will i need a relay for my headunit turn on Lead?

[UNDERGROUND_BUM 10+ year member]

Just wondering if you think my headunit will be able to turn on 3 amps, arc audio EQ, and a Arc audio crossover ? or if i need to buy a relay..........

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[DBBOOM 10+ year member]

Relay

 

[bigaudiofanatic 10+ year member]

If you mean the turn on lead you will be fine I have seen people run 4 to 6 amps on one wake up line.

 

[cf2004 10+ year member]

i would buy a relay just to be safe.

 

[pentavolvo 10+ year member]

relay deff

 

[UNDERGROUND_BUM 10+ year member]

where do you guys get your relays from ? and how would i wire it? this is going to be my first install using a relay............

 

[Cabin_Pressure 10+ year member]

http://www.parts-express.com/webpage.cfm?FILTER=Relay&FTR=Relay&search_type=main&WebPage_ID=3&x=13&y=3 Theres your relay and wiring diagram link.

 

[UNDERGROUND_BUM 10+ year member]

thanks guys........ i'll be going with a relay.

and i found a wiring diagram for it ; )

But i had one last question how much amps does a relay draw? like what should i fuse the constant + on the relay to ?

 

[Horsemanwill 10+ year member]

depends on where u put the relay if it's in back off a d block i'd put a fuse on it maybe 10 amps then fuse the output too same just to be safe. also wat head unit is it?

 

[UNDERGROUND_BUM 10+ year member]

Pioneer AVH-P4000DVD

relay will be upfront under the center console....... so the relay draws about 10 amps?

 

[Mike465 10+ year member]

You really don't need a relay for what you are doing.

 

[edzy 10+ year member]

I would use a reley. Cheap insurance for your HU turn on curcuit. And they draw very little current. like .5ma. and you dont need a fuse on it. Would you fuse your normal remote wire? No. But on the power side of the relay, a 10 amp fuse should be fine if your using no more then 12awg.

 

[jdawg 5,000+ posts]

if you dont feel like waiting then go to advanced or autozone and look in the foglights section for a relay, but yea i would add one, anything more than 2 things on the remote wire

edit- they are like $20 there, I buy mine on ebay and get 5 or so with pigtail harness for that price, search 'bosch relay', nice to have a few around, many uses