Part Needed for 1984 TVR Tasmin 280i Wedge

[Tasmintvr]

1984 TVR Tasmin 280i. WEDGE
See attached photo of badly needed air conditioning part.
I was told it is an air conditioner controller.
It’s located inside car under dash next to fuse box on passenger side of
LHD car. It was suggested to me that this part controls fans on condenser but I’m not sure.

I hoping that someone recognizes the part and can assist me.
I have additional photos if you need.
Thank You

[adam quantrill]

Can't it be repaired? Most of these items are quite simple circuit boards inside with easily obtainable components. Start by replacing anything obviously burnt out, all the electrolytic capacitors (with higher spec ones), test everything else and replace what's knackered.

[Tasmintvr]

Thank you for giving me some suggestions in order to locate the part.

[Tasmintvr]

I will be sure to look into any repair shops here in the USA that might work on the circuit board. Unfortunately, it’s getting much harder to locate repair shops still willing to work with old British cars. If you have a shop there in UK that you like I would gladly take the information.
Cheers,

[Tasmintvr]

Adrian, many thx for your quick response.
It’s getting much harder to locate parts for older British cars,
Even some of the repair shops have closed.
Cheers,

[adam quantrill]

You don't really need an automotive electrician for this, a competent electronic engineer should be able to sort it out, given the vintage of the part you'd preferably be looking for someone aged 40+ who is used to the style of construction.

[adam quantrill]

Great Adrian - complete with internal pictures and even a circuit diagram!

This was the link that you had posted:
https://www.alfabb.com/threads/need-air-conditioni...

Restoring this in case people want to "stay original" and fix their own unit, after all a resistor change is cheaper and quicker than a whole new one.

The resistors look like 1/2W or 1/4W in case you have any burnt out and need a replacement. But if you go higher, that will probably solve the problem permanently.

Edited by adam quantrill on Monday 4th January 20:55

[Penelope Stopit]

Tasmintvr said:

It was suggested to me that this part controls fans on condenser

Yes it does

There are plenty of very cheap universal electronic control units for sale that will give the required AC control
https://www.aliexpress.com/i/32791660890.html


https://www.ebay.co.uk/itm/Universal-Car-Air-Condi...


https://www.amazon.com/Universal-Conditioner-Elect...

[Adrian@]

Sorry, I have removed my posts as PS has solved your problems without the need for the links. A@

[KelvinatorNZ]

Adrian@ said:

Sorry, I have removed my posts as PS has solved your problems without the need for the links. A@

Would've been good to leave your original posts there for others to see tbh, maybe it would've helped someone else with their issue instead of jumping to an aftermarket part.

[Adrian@]

Kelvin, the thread WAS complete and Adam has now included the link to the what should be considered everything the OP needs/needed to spend a few Pounds/Dollars, to repair his unit. (I just happened to know what to look for on the internet, because I know my TVR's). The thread had descended in to something that I no longer wanted to take part in, which then had nothing to do with the OP's question. A@

[phillpot]

Penelope Stopit said:

Yes it does

How many extra relays will it require

[Penelope Stopit]

Tasmintvr said:

It was suggested to me that this part controls fans on condenser but I’m not sure

If your vehicle is using the same circuit

Looking at the below diagram it can be seen that the switch directly controls the fan motor speed, it can also be seen that the temperature is controlled by a temperature control potentiometer that is part of the switch and that the electronic unit measures the present temperature from a thermistor probe

It can also be seen that there is no high current load connected to the control unit, the control unit switches the condenser fan relay in and out to control temperature

Due to the control unit only needing to withstand milliamps of current draw when it switches the condenser fan relay on, there is nothing in the circuit that can burn the control unit out

If there is a problem with burnt components within the control units circuit, there is every chance that the components have been damaged by a faulty relay, incorrect relay or a wiring problem, the only other possibility being incorrect testing

Suggest that you also replace both relays in the circuit

[Adrian@]

BUT, PS, as ever, again, you are being obtuse and ignoring the facts, choosing not to read previous posts, on your own sort of 'mission' (exactly what happen yesterday!!) . You have choosen to illustrate the Alpha Spider diagram when we are working on a TVR (espcially as within the Alpha threads it is found to be drawn incorrectly AND there is an excellent TVR FACTORY USA 2.8 one that can be worked with). A@

Edited by Adrian@ on Tuesday 5th January 12:54

[phillpot]

Adrian@ said:

BUT, PS, as ever, again, you are being obtuse and ignoring the facts

Can't believe that

[Penelope Stopit]

Adrian@ said:

BUT, PS, as ever, again, you are being obtuse and ignoring the facts, choosing not to read previous posts, on your own sort of 'mission' (exactly what happen yesterday!!) . You have choosen to illustrate the Alpha Spider diagram when we are working on a TVR (espcially as within the Alpha threads it is found to be drawn incorrectly AND there is an excellent TVR FACTORY USA 2.8 one that can be worked with). A@

Thank you very much for pointing out that there is a diagram to be found

Stay safe

[Penelope Stopit]

As previously mentioned

"If your vehicle is using the same circuit"

The following diagrams show that the Alfa and TVR circuits use identical electronic module relay switching, the output for this switching is to be found at pin 2



Stay safe

[Adrian@]

PS ..What you are seeing in a wiring diagram (I did say)
The TVR part

and as I said the Alpha part

Which No2 were you talking about.
A@

[Penelope Stopit]

Adrian@ said:

BUT, PS, as ever, again, you are being obtuse and ignoring the facts, choosing not to read previous posts, on your own sort of 'mission' (exactly what happen yesterday!!) . You have choosen to illustrate the Alpha Spider diagram when we are working on a TVR (espcially as within the Alpha threads it is found to be drawn incorrectly AND there is an excellent TVR FACTORY USA 2.8 one that can be worked with). A@

Edited by Adrian@ on Tuesday 5th January 12:54

There seems to be a problem with your judgement, keyboard (Caps Lock button possibly sticking) and spell checker

In answer to your confusion

Should you bother to read my posts you will notice that I have suggested the replacing of a suspect faulty air conditioning controller with a more modern easily found universal controller

Have also suggested that should the OP decide to repair a burnt controller, it will be worthwhile to check the circuit through and replace relays (reasoning and more can be read above)

Am not interested in the Alfa Romeo diagram or control unit being incorrectly numbered, have observed that the TVR and Alfa Romeo diagrams do show that the units are wired and function in the same way, have no interest whatsoever in double checking posts made to the above linked Alfa Romeo website, purchasing a control unit, checking it through, posting my findings regarding the termination of a Alfa Romeo control unit to then pass the information on to your good self here at a TVR forum

Having found a TVR Air Conditioning wiring diagram and seen what a simple A/C controller is being used, there is nothing else needed to assist others in solving A/C controller issues in the future

If your good self hadn't pointed out that there was a TVR Wedge A/C diagram to be found, I and others would have been none the wiser
Can't thank you enough for that

Have a happy and prosperous new year

Stay safe

[KKson]

Happy New year to you all.

Keep on Wedging. x