutamodo wrote: |
| If the voltage is the same on both sides of the switch under load, then it isn't the switch that's causing the voltage drop. |
Or measure for voltage across the switch while 'under load', the voltage should be zero. Any voltage measured means there is resistance in the contacts. |
Which wire do I measure? the one going from the flasher to the switch whil e under load? When I measure that under load I get a reading of about 2 volts...
_________________
Go Reds! Smash state!
Retirement is here!
1956 Ghia
1959 SO-23 Westfalia
1960 double cab
1960 Baja Bug
1963 stretched double cab
1962 Golde sunroof Ghia
1963 356 B coupe
1963 Notchback
1967 21 window less rusty now |
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flyboy161
Samba Member
Joined: December 26, 2009
Posts: 2091
Location: Perry, GA
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| Posted: Sun Jun 26, 2016 8:37 am Post subject: Re: Six wire turn signal switch resistance? |
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When checking for a voltage drop across any component you measure from input to output. There should be no voltage drop across a switch. If there is any drop then there is resistance. If you put the meter lead on the 54 terminal at the flasher and on the output side of the switch, VL for instance and read 2 volts, then there is a 2 volt drop inside the switch or in the wiring itself. See the diagram below.
What will complicate things is the flashing. I would bypass the flasher by connecting 15 and 54 at the flasher to get a good solid reading at the switch....and other places like terminal boards and bulb holders!
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My father's 1970 Beetle-
http://www.thesamba.com/vw/forum/viewtopic.php?t=603879
The 1964...Diamond in the rough
http://www.thesamba.com/vw/forum/viewtopic.php?t=612776
My 1958 Morocco Bug-
http://www.thesamba.com/vw/forum/viewtopic.php?t=611483 |
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Braukuche
Samba Member
Joined: September 03, 2004
Posts: 11005
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| Posted: Sun Jun 26, 2016 8:47 am Post subject: Re: Six wire turn signal switch resistance? |
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| flyboy161 wrote: |
When checking for a voltage drop across any component you measure from input to output. There should be no voltage drop across a switch. If there is any drop then there is resistance. If you put the meter lead on the 54 terminal at the flasher and on the output side of the switch, VL for instance and read 2 volts, then there is a 2 volt drop inside the switch or in the wiring itself. See the diagram below.
What will complicate things is the flashing. I would bypass the flasher by connecting 15 and 54 at the flasher to get a good solid reading at the switch....and other places like terminal boards and bulb holders! |
Clear now, thanks a million!
_________________
Go Reds! Smash state!
Retirement is here!
1956 Ghia
1959 SO-23 Westfalia
1960 double cab
1960 Baja Bug
1963 stretched double cab
1962 Golde sunroof Ghia
1963 356 B coupe
1963 Notchback
1967 21 window less rusty now |
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flyboy161
Samba Member
Joined: December 26, 2009
Posts: 2091
Location: Perry, GA
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Braukuche
Samba Member
Joined: September 03, 2004
Posts: 11005
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| Posted: Sun Jun 26, 2016 9:24 am Post subject: Re: Six wire turn signal switch resistance? |
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Voltage measured the same so I backtracked.I had about 5.3 going to the fuse. On and about 4.7 put for the turn signals, so I cleaned up the terminals nice and shiny and it even everything out.
Not my snowflakes appear to have two candles in them instead of just one 
Thanks again for your help.
_________________
Go Reds! Smash state!
Retirement is here!
1956 Ghia
1959 SO-23 Westfalia
1960 double cab
1960 Baja Bug
1963 stretched double cab
1962 Golde sunroof Ghia
1963 356 B coupe
1963 Notchback
1967 21 window less rusty now |
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Braukuche
Samba Member
Joined: September 03, 2004
Posts: 11005
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| Posted: Sun Jun 26, 2016 9:24 am Post subject: Re: Six wire turn signal switch resistance? |
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| flyboy161 wrote: |
When checking for a voltage drop across any component you measure from input to output. There should be no voltage drop across a switch. If there is any drop then there is resistance. If you put the meter lead on the 54 terminal at the flasher and on the output side of the switch, VL for instance and read 2 volts, then there is a 2 volt drop inside the switch or in the wiring itself. See the diagram below.
What will complicate things is the flashing. I would bypass the flasher by connecting 15 and 54 at the flasher to get a good solid reading at the switch....and other places like terminal boards and bulb holders! |
Clear now, thanks a million!
_________________
Go Reds! Smash state!
Retirement is here!
1956 Ghia
1959 SO-23 Westfalia
1960 double cab
1960 Baja Bug
1963 stretched double cab
1962 Golde sunroof Ghia
1963 356 B coupe
1963 Notchback
1967 21 window less rusty now |
|
| Back to top |
|
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Braukuche
Samba Member
Joined: September 03, 2004
Posts: 11005
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| Posted: Sun Jun 26, 2016 9:24 am Post subject: Re: Six wire turn signal switch resistance? |
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| runamoc wrote: |
| glutamodo wrote: |
| If the voltage is the same on both sides of the switch under load, then it isn't the switch that's causing the voltage drop. |
Or measure for voltage across the switch while 'under load', the voltage should be zero. Any voltage measured means there is resistance in the contacts. |
Which wire do I measure? the one going from the flasher to the switch whil e under load? When I measure that under load I get a reading of about 2 volts...
_________________
Go Reds! Smash state!
Retirement is here!
1956 Ghia
1959 SO-23 Westfalia
1960 double cab
1960 Baja Bug
1963 stretched double cab
1962 Golde sunroof Ghia
1963 356 B coupe
1963 Notchback
1967 21 window less rusty now |
|
| Back to top |
|
|
flyboy161
Samba Member
Joined: December 26, 2009
Posts: 2091
Location: Perry, GA
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