I really need some help. I am 100% self taught on everything I know. I have a Motorola Systems 9000 unit installed. I previously had this in a 2004 Pontiac Montana and a 2005 Buick Rendezvous without any problems. However, about a week ago, I started have problems in the 2005 Buick Rendezvous. I assumed it had to do with my wiring at the battery.
I now installed it into a 2010 Dodge Grand Caravan. I have it wired as follows:
8 Gauge wire from the Motorola harness directly to to the battery positive terminal. The ground from the harness is grounded to the frame near the main controller.
From the controller head, I have the main module running to the controller. Off of the main module cable, there is 2 electric wires. these are bound together and patched into a fuse block. This fuse block then runs to a relay switch under my hood.
The relay is functional and has been tested (as well as replaced), If I bypass the relay, the system functions without any problems. The only issue with this is that it's powered on all the time and doesn't shut off with the keys.
I have replaced the relay, the cable harness, the module cable, the controller, the controller head, The fuses (for good measure, but never blown), the wiring, the connectors and everything else.
For some reason, when the relay is added into the system, the radio no longer powers on with the car. However, I can confirm the relay is closing when the car starts (I have tested and hear the click).
Can someone with a little more knowledge explain maybe what its going on here? I am lost at this point.
I just can't seem to explain why the relay is functioning normally and the radio functions normally without the relay, but when the relay is in place the controller head doesn't power on.
This is my radio here: Motorola Astro Spectra Radio Trunk Mount T04KLH9PW3AN-UCM T99DX+088W_ASTRO W3 | eBay
This is the control head: Motorola Astro Spectra Control Head Face Plate Systems 9000 | eBay