Audi a4 no power to HU , please help

[justarookie]

i have a 2006 audi a4 and im normally pretty good with wiring radios but im afraid on this one i've made a dear mistake. while testing out my rearview cam my power and ground came into contact. since then ive checked and replaced the radio fuse and any fuse i thought could be related and 2 relays underneath the dash. but i still have no power to the HU any suggestions?

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[All_Logix 10+ year member]

Does your a4 use any type of computer aided system, you could have shorted out the control module. Anything else in the car stop working, like the chimes or blinker clicks?

 

[justarookie]

no everything else is fine. i just have no power to the radio. one person i asked said the wire may be shorted. is it possible to wire it directly from the fuse box?

 

[ropuma]

Check fuse under hood, globe compartment and trunk

 

[Worlddre 5,000+ posts]

Do you not have constant or Ignition? I doubt you did damage to any major vehicle components however I believe the factory radio uses CAN for ignition. You have two options. First you could run a new fused ignition to the ignition harness or second you could pick up a CAN turn on module from metra, AI or someone else. If you dont have constant than you likely replaced the wrong fuse.