Page 1 of 1

VDO voltage guage instalment

Posted: Mon Feb 20, 2012 9:44 pm
by Gaz GT2
Has anyone put one of these in a mk2?

I've had it kicking about for years and want to fit it to my gt11
Looking for advice on the best earthing point and where is the best place to get an accurate true reading. I'm not sure what it came out of, but it is a genuine vw/audi part

Any pointers would be great
Thanks in advance

Re: VDO voltage guage instalment

Posted: Tue Feb 21, 2012 4:57 am
by Mr Funk
I've got an installation guide knocking about somewhere. Will pm it over when I get home this evening

Re: VDO voltage guage instalment

Posted: Tue Feb 21, 2012 12:26 pm
by Gaz GT2
Fantastic

Thanks mr funk you're a true gent.

That'll save me from making a mistake and sending my pride and joy up in smoke.

Re: VDO voltage guage instalment

Posted: Tue Feb 21, 2012 3:15 pm
by ianaudia4
Scirocco GTX's came with a volt meter as standard, there should be a wiring diagram in the Haynes manual.

Re: VDO voltage guage instalment

Posted: Tue Feb 21, 2012 5:55 pm
by Gaz GT2
Just been looking through the haynes manual, it has diagrams for everything from cruise control to electric seats nothing seperate for a voltage gauge,

Would it be within the main diagram?

Re: VDO voltage guage instalment

Posted: Tue Feb 21, 2012 6:16 pm
by mr.brown
It was only on GTX models for a couple of years (86-88?) so you'd need to look at those diagrams. Basically, from what I remember, there is single black wire to the back of the fuse box and then the earth (which you can run to the earth multi-connector ring near the fusebox).

For the light, just tap into the one of the grey/blue wires - ash tray light or heater control panel light.

Just checked my Bentley manual and it shows the black wire goes to "A25" and is powered from Fuse 18. It doesn't explain what A25 is but I think the multi plugs at the back of the fusebox are lettered. It also shows the same connector having a black/yellow wire for the Idle Boost Valve.

Re: VDO voltage guage instalment

Posted: Tue Feb 21, 2012 8:10 pm
by Gaz GT2
I shall study the haynes manual and try to make sense of it, and Mr Funks guide, which i'm sure it'll make things a lot clearet and get cracking on with it in the morning.

I'm sure it can't be that difficult it only has the 2 wires to it.

Re: VDO voltage guage instalment

Posted: Tue Feb 21, 2012 10:18 pm
by DT1
Alternatively, any switched positive will do.

Re: VDO voltage guage instalment

Posted: Tue Feb 21, 2012 11:31 pm
by Tim_R
You can run a switched live from a one of the blades on the back of the fuse box. If you have a multimeter you should be able to find these fairly easily, some are constant 12v and some are triggered by the ignition. There are earth points next to the fuse box with a bunch of brown wires connected to them.

Re: VDO voltage guage instalment

Posted: Wed Feb 22, 2012 7:09 pm
by Gaz GT2
Now installed and working perfectly

Thanks for all the advice folks