34 roadster light switch
- Thread starter elwood
- Start date
mrtexas
Well-known member
Post the other side of the plate
petehoovie
Well-known member
This is diagram is a little clearer but it's for a '35 which I think is basically the same as the '34 as far as the lighting switch is concerned....
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elwood
Well-known member
hey guys, yea so there are 3 groups of 3, and 3 are hot, but nothing is working, its not even sending power to the tail lights,
shouldn't it work when I put the rotary connector on it by its self and turn it to test it ?
I did download a diagram from mac vanpelt but cant read and of it, its so blury .
shouldn't it work when I put the rotary connector on it by its self and turn it to test it ?
I did download a diagram from mac vanpelt but cant read and of it, its so blury .
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JSeery
Member Emeritus
Then you are not getting power to the switch. The brake light just uses the switch as a connection point and is connected to the hot wiring such that it is hot all the time. The problem is in the wire to the switch. The tail lights do require the movable contacts to work.G
On the wiring diagram, the three sets of three contacts are labeled:
BATT this set of three contacts are power in and the brake light wire
TAIL these three contacts are also connected together with a buss bar so the tail lights are on in Park, Low Beam & High Beam
The last grouping are labeled individually and are PARK, HIGH & LOW.
Can you read the diagram Pete posted?
On the wiring diagram, the three sets of three contacts are labeled:
BATT this set of three contacts are power in and the brake light wire
TAIL these three contacts are also connected together with a buss bar so the tail lights are on in Park, Low Beam & High Beam
The last grouping are labeled individually and are PARK, HIGH & LOW.
Can you read the diagram Pete posted?
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deuce lover
Well-known member
Do you have the wire from the loom that connects to the left side of the starter switch (at steering box),connected?
mrtexas
Well-known member
The part with the brass connectors on it shouldn't be loose like that which is the reason it doesn't work. It is clipped on with a spring under it. Looks repro to me and the solution to that problem is get an original. I'll sell you this original that works for $50 plus postage.
[/IMG]https://fordbarn.com/forum/picture.php?albumid=2057&pictureid=41204[/IMG]
[/IMG]https://fordbarn.com/forum/picture.php?albumid=2057&pictureid=41204[/IMG]
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Kurt in NJ
Well-known member
How are you checking for power??, with no load a voltmeter can show voltage through a poor connection, but it will disappear as soon as a load is on the circuit ---try a jumper on the back side, I have also seen rivit connections go bad, have had to solder the rivit to the connecter
TerryOH
Well-known member
I have mentioned this several times the wiring on the light switch as shown in Fords diagrams is incorrect. check out the attached. As noted on the diagram this is the wiring end so just use a jumper between wires. What happened to your center horn contact, it usually is a flat solid contact yours appears as a tube?
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JSeery
Member Emeritus
All of the wiring diagrams are somewhat stylized.
rotorwrench
Well-known member
The horn contact was likely removed. There is a fuse up under the dash panel that feeds the yellow/red wire to the light switch. Check the fuse first. If it's good then the Y/R wire can be checked at the switch connection. If no current there then the wire may be open somewhere. As mentioned before, the Y/R wire is attached to the switch and powers three of the terminals in the 10 terminal switch and those three are grouped together so that power can be distributed in all of the required positions of that switch.
Switch function would be all lights off, park lights only on, low beam head lights on w/running lights, and high beam head lights on w/running lights positions. Negative cable at the battery is the power in a positive ground system and anywhere on the frame is ground.
Switch function would be all lights off, park lights only on, low beam head lights on w/running lights, and high beam head lights on w/running lights positions. Negative cable at the battery is the power in a positive ground system and anywhere on the frame is ground.