Head Unit suddenly lost power? 172 Cup

[STCaulkin]

Quick question, I have a Kenwood head unit that has literally stopped working overnight?!

I haven't changed anything (except put a smaller aerial on the car but sure this isn't the cause) but the head unit will no longer power up or play anything. I can provide more details of the unit and pictures in required but wondering if anyone knows why this may happen?

maybe a loose wire at the back of the unit?

​Thanks in advance

 

[skinz]

i presume you have checked fuses?

 

[STCaulkin]

i presume you have checked fuses?

Being a complete novice, where would one find the fuse ?

 

[Feates172]

On the back of the stereo

 

[Badgerman85]

Or the main fuse....open the passenger door, the fusebox is on the side of the dash on the passenger side, pull the cover off and use the diagram on the back of the cover to work out which fuse it is

 

[Jack!]

Is your display showing the time and temperature? If it's the fuse you normally lose those as well.

 

[STCaulkin]

Ok so I checked the fuses both the head unit and main one are both are fine. The temp and time are showing as well. I took out the unit and got some pictures of the back of it. I don't know what I am looking for tbh me and my friend just connected things together when we put it in.

Is this supposed to be connected to something?!

The model:

occasionally the radio will come on and crackle and the unit will sound through the speakers when browsing through the menu with the controls. However the screen will still remain off. This leads me to think it is a fault with the head unit?

​Cheers again

 

[Badgerman85]

Sounds like tis either gonna be a faulty head unit or a faulty wiring harness

 

[Thrill]

Just try a different headunit to rule that out - no point wasting time.

 

[skinz]

the plug you are questioning is for a cd changer and wont affect powering of unit, there are 3 fuses to check for the radio (1 on radio, 1 ignition supply fue, and 1 constant supply fuse) - multimeter should show 12v on yellow (constant) and 12v on red (ignition, when key is turned)

 

[Feates172]

In your first post you said it will no longer power up. So has this headunit been working then stopped. Or never worked?

 

[STCaulkin]

Just try a different headunit to rule that out - no point wasting time.

i don't have a spare one unfortunately unless I dig out the original

In your first post you said it will no longer power up. So has this headunit been working then stopped. Or never worked?

Yeah had been working perfectly, got back from a few days blasting round Devon, 4 hour journey home worked all the way then the next day it has stopped since then.

 

[Feates172]

Id say faulty headunit/harness. Take it back.

 

[icebergclio]

the plug youre refering to is the stalk control plug... the cd changer plug is the emply large black socket in the headunit casing. i would recheck all fuses and check that the plugs on the radio loom for the red/yellow wires are pushed in firmly as these can come apart. i would be dubious as to headunit failure as kenwood are bombproof however you can rule it out as said with another radio. remember there are two power sources for a radio... the actual radio fuse and the ignition control for it so pull and check All fuses

 

[STCaulkin]

Thanks for the replies.

Just if anyone is interested it was a problem with the head unit itself I think as I swapped it out with a different one and it worked fine. Kenwood let me down!!