Originally Posted by dae32
I'm looking to install a FAST 7901 into my Mazda and am wondering if the FAST 9999 will plug into the 7901 connector or is the 9999 a standalone connector that is spliced into existing OEM wiring?
Welcome to the Bazooka Forum dae! You do not need the FAST-9999, as that is a universal harness. You will need the FAST-7901 Harness and the FAST-BTAH Harness for completing your install. They both can be purchased in the Bazooka online store, the FAST-7901 is $9.99 and the FAST-BTAH is $15.99. You will need the FAST-BTAH harness as this is what actually runs to the back of the vehicle. It is 5 meters in length (16.4 feet). If you have any other questions, please post again.