Petrol Tachometer wrong connector

Post by **garry247** » 14 Mar 2020, 18:21

Hi fellow campers. I have acquired a petrol tachometer but the wiring connectors do not fit.

I have what I believe is the early type.

Here is the tacho

My connector looks like this I found on the site.

How do I fit it?

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Post by **AngeloEvs** » 15 Mar 2020, 01:31

What year is your van and what engine?

Post by **garry247** » 15 Mar 2020, 12:53

1983 1.8 petrol

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Post by **garry247** » 15 Mar 2020, 13:04

I just opened the dash up again. Here are some pics.

The dashboard

The back

Inside

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Post by **Mocki** » 15 Mar 2020, 13:04

I made up a convertor when I did this years ago

Early

Late

Post by **garry247** » 15 Mar 2020, 14:09

I only have the tacho (see pic 1)

The mesh will not fit on the new clock, also it has a very small connection on it.

Really confused what to do.

Thx

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Post by **garry247** » 15 Mar 2020, 14:31

Thanks Mocki BTW

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Post by **AngeloEvs** » 15 Mar 2020, 14:44

Your van will need a wire from the ignition coil as only the later post 1986 vans with the later oi pressure warning system have it at the edge connector.

In addition to the coil connection you will also need a +12v from the ignition and an earth connection. Both of those are at your connector but you will have to find a suitable way to tap into the wires.

The only way to have the tacho working with your current dash is to wire the tacho using connectors with wire linked to the wires from the coil, 12v and earth using some form of connector block. There is a very long thread ’Replacing the dashboard pcb'. In the electrical and wiring section regards a hardwire PCB kit developed by a member, in that thread you will see details about connecting the later oil pressure pcb (which uses the same pins as on a tacho) using small connectors instead of the vw PCB connector. Its a long thread so just skip through it till you get to the tacho posts, it is around pages 13- 15.

Post by **Mocki** » 15 Mar 2020, 17:41

garry247 wrote:I only have the tacho (see pic 1)

The mesh will not fit on the new clock, also it has a very small connection on it.

Really confused what to do.

Thx

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Sorry I misunderstood that you had the whole clock set .....

Post by **garry247** » 16 Mar 2020, 14:16

Thanks, AngeloEvs,

I went through the thread:
https://club8090.co.uk/forum/forum/viewt ... &start=240" onclick="window.open(this.href);return false;

Was sort of following, I think its saying that if i buy the kit provided by CHJ, then i could change over to the petrol Tacho as well as change the bulbs to led.

Is that the case. It looks like I would just swap over the green ribbon on the back with his PCB and wires. Is that the case.

sorry, its a little confusing for me. I sort of get it.

Thanks again for your time and patience,

G

Post by **AngeloEvs** » 16 Mar 2020, 17:14

I am not sure of the kits are still available. You could send a PM or may be someone knows for sure. I will take a look and see if I can track down those small connectors to slip over the tacho pins. You have the 12v, 0v already and just need a cable from the coil to provide the pulses.

Post by **garry247** » 17 Mar 2020, 12:09

Thx,

i tried to PM but it send it back to me?

ill try again.

Cheers,

G

Post by **AngeloEvs** » 17 Mar 2020, 20:45

Can't copy and paste the link but go to EBAY, search for 'Dupont single row' and look for eBay seller komodo electronics or search for 'ribbon cable ' and seller Umtmedia as they sell the connectors with cable attached.

You need to order a few of the single connectors. You will also n

Post by **slowcoach** » 18 Mar 2020, 09:04

AngeloEvs wrote:Can't copy and paste the link but go to EBAY, search for 'Dupont single row' and look for eBay seller komodo electronics or search for 'ribbon cable ' and seller Umtmedia as they sell the connectors with cable attached.

You need to order a few of the single connectors. You will also n

I'm also working my petrol tach, and looking for the 3 Dupont connectors to go into the back of the tach. I'm guessing that the spacing of the pins on the tach are not standard, so would just need 3 seperate single female lines, to push onto the tach pins?

Like these:
https://www.ebay.co.uk/itm/264307833766" onclick="window.open(this.href);return false;

I've made chj's board, it's the tach part that's a bit fuzzy in the instructions!

Post by **AngeloEvs** » 18 Mar 2020, 10:20

The Tacho pins will be the same as the oil pressure DOPs and the CJ kit uses the single female connector so I would use the same for the tacho as shown in your EBAY link.

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