[182] The modifications made by Mr Emery to the air conditioning on BIV U481 caused costs to be incurred by the City that would not otherwise have been incurred. This was caused by the voiding of the warranty in relation to that component of the vehicle. As Mr Melis from Mazda explained in his email of 28 February 2017 to Mr Carter, and which I find no reason to doubt, the problem with the air conditioning was not a manufacturer defect therefore its repair was exempt from the warranty.
[183] The evidence before me does not support a conclusion that the warranty on BIV U481 was voided beyond the air conditioning component. I accept that the estimated cost of repairing BIV U481 was $1,902. Whether that was the final invoiced amount I do not know. Regardless of the invoiced amount however, the assessment from Mazda was that the modification of the air conditioning had caused the compressor clutch to burn out causing the compressor to stop working and hence shutting down the air conditioning.
[184] Mr Melis' brief email to Mr Carter is supported by the evidence of Mr Green that the modifications of the type carried out by Mr Emery could have caused damage to the compressor. In this case I am satisfied that it did. No other explanation for the damage to BIV U481 has been given.
[185] The evidence does not support a conclusion that the modifications made to the air conditioning in BIV U483 resulted in any voiding of the warranty on that vehicle. Mr Carter removed the wiring inserted by Mr Emery and refitted the relay. A subsequent fault in that vehicle was apparently repaired with no warranty issue raised.
[186] I am satisfied that, in carrying out the modifications to the BIVs, Mr Emery used the incorrect wiring diagrams and that those he used were from a 2006 Manual. Mr Emery claimed that car manufacturers update car manuals regularly but there was nothing in his evidence to suggest that the wiring diagram he relied on had been updated since 2006 when the manual from which it came was copyrighted.
[187] I am satisfied on the evidence before me that the wiring diagrams relevant to the BIVs are those produced in the evidence of Mr Green. It would appear from the 2016 diagram that the wiring had changed since the 2006 wiring diagram relied on by Mr Emery. Mr Emery "googeld" a query and took the information provided by that means as correct. While I accept that he looked under the bonnet to ensure all the components were there, the evidence does not support a finding that this was sufficient. There is an inherent danger in accepting what google produces as being the most current advice on a matter.
[188] Evidence was given by Mr Emery, Mr Eaves and Mr Green, all auto electricians, on the basis that their opinions were reliable as they were "experts" in the field of auto electrics.
[189] I have not accepted the opinions (or expert evidence) of Mr Emery as being evidence on which much weight should be placed. Mr Emery has not worked consistently in the field of auto electrics since 2001. Whilst I accept that his qualifications remain valid and whilst it may be that he does such work from time to time, it is not the field in which he practices or works or concentrates. Further, Mr Emery was giving evidence in his own defence which might be seen to colour the evidence given. Mr Emery was argumentative in his opinions and demonstrated a stubbornness in his evidence which does not support acceptance of his opinions as reliable evidence. Mr Emery was not prepared to accept any alternative to his view even in the face of evidence clearly to the contrary. This was demonstrated in his unwillingness to accept that he had not filed the wiring diagram on which he relied and which formed his "research" following his discussion with Mr Snook with his first witness statement despite a concession by his lawyer of this.
[190] I accept that both Mr Eaves and Mr Green have the qualifications and experience to provide their opinions to the Commission as to the damage that may have been done to the vehicles by the modifications of Mr Emery.
[191] I do not accept that Mr Eaves' evidence is tainted because he had previously worked for Mr Emery's sister. His evidence was that they parted acrimoniously. In addition I am not aware of the content of the conversation between Mr Eaves and Mr Emery to evaluate how that may have impacted on Mr Eaves' evidence. However, Mr Eaves' evidence is limited in that he based it on the 2006 wiring diagram relied on by Mr Emery. Mr Eaves did not look at the evidence of Mr Green as to the 2016 wiring diagram.
[192] Mr Eaves generally agreed with the assessment made by Mr Green of the impact of the modifications made by Mr Emery and, to the extent he disagreed, it was more in emphasis than fact.
[193] I accept that Mr Green is an auto electrical contractor for the City. I do not accept that this would have an adverse consequence on any opinion he may put to the Commission.
[194] There is no doubt that Mr Green carried out the more thorough investigation and had access to more information in relation to the wiring as inserted by Mr Emery and in relation to accessing the appropriate wiring diagram for the vehicles in question.
[195] I do note that Mr Emery conceded that, if the wiring was as considered by Mr Green, the pressure switch would not respond to changes in pressure which would have the effect of not turning the compressor off if this was required.
[196] I am satisfied, on the basis of the opinions expressed by both Mr Eaves and Mr Green, that the modifications made by Mr Emery could have caused damage to the vehicles.
[197] I accept, on the basis of the opinion of Mr Green and Mr Eaves and the evidence of Mr Carter, that the modification made to BIV U481 by Mr Emery did cause damage to that vehicle. That the extent of the damage was quoted to cost only $1,902 to repair and that no reported damage was done to BIV U483 is not the relevant consideration. The actions of Mr Emery could and did cause damage to at least one of the vehicles.