Info on wiring diagrams for tuscans

Info on wiring diagrams for tuscans

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Discussion

kds keltec

Original Poster:

1,365 posts

189 months

Wednesday 30th June 2010
quotequote all
Hi Guys ,

I am in need of some help with regards to wiring diagrams for the engine loom and car body loom , where is the best place to down load such items or buy them .

I ask this due to i have been rebuilding an already very clean straight tuscan owned by PH member on here until last autumn when i was lucky enough to buy the car (very quickly mind you as i was aware its had alot of money spent on it in the past)and i have slowly been attending to all the TVR troubles from the factory .

car is seen here



pics from last owner














I will be posting on here once completed with all the pics of all the work done , and try and help others as much as i can too .

The car runs perfect which it should as its got a very late engine (2006) which has only covered 1100 miles and Racing Green fitted it along with other work from jason at straight six .

last owner spent 22k .

The problem i have is the air con works correctly IF i run a 12v supply from the positive of alternator to the compressor clutch , fans cut in and out etc .

i can not get a 12+ to the wire labeled on the engine loom air con clutch , i removed the heater/aircon switch on the center tunnel and have found that 2 of the wires have been removed from the multiplug on the switch and dont know why .

So thought i would trace all the wiring is correct , and while i am there i think from when it last was used OCT 2009 the hazards only flash on one side .


Down loaded from my tuscan here for others

http://www.mytuscan.co.uk/downloads.php

and here from Grahams site

http://www.varleyhyd.com/FJ062.asp

but the loom is slightly different as i have 2 round multiplugs for engine loom and none have the main car body loom diagrams .

Any help would be great as its nearly ready for me to use and these are the last things to attend too

thumbup


kelly

nelly1

5,630 posts

230 months

Wednesday 30th June 2010
quotequote all
Have you checked the fuse (#28 - 20amp) that feeds the A/C clutch?

kds keltec

Original Poster:

1,365 posts

189 months

Wednesday 30th June 2010
quotequote all
nelly1 said:
Have you checked the fuse (#28 - 20amp) that feeds the A/C clutch?
Thanks yes i have and guess should post what i have done .

The fuse 28 supplies the heater to which is all working correctly hot / cold fast / slow on and off .

I have removed and regased the system too just incase the pressure was low due to low gas and not making the pressure switch (which i assume it has one) like all other cars .

So i can regulate the temp while the compressor has a 12volt supply from alternator , the fans kick in and out correctly and the temp inside the cabin is lovely and cold .

I need to workout why 2 wires and been removed and taped up from the control switch and then slowly run through the wiring circuit for the air con system .

The car is a 2000 model but i have notice that the ecu has wrote on it 2006 and must of been fitted at same time as engine and the cats have been cut on the outlet side and rewelded to line up with exhaust system .

So i am guessing that in the past its had a couple of changes made to some of the systems in line with new or recon parts fitted .

before the new engine it did have a rebuild on the original engine which was not done correctly and did not last and the company who did the work went bust , then RG fitted the new one .

I spoke to RG before buying the car and they confirmed that all the major work done thats needed , engine / clutch flywheel / nitrons / bushes / full repaint / perfect chassis / new seats / brakes and upgraded stereo and alarm .

They did say it needs to finishing touches to make it a extremely good car , which is what i have been doing in between the customers car work load .

I have finished servicing / polishing and paint under the bonnet changed all belts and alined them so they run true , fluids , plugs , ht leads , coil pack , filters, installed heat reflective matting near the exhaust manifolds and lastly throttles all set up correctly and she purrs ,

now i have a ACT carbon intake to fit but of course cant until i trace why the air con clutch is not energising as the loom connections are behind the air box on the bulkhead banghead






Kelly

nelly1

5,630 posts

230 months

Wednesday 30th June 2010
quotequote all
The first thing I would try is to bell out the two mystery wires and see if one goes to the A/C clutch wire on the engine loom.

It's possible that in the past, the A/C may have developed a fault and the wires were disconnected so the heater could be used without it.

