test light is for troubleshooting and diagnosing the 914's L-Jet and D-Jet efi systems
I saw this on ebay any opinions


http://cgi.ebay.com/ebaymotors/Fuel-Inject...%3A1|240%3A1318

It's just a test light. You can probably find a low voltage test light at your local auto supply for less.

Thanks that was what i was thinking.

called a "noid" and simply plugs into the fuel injector connecting plug to indicate the presence of voltage pulses, indicated by a visible light flash, to show power is getting to the fuel injector. you can get a whole set of noids, one which includes one for Bosch EFI systems, for about $16 if you shop around.