Does anybody know how to wire a basic flasher relay from scratch?
Basic flasher relay wiring
Jan 12, 2008
7 Replies
Go to this page of my web site:
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Click on: " 3-terminal 12V flasher, simplified wiring diagram."
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Speedy Jim
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diagram."
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Thanks
diagram."
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>
The relay shown is a VW part.
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is the 12V power. #31 is a Ground. #49a goes to the signal switch.
You can buy a generic flasher at an auto parts store. These are thermal-operated and have 3 terminals marked: X Power in. L Load (signal switch) P Pilot (for dash indicator)
Some only have 2 terminals, omitting the "P".
There is a helpful article here:
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are discussing the thermal flasher.Internals here:
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Jim
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Basic flasher is pretty straight-forward, assuming it has its own lamps. If you're trying to emulate (or repair) the flasher module used on the early bug/bus (ie, the 'black box'), in which the flashers shared a filament with the brakes, it's a bit more difficult (a couple diodes are required). Best solution is to use Jim's schematic... and to ADD a lamp to the tail-light fixture if you are dealing with an early single-lamp design. (Be sure to match the flasher to the NUMBER of bulbs you want to flash.)
-Bob Hoover
PS -- I've got the circuit board layout & schematic for the DIY replacement for the 'black box' but its on 5" floppys... and I no longer have a working machine that can read them... assuming they're still good :-)
I still have a 5 1/4" floppy drive for emergencies. :-)
Alas, no more 8" drives. Here's a YouTube vid of an old 8" drive in operation:
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Jim
Local Fry's still carries 8" floppies. Only $199 per 10.
I had an IBM computer with a 5" drive just a couple of years ago, before moving down here :) It was fully functional but the hard drive boot sector was corrupted. (It had a massive 10MB hard drive). I was not able to find a 5" boot disk to fix the boot sector and get the thing running. So I gutted the damn thing and meant to build a modern pentium inside it. Some frame cutting would have been required. It had a matching old skool CGA monitor too, which I was going to convert as well. Sadly I had to abandon the project. I wanted to retain teh 5" drive too just for kicks.
Jan
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