Right im confused now. As they are a factory fitted optional extra im not actually sure weather there will be a crossover or not. i was just assuming. It might be worth researchin the kit they supply and find out weather there was a seperate crossover or not. Once you've found out whats what, ripp it all out and start again, well thats what i would do. It might be a bit of work but at the end of the day u know where you are and it wired correctly. Regards to the looms. You will need to buy two different leads. One that will plug into the toyota wiring which will adapt the toyota plug to 'ISO' and then a Pioneer lead that will go into the back of the radio. If you call 01728 746500 speak to Angie. That number is the company i work for. She will be able to supply the Pioneer and possibly the Toyota one too. I'll have to check. Say you know me, i'm Ben and you should get some discount too