did i blow my head unit?
 

Hi first time poster here. I'm wondering if I have blown my stereo?

i just bought a sirius radio unit and had the idea of hard wiring it into my head unit through the rear rca jacks. i pulled the head unit and there were 3 sets of rca jacks on the back. i tried the purple wires which i dimly recalled were the aux ins. nothing happened. then without thinking i tried the other two jacks as well. each time there was a signal from the sirius. after this i notice the head unit is perfectly functional but makes no sound except a tiny tinny sound at max volume on one rear speaker .

fuse seems good. it seems to be well grounded by a bolt on the cage that attaches to a frame. did i blow the amp by sending a signal in though the rca outs?

head unit is a clarion ARX7470. it's an old but nice unit and i have a 12 disc cd player with it so would not want to lose it.

I don't see too many ways you could have damaged the HU... check and double check all of your your wiring

I believe the purple set of RCA's is for your sub-out... meaning, you don't have an aux-in with that HU via RCA's...

Not sure if trying to input voltage on to those outputs will blow the HU though... I'm sure someone here can tell you about that. :dunno:

not sure if your deck has it but my past two clarions have, there is an amp cancel feature that turns off the amp to your speakers and only allows your rca's to pass anything if your deck has this feature make sure it is turned off it could be possible you turned it on by accident. other then that I have no idea.

the Clarion ARX7470 from memory has a small swich on the top side of the case, that switches one of the line out's to a line in... Look at the deck, and see if there is any swiches on he top, or maybe the bottom... it's been a number of years since I played with that unit...

regards, Mark

thanks for the help folks

found a slot in the bottom labelled as a line in/line out switch but no switch is visible in the slot. I'm giving up on hard wiring it. I just want the head unit to work and I will use the fm tuner.

can't find an amp cancellation switch. Is this hard switch or software? is there a diagnostic mode for these decks as I can't find a menu. the car came with the radio so no manual. no sign of

also, does anyone know what/where the power antenna control switch line would be on this deck? a friend suggested that it might be stuck on from me unplugging then replugging the unit and causing this. my power antenna is controlled by an oem dash switch so the power antenna control is not hooked up afaik.

finally, how many fuses would this unit have. same friend said probably two but I can only see one in line fuse at the rear which is not blown.

this particularly sucks because i connected the sirius before i did this based on the fm tuner so now i'm paying $15/month to have no radio at all!