Rev Counter Wiring Help

Website · Post by **CovKid** » 03 Feb 2016, 10:26

Blade or bullet fuses on yours? 85 and it could be either.

If its bullet I'd still wire from fusebox as its quick to do.

Post by **crazymilk** » 03 Feb 2016, 10:35

Yep they are bullets

Pretty easy to get to and I can just use the double ended spades?

Post by **crazymilk** » 03 Feb 2016, 14:04

CovKid wrote:Top

Definitely?

Post by **CJH** » 03 Feb 2016, 14:18

crazymilk wrote:
CovKid wrote:Top
Definitely?

If you want to be sure, take the fuse out, then use your multimeter to see which side is live with the ignition on. The side which is still live when the fuse is removed is the unfused side, so if you take your feed from there you should put an inline fuse in the wire that goes to the tacho. The side which is not live when the fuse is removed is the fused side, so you can take your feed to the tacho from here without having to put an inline fuse in - it would be protected by the fuse in the fusebox. But take care, if the current draw of the tacho is significant you may be overloading that fuse. I have no idea how much current a tacho draws.

Post by **ghost123uk** » 03 Feb 2016, 15:11

CJH wrote:I have no idea how much current a tacho draws.

Not much at all.

Post by **irishkeet** » 11 Feb 2016, 21:31

how did this go in the end CM?

Website · Post by **CovKid** » 11 Feb 2016, 22:54

Ofcourse I'm sure. Bottom rail in fusebox is power from battery, takeoffs at top.

Post by **crazymilk** » 12 Feb 2016, 10:12

irishkeet wrote:how did this go in the end CM?

Great - thanks guys

Perfect keet, I will try to get some pixs up soon.

Post by **keynsham1** » 13 Feb 2016, 08:31

For my van from the 14 pin connector, the green wire is the rev counter feed, the black one next to it is the 12v ignition feed and the red/grey one at the end of the block is the dash light feed. The other wires from the rev counter are earths if it is like mine so just connect to the body at a convenient location.

Website · Post by **CovKid** » 13 Feb 2016, 11:45

It is yes, but on most vehicles without a rev counter (particularly early ones) VW didn't fit a complete loom in which case all you can do is run a new cable underneath. Thats what I had to do.

Post by **silverbullet** » 13 Feb 2016, 12:35

On the later fuseboard there are plenty of spare permanent & ignition switched live terminals.
A tacho doesnt need fuse protection, its a tiny current impulse from the 12v side of the coil.

No need for splicing in (butchering) at the ignition switch.
LPG fitters are you listening/learning?

Website · Post by **CovKid** » 13 Feb 2016, 15:36

or recycled telephone wire

Post by **Mocki** » 13 Feb 2016, 17:10

silverbullet wrote:On the later fuseboard there are plenty of spare permanent & ignition switched live terminals.
A tacho doesnt need fuse protection, its a tiny current impulse from the 12v side of the coil.

No need for splicing in (butchering) at the ignition switch.
LPG fitters are you listening/learning?

Don't be tarring everyone with the same bodgey brush now.....

Post by **silverbullet** » 13 Feb 2016, 18:22

Wouldn't dream of it.

Post by **Mocki** » 14 Feb 2016, 09:16

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