If one of them does go to the clutch, it's simply a case of finding which pin on the switch goes to +12v when the button is pushed for the A/C, and re-connecting the wire.

dvs_dave

8,581 posts

224 months

Thursday 1st July 2010
quotequote all
Also you need to check the AC trinary switch (pressure switch) which has a tendency to pack up if not used for a while. It's located by the receiver/drier in the front wing.
Also check that the evaporator thermostat is set to fully cold. This is stuffed up above the passenger footwell.

Not sure about your chopped wires, but it doesn't sound right especially if the body loom multi-plug has connectors/wires for them?

FYI, the 12V supply for the compressor originates from the heater control unit, (again stuffed up in the passenger footwell). It's also not unheard of for the compressor feed to become disconnected by accident after work has been done on the engine so trace it back as far as you can to check.

kds keltec

Original Poster:

1,365 posts

189 months

Thursday 1st July 2010
quotequote all
dvs_dave said:
Also you need to check the AC trinary switch (pressure switch) which has a tendency to pack up if not used for a while. It's located by the receiver/drier in the front wing.
Also check that the evaporator thermostat is set to fully cold. This is stuffed up above the passenger footwell.

Not sure about your chopped wires, but it doesn't sound right especially if the body loom multi-plug has connectors/wires for them?

FYI, the 12V supply for the compressor originates from the heater control unit, (again stuffed up in the passenger footwell). It's also not unheard of for the compressor feed to become disconnected by accident after work has been done on the engine so trace it back as far as you can to check.
Thanks mate wink

spent around 3 hours going through all the posts from last couple of years on here to do with A/C and heater , so with some very usefull info found what you have wrote above thumbup

ordered a new trinary switch and reciever dryer from tvr power this morning .

Then while playing with heater controlls this morning i dont have hot anymore only cold and when i adjust the temp control i hear a faint buzzing but not flap movement , so ordered a new stepper motor too .

The evaporator thermostat is not fully cold so will set that lower and heater control unit is covered with spray glue and black so much that i would not be surprised if its got too hot at some point .

So the plan is to source another heater control unit , replace pressure switch ,change stepper motor and reciever dryer then set stat lower .


this is what has stumped me thou

picutres of the heater controls/switch

front



back showing 4 wires only on a 6 pin connector



the 2 wires taped up



and the wire untaped clearly showing they have once been in a connector



green is 12v + and black is earth .


so this is why i need a wiring diagram or someone to look to see either where the wires go or if they are also taped up on their car biggrin

does that make sense


kelly

Edited by kds keltec on Thursday 1st July 11:15

SX

22 posts

219 months

Tuesday 5th October 2010
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HI KELLY,MY HIGH LEVEL REAR N/S INDICATORS NOT WORKING-ANY POINTERS PLEASE?

wongthecorrupter

2,382 posts

170 months

Tuesday 23rd October 2012
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That looks smart in white

TUS 2 CON

467 posts

277 months

Wednesday 24th October 2012
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With apologies to the OP for the slight thread hijack, does anyone know where the earth points are in a Tuscan (2)?

Toady1

1,611 posts

223 months

Monday 8th April 2013
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Did ayone ever find any wiring diagrams for the tuscan?

I'd have thought the earth points would be the same as the mk1 wouldn't they? I know there is one on the rear of the chassis above the diff! Spotted it last weekend when replacing my diff bushes!

nawarne

3,088 posts

259 months

Monday 8th April 2013
quotequote all
Toady1 said:
Did ayone ever find any wiring diagrams for the tuscan?

