sounds like a poor connection somewhere behind the radio. maybe someone has removed it before and not plugged in back in correctly or securely enough

It is the fan control resistor pack....the resistors between the lower speeds have failed and therefore no resistance to the motor on speed 4 so runs flat out

Replace the resistor pack and that will sort it

Hi InsigMart ...welcome to the Club

That's what forums are for, hope you find the answers you're looking for

Sounds like your winning the battle

Certainly looks superb now

It should be possible to slide out the old big end bearings and fit new ones and would probably replace the bolts if possible and not too expensive

 

It appears that it should just slide out but may need some gentle easing to remove

You can always post it in the For Sale section of this forum and photos would definitely help 

Would start with checking battery voltage and heavy discharge test with headlights on to see how the battery holds up, charge or replace as necessary

 

is the handbrake slack as in does the lever have lots of freeplay in it before it takes up on the cable?

sometimes if the cable is too slack the lever 'bounces' enough to put the light on

adjust the cable and this will cure it

you could try eBay for replacements. I have seen some on there before so would imagine they are still available

https://www.ebay.co.uk/b/Vehicle-Parts-Accessories/131090/bn_1838652?mkcid=1&mkrid=710-53481-19255-0&siteid=3&campid=5338906902&customid=&toolid=20012&mkevt=1

More than likely water ingress with the weather we've been having

Is the interior steamed up and lots of condensation?

You can try this eBay link and think you'll find most of the parts you need

https://www.ebay.co.uk/b/Vehicle-Parts-Accessories/131090/bn_1838652?mkcid=1&mkrid=710-53481-19255-0&siteid=3&campid=5338906902&customid=&toolid=20012&mkevt=1

eBay is sometimes best place to value the car by setting a high reserve price and seeing how the high the bids get to, you can always withdraw it from sale if the bids aren't high enough

I'm sure a garage could find the issue as it could show as excess play in a component due to wear and tear possibly?

Thats a fantastic looking GTC you have there, great paint colour as well

Good to have you onboard!

I guess ebay is probably the best place to source most parts for the Vectra

https://www.ebay.co.uk/sch/i.html?_from=R40&_trksid=p2334524.m570.l1313&_nkw=vectra+door+seals&_sacat=131090&LH_TitleDesc=0&_odkw=vectra+exterior+trim+parts&_osacat=131090

More than likely the turbo variable vanes have gummed up with carbon, especially if the car hasn't had a good blast for ages this tends to happen

What temperature is displayed on the instrument panel?

generally, the thermo-syphon effect within the cooling system means that the top will be hot and bottom will be cold and the coolant circulates (with the assistance of a water pump) within the engine and ancillary items such as the heater.
Therefore the bottom hose should be a lot cooler than the top one.
If you measure with an infrared temperature gun, the temperature should fluctuate (without any sharp dips or peaks) throughout the engine.
 

Its a turbo coolant pipe

There are a few listed on ebay

https://www.ebay.co.uk/sch/i.html?_from=R40&_trksid=p2499334.m570.l1313&_nkw=meriva+turbo+coolant+pipe&_sacat=131090

Here is an eBay link to some Meriva steel rims

https://www.ebay.co.uk/sch/i.html?_from=R40&_trksid=p2499334.m570.l1313&_nkw=meriva+steel+rim&_sacat=131090

Not sure of the exact part number you require but I can recommend FAI as a first class gasket manufacturer as have used them extensively as a preferred company in the past.

Elastomer is the compound that is pretty much a silicon bead used to seal the various components on the head and block. 

Apart from resting your foot against the clutch pedal then possibly it is sensing some slippage through the clutch (in fact loss of wheel traction) which may be interpreted as clutch slip?

It could still be the battery supply which could dip and then the battery recovers by the time you have measured the voltage (e.g. warmer air temperature) so I would run a deep discharge test (measure the volts with the engine off and the lights on - should be around 10.8v to 11.5v minimum).

Otherwise, could be water ingress in the electrics so if there are any leaks internally I would start there

Hi Mr Boyo ..... welcome to the Club

 

Very nice but such a shame to see it resting in the field

I had one years ago but it definitely did not look like that one

Thanks for posting the photo