Fuel gauge
-
Skipalmer40
- Posts: 3
- Joined: Fri Apr 21, 2017 5:13 pm
Fuel gauge
When I bought my 1974 Beetle none of the wires for the sending unit, vibrator or fuel gauge where hooked up. Where do what wires go?
-
Jim Ed
- Posts: 766
- Joined: Tue Aug 31, 2010 5:14 am
-
Marc
- Moderator
- Posts: 23741
- Joined: Thu May 23, 2002 12:01 am
Re: Fuel gauge
Something to keep in mind, the "vibrator" regulates the voltage by shunting some to ground when it rises above a certain level (the output resembles a square wave, but the gauge doesn't respond fast enough to wiggle in response so the needle remains steady).
If you apply voltage without a good ground path for the regulator, its output will rise to full system voltage - it only takes a few seconds of that to burn out the gauge. Always make sure that the regulator is mounted solidly to the speedo housing before applying power to it.
If you apply voltage without a good ground path for the regulator, its output will rise to full system voltage - it only takes a few seconds of that to burn out the gauge. Always make sure that the regulator is mounted solidly to the speedo housing before applying power to it.