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Re: Wastegate LED tester
Ned Ritchie wrote:
> __________________________________
>
> An improved tester can be made using two LEDs [Light Emitting Diodes]
> and two resistors. In this case it would be similar to the new &
> improved US 1115 Audi tester which in not polarity sensitive. Use 680
> ohm resistors. Nominally this should give about 20 milliamps for safe
> operation. Radio Shack and some Automotive Stores have 12 volt LED
> testers with the resistors already built in. [It is not wise to use a
> bulb type tester]
I've built a couple of testers for myself and Mike Z. using a 3mm
bi-colour (GRN/RED) led. I built it into a pointed hollow tester probe
from a multimetre and attached a coiled GND lead w/alligator from an
antistatic mat.
Now I can not only test for HOT, but for GND as well. Very handy.
--
Igor Kessel
'89 200TQ -- 18psi (TAP)
'98 A4TQ -- in the port of Boston
Philadelphia, PA
USA