I'd have thought the earth points would be the same as the mk1 wouldn't they? I know there is one on the rear of the chassis above the diff! Spotted it last weekend when replacing my diff bushes!
OK, earth points for Mk.1 are:

1) Right at front of chassis on vertical tube between main upper & lower fore and aft tubes of backbone, faces inwards toward dry sump oil tank (13mm nut). Should have (un-insulated)aerial ground as well.
2) Drivers side engine mount - top bolt 17mm.
3) Battery compartment
4) New to me...above diff (guess for rear lighting)

I'd also love a wiring diagram, if anyone has such a thing. Always good for a starting point!!
Nick

justyr

337 posts

211 months

Wednesday 10th April 2013
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I've tried to find wiring diagrams in the past but never got anywhere. It seems that this is one of the very rare documents which hasn't found it's way into pdf format and on to the web. Pretty amazing really.
I don't know why anyone would want to prevent its disclosure.

dgreaves

8 posts

281 months

Wednesday 30th September 2015
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Found this old thread and thought this would be a useful update: http://hamel-eng.co.uk/TVR/Tuscan-wiring.pdf
Be warned; it's 80+ pages of complex loom information rather than a nice multicoloured diagram

MPETT

965 posts

205 months

Sunday 29th May 2016
quotequote all
dgreaves said:
Found this old thread and thought this would be a useful update: http://hamel-eng.co.uk/TVR/Tuscan-wiring.pdf
Be warned; it's 80+ pages of complex loom information rather than a nice multicoloured diagram
The link doesn't work anymore. Any chance you could repost it?

Cheers
Martin

rhyspw

312 posts

191 months

Sunday 29th May 2016
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Got a nasty letter from Tvr about hosting these so had to take them down. If anyone needs the wiring diagrams email me on here.

m4tti

5,426 posts

154 months

Monday 30th May 2016
quotequote all
Really. Can you post it up.

Why would they do that on legacy cars.

On that alone all depositer enthusiast should shun them

Even Porsche release their technical data.


Pathetic

Edited by m4tti on Monday 30th May 02:09

aerospoke

364 posts

229 months

Monday 30th May 2016
quotequote all
Hi there

I too would be most gratefull if you could email me the electical diagramms.
jensbaier@hotmail.com

Cheers Jens

Sagi Badger

588 posts

192 months

Monday 30th May 2016
quotequote all
Not the first case of this.

I had the chance to talk with Mr E last year but decided not to, just wasn't in the mood to argue as I knew I would, being as I figured I wouldn't like the response as I wanted to ask why things like this were going on although I support the same.

Anyway the value, at sale, of a brand item comes from desire as well as common sense, on the part of the purchaser. To explain, the mind set of a sports car buyer and what he might think.... Porsche.... I want one as it is fairly desirable and it is reliable and safe and holds its money.... Vs TVR I really 'effing want one 'cos it is loud porn.... known to be not so reliable (even if the new ones are there is history so people will ask and that will nag away at me) it may be safe but perhaps not as safe as a Porsche (if so due to budget to design and crash test) and they seem to hold their money (due to the efforts of current owners and specialists). So we are nearly there in my simple comparison.

Another way of looking at is if you let anyone work on your Rolex it could 'eff it up. The headline is my Rolex has started going backwards, or something, hence you restrict the access to maintain or tinker, well you can try. Now the design issues that plagued TVR have been addressed by specialists and are documented, so the issue of reliability actually, I think, stems from design and production cost cutting not poor maintenance in most cases, so I wanted argue against what I uphold.... confused try writing it!

To explain I run the construction arm of a super prime development company and have a similar business decision, that is to let others work on what we build once sold or look after it with the people who I trust... and it is a big one as the sales are driven by what people say based on sold product performing as it should, these are very complicated buildings, and the public know best and always look at bottom line so do we subsidise the first five years of maintenance or let the man in a van role up and mess it up? The current value in brand from older stock is a benefit and in TVR this has come from where, well you know the answer.

Also, Rhys is a good bloke.

J

jregholdsworth

2 posts

94 months

Monday 30th May 2016
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I would be most grateful to recieve the Tuscan diagrams too.. I have a 2002 Mk1 4.0, with a dodgy speedo..I'm sure its the binnacle..not the sensor, so diagrams would be a great help.

Thank You

MPETT

965 posts

205 months

Monday 30th May 2016
quotequote all
rhyspw said:
Got a nasty letter from Tvr about hosting these so had to take them down. If anyone needs the wiring diagrams email me on here.
Could you email me the pdf please? You have PM. Many thanks. Martin


Edited by MPETT on Monday 30th May 23:52