Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB - View Single Post - Help Car wont start after headunit install

Brenner41 · 08-16-2022, 12:09 PM

2013 Scion frs
Old Headunit: Kenwood dnx6990HD
New Headunit: Atoto S7 XE
I recently got a new head unit and was installing it in my car, when I discovered that the previous owner had installed a radar detector (beltronics sti-r plus). It wasn't on and was all stashed behind the dash. It was an absolute rats nest with shawty wiring and I've taken it out. It was spliced into the wiring harness (the head unit wiring harness, not the main one). I have then reused the head unit wiring harness for my new head unit and butt connected all the appropriate wires. When I try to start the car I can get the key position to on but if a crank it all goes black and I lose power to everything and could not get power in any of the key positions afterward. I checked all the fuses and non were blown. By taking them in and out I was able to get power back in the key positions up to on. I am not sure what is wrong or where to check further. The head unit works fine and dims and everything with the lights and plays music to all speakers. Looking for some help, please. I looked online and couldn't find much.

08-16-2022, 12:09 PM	#1
Brenner41 Junior Member Join Date: Aug 2022 Drives: 2013 Scion FRS Location: ON, Canada Posts: 7 Thanks: 0 Thanked 3 Times in 1 Post Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Help Car wont start after headunit install 2013 Scion frs Old Headunit: Kenwood dnx6990HD New Headunit: Atoto S7 XE I recently got a new head unit and was installing it in my car, when I discovered that the previous owner had installed a radar detector (beltronics sti-r plus). It wasn't on and was all stashed behind the dash. It was an absolute rats nest with shawty wiring and I've taken it out. It was spliced into the wiring harness (the head unit wiring harness, not the main one). I have then reused the head unit wiring harness for my new head unit and butt connected all the appropriate wires. When I try to start the car I can get the key position to on but if a crank it all goes black and I lose power to everything and could not get power in any of the key positions afterward. I checked all the fuses and non were blown. By taking them in and out I was able to get power back in the key positions up to on. I am not sure what is wrong or where to check further. The head unit works fine and dims and everything with the lights and plays music to all speakers. Looking for some help, please. I looked online and couldn't find much.