10 hours ago, fladavid said:

Thanks Kenny.

😐 it's Lenny 

7 hours ago, fladavid said:

This is quite bizzare but I did what Stoney said and undid the gunky tape around the connections, it was like glue and sticking to my fingers. I started by cleaning all the wires with just a dry cloth, plugged in the new head unit and bingo all was working. I jiggled the wires a fair bit to make sure that there quad no lose connections, all seems good at the moment. 

Can't understand  why gunky ekectrical tape would affect the connections but at the moment that seems the case.

Most likely the tape has got hot and the glue has run causing the wires to become coated and insulated.

Proper crimps or soldering plus some heat shrink on individual wires is the proper way to do it.

I didn't realise electrical tape could actually end up being bad for wiring! 

Thanks to all you guys that helped and to you Stoney for leading me to the right conclusion. Well hopefully at the moment anyway. 

33 minutes ago, fladavid said:

I didn't realise electrical tape could actually end up being bad for wiring! 

Thanks to all you guys that helped and to you Stoney for leading me to the right conclusion. Well hopefully at the moment anyway. 

If you ever decide to install an amplifier then you would need to have the speaker cables cut in that fashion, 

So crimp spade connection may be the best solution. 

I've fitted a removable amplifier panel which also has a feed from the headunit 50W speaker outputs,

so if the rear seat needs folding down the panel with amplifier can be unplugged and speakers connected to the headunit audio supply to keep audio while rear seat is folded.

Looks like you may have been right in the end Lenny.

Went to car this morning and the speakers were dead again. It has to be to do with heat in the car, cool car in morning speakers dont work, hot car later and they work again.  Anyway I cleaned up and rewired the dodgy wiring the previous owner had done like Stoney advised, still nothing. I then accidentally pressed on one of the speakers wires  just where it enters the connector block hard and the right side came on again but the left side wouldn't even pulling at the wires. 

I'm now assuming that the block itself is faulty and needs either replacing or I wire it in like you said wire by wire with connector, thus taking the quad lock totally out of the equation. I will never sell the car so it won't affect another owner later on so I feel that might be my best bet dont you think? 

Having never dont it before any tips on doing the job or any pitfalls I should be aware of? 

Thanks. 

Decided to try some electrical contact spray first tonight.

I sprayed the connector block and connected the head unit. This time I got both left speakers on but no right hand ones. I then decided to try the balance and fade settings, this is when things got strange. 

Balance centred left speakers on right ones dead. 

Balance to left full speaker power to both left speakers as expected. 

Balance to right no speakers at all as expected.

Fade centred left speakers on right speakers dead. 

Fade to rear just rear left speaker as expected.

Fade to front both left and right speaker working, didn't expect right to become live.