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Issue with dash cluster

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Having problems with my mk1 golf Gti cabrio cluster

Hello I'm new to this group and I am looking for some help please, this is my first mk1 golf so need someone to point me in the right direction, basically I bought this 1980 mk1 golf cabrio a few weeks ago and I am just ironing out a few little problems with her, since I bought the car the dash cluster has problems, the temp gauge works when it feels like it, the Rev counter is stuck at 7k rpm when ignition on and even when it's running, and also the oil light flashes with ignition on, the oil light sometimes flashes and makes a buzzing noise when driven, but the car has the right amount of oil in. These are them main issues I'm experiencing with the car. Help appreciated thanks. 

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Sounds like the earth to the cluster is broken.

There should be an earth strap going to the corner of the rocker cover, if this is missing or broken then a lot of these issues will occur.

Briano1234  has a fix for this which I can never find! I'm sure he'll pop along and tell us where it is again

Ian

Cornish Host.
1980 VW Derby
Clive the Cabby
Ujum the Invisible
Mynx the  Tintop

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Here is the link to Briano1234 very helpful topics…

https://vwgolfmk1.org.uk/forum/index.php?page=topicview&id=how-to_2%2Fmy-diy-list-of-things

Check the earths 1st.

The buzzer is a sensor for low/high oil pressure and only works when the engine is over 2000 rpm not for the amount of oil in the engine so either it's a faulty sensor, instruments or you have low oil pressure/faulty or blocked oil pump.
What oil are you using?

1988 Mk1 Golf GTi Cabriolet 1.8cc DX, K-jet. Daily drive. 290,000 miles and counting
1978 Mk1 Scirocco GLS 1.6cc FR, Webber carb. Weekend toy.

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Why read all that when you could of posted:

Repairing your Flaky Water Temp Gauge

What do Divorces, Great Coffee, and Car Electrics all have in common?

They all start with GOOD Grounds.

Where are my DIY Links?

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Thank you for the help I'm going to check the earths and see if any are not connected or missing, and I'm not sure what oil is in her as I have not long bought the car and an oil change is on my to do list, owning a old Volkswagen is new to me as this is my first mk1 an I have owned 12 hondas before this so just getting used to it at the minute I'm confident at fixing cars just wanted some input before I start working on the clocks thank you. 

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For an oil change buy a good quality filter, genuine VW or Mann are the best ones to get.

Oil filter (Euro will have discounts at some point, the last discount finished Monday)

|Car PartsRetailer | Euro Car Parts

Oil I've been using for a good few years. usally about £12 with discount at the right time.

TRIPLE QX Semi Synthetic Engine Oil - 10W-40 - 5ltr | Euro Car Parts

Don't forget to fit a new sump plug washer.

SUMP PLUG WASHER SINGLE (14,00 x 20,00 x 1,50)|Car PartsRetailer | Euro Car Parts


Genuine VW filter
Genuine 056115561G Oil Filter | AVS Car Parts

Oil VW would use.
Quantum Synta 10w40 (5-Litre) | AVS Car Parts


12 months or 10,000 miles for oil change.  :thumbs: 

1988 Mk1 Golf GTi Cabriolet 1.8cc DX, K-jet. Daily drive. 290,000 miles and counting
1978 Mk1 Scirocco GLS 1.6cc FR, Webber carb. Weekend toy.

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Thank you I will be doing the oil change tomorrow this forum is so helpful really nice people on here unlike the Honda forums I've been on in the past . I've just checked the earths in the engine bay they are fine so I think the issue lies behind the cluster itself.

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mk1gticabs said

I've just checked the earths in the engine bay they are fine so I think the issue lies behind the cluster itself.

Checking by look isn't a good thing, either a voltage drop test, is better, but to be honest, if the ends have been replaced, replace the cables.  If the cables are still OEM that is unshielded then replace them.  OEM cables still on the car are over 35 years old and probably not up to shape as corrosion can build up between the strands of the cable reducing the overall capacity to carry current correctly.  

Just saying as I have made a career of spurious ground faults or earthing issues on a wide variety of electrical things.



What do Divorces, Great Coffee, and Car Electrics all have in common?

They all start with GOOD Grounds.

Where are my DIY Links?

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mk1gticabs said

Thank you I will be doing the oil change tomorrow this forum is so helpful really nice people on here unlike the Honda forums I've been on in the past . I've just checked the earths in the engine bay they are fine so I think the issue lies behind the cluster itself.
Yes we do try to help when we can..
 :offtopic:I do like a Honda, had a couple of Civic in the past, loved the 1992 1.6 B16a twin cam VTEC with 160ish bhp , and I deleted the CAT and bigger exhaust, bit of a wolf in sheeps clothing but you had to rev it to get the most out of it 5000rpm and off it went…. it was a 4 door Civic saloon which never went wrong,  you don't see many of those about about now…

Last Honda was a more sedate family car being a 2002 1.4 SE a small child arrived in my life so needed a cheap to run car which it was and again the Civic only ever needed servicing, we did about 80,000 miles in it!

Anyway back on to the Mk1 Golf.  :lol:

1988 Mk1 Golf GTi Cabriolet 1.8cc DX, K-jet. Daily drive. 290,000 miles and counting
1978 Mk1 Scirocco GLS 1.6cc FR, Webber carb. Weekend toy.

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Ok I will have a proper test done tomorrow and I'm going to pull the clocks out and have a proper look and see what's up with them I've got an electrician in my family so I'll get him to give me a hand if I can't do it myself thank you for the help hopefully I can get to the bottom of what's causing the faults 

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There's a good guide on here about removing the instrument cluster, I found I don't need to remove the steering wheel. Be carful with the blue plastic circuit board as it get old and fragile.

1988 Mk1 Golf GTi Cabriolet 1.8cc DX, K-jet. Daily drive. 290,000 miles and counting
1978 Mk1 Scirocco GLS 1.6cc FR, Webber carb. Weekend toy.

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Found it.

https://vwgolfmk1.org.uk/index.php?page=cedi&type=misc&id=1%2F42%2F147

There is a few different designs of instrument clusters, they look similar from the front but differ behind.

1988 Mk1 Golf GTi Cabriolet 1.8cc DX, K-jet. Daily drive. 290,000 miles and counting
1978 Mk1 Scirocco GLS 1.6cc FR, Webber carb. Weekend toy.

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Thank you I will follow this guide when I remove the cluster, people are very helpful on here I like this forum 

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I removed the clocks today to find the issue with the Rev counter, and it seems someone has put a wire on to the connector from the plug that goes into the back of the clocks to the alternator for some reason. I will upload pictures to show what I'm on about, I think this is the reason why they are not working properly.

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Rev counter should get its signal from the coil....

1988 Mk1 Golf GTi Cabriolet 1.8cc DX, K-jet. Daily drive. 290,000 miles and counting
1978 Mk1 Scirocco GLS 1.6cc FR, Webber carb. Weekend toy.

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Photobucket isn't working for me at the minute but I have found out the extra wire is for the battery light on the dash, think I'm just going to buy a new set of clocks

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Photobucket does not work for posting on forums anymore unless you pay for it monthly.

Add images tab below if you have them on your computer or use the free tapatalk app on your phone and you can upload them from that app.

1988 Mk1 Golf GTi Cabriolet 1.8cc DX, K-jet. Daily drive. 290,000 miles and counting
1978 Mk1 Scirocco GLS 1.6cc FR, Webber carb. Weekend toy.

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add them directly from puter to here or open a IMGUR account.

What do Divorces, Great Coffee, and Car Electrics all have in common?

They all start with GOOD Grounds.

Where are my DIY Links?
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