Hi, I'm just about to start rewiring the back of my dash cluster, too many links and it really is well overdue. I planned to lift it forward, take some pics then start remaking the connections but one has come off and I;m not 100% sure where it goes. Its part of the fuel gauge, the voltage stabiliser bolted behind the dash cluster and is the bottom spade connection, yellow one in my picture. Where does that go to? Tonnes of pics in google search "vw voltage stabiliser wiring" for a voltage regulator but FA for stabiliser. need to know where or what it should be attached to (the bottom terminal on the box) pls Thanks PG
Its the same component : a stabiliser and a regulator are interchangeable for this use. Why it is called a stabiliser is that some use an oscillating on/off switch from 12 volts, which stabilises the gauge reading by making the average voltage 5 volts, but by pulsing on for 5/12ths of the time. These use bimetallic strips like old car indicator flashers used to to make on/off pulses. A voltage regulator uses a semiconductor component which just holds the voltage at 5 volts permanently, also keeping the average the same. . One end of the regulator/stabiliser goes to ignition switched +12 . The other end goes to the gauge. The body has to be screwed down to an earthed place to work.
I just found out its also called a voltage vibrator but still not clearer on where my lower terminal (yellow) should go to. ?
The two wires on the regulator, One wire is a 12v feed TO the regulator , the other is a feed out, to the fuel gauge. Sent from my SM-N970F using Tapatalk
One lead (the black ignition supply one) goes to regulator, a shorter lead (red) goes from the regulator to one terminal on the fuel gauge. That may be your yellow?. The other terminal on the fuel gauge goes off to the sender in the tank. "Regulator", "stabiliser" mean the same thing in this context. Some were a vibrator type, some used a zener diode (and a light bulb).
Thanks again, sorted. I'd actually made a bit of a cock up with that one, everything was connected properly, the yellow was where I'd tapped into it for a ign feed to the radio. (I know, I know) I just couldn't see it was 2 wires as the original underneath is black. I'm a bit stuck how I'll get a decent ign live supply without altering the original circuit so I thought to use a relay to trigger a fresh live feed to the radio, spur off a existing ign feed to trigger the relay. Would that work, my logic is it won't load the old circuit, it's the only ign live I need in my new circuit Many thanks, Pg
Just take the supplies off the fusebox, if you've only got a modest radio. On a late Bay box, the top of fuse 8 will give you a permanent supply, top of fuse 12 a switched ignition supply.
