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Correct way to wire 2 relays?


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Posted

i still dont see the need for 2 relays. can someone explain why 2 relays are needed? the head unit will flip one relay on and you can run everything off of that relay.

One is for the parking brake bypass on a head unit. The other is for a remote to my bass amp. The reason that I have it on a relay is because my door amp is hooked up to the radio's remote and I don't want to shut off the 2 channel and the bass amp every time I press the button.

What the f**k is an appropriate signature supposed to look like?

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Posted

i still dont see the need for 2 relays. can someone explain why 2 relays are needed? the head unit will flip one relay on and you can run everything off of that relay.

One is for the parking brake bypass on a head unit. The other is for a remote to my bass amp. The reason that I have it on a relay is because my door amp is hooked up to the radio's remote and I don't want to shut off the 2 channel and the bass amp every time I press the button.

wy cant you hook the video parking brake bypass and amps all to one relay. i must not be understanding how the cirucuit works. but im just curious for my future knowledge.

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Posted

One relay switches ground the other 12v I used my head unit to turn on 4 amps a eq an dome fans before I doubt 2 relay coils will hurt it

TEAM DC AUDIO

VEHICLE:98 chevy tahoe 2wd 3-4 drop

HEADUNIT:alpine 9886

PREAMP:arcaudio

FRONT STAGE:4-6 1/2s selinium,DD component set and 4-selinium tweeters in each door

KICKPANELS:jl audio 5 1/4

REAR DOORS: dd components 6 1/2s

HIGHS AMPS:zapco 750.2 on front doors,zapco an another 750.2 on kicks and rear doors

SUBS:4-ascendant audio 18s with 5 spiders in a custom box built by KINGSUV

SUB AMP: 2-dc7.5s

ALTERNATORS: 3-mechmans 1- 425comp, 1-smd spec350, 1-270 with adj voltage harness on custom dc bracket

WIRE:10-runs 0g front to back

BATTERIES:6-d1400s

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Posted

i still dont see the need for 2 relays. can someone explain why 2 relays are needed? the head unit will flip one relay on and you can run everything off of that relay.

One is for the parking brake bypass on a head unit. The other is for a remote to my bass amp. The reason that I have it on a relay is because my door amp is hooked up to the radio's remote and I don't want to shut off the 2 channel and the bass amp every time I press the button.

wy cant you hook the video parking brake bypass and amps all to one relay. i must not be understanding how the cirucuit works. but im just curious for my future knowledge.

One relay is going to complete a ground circuit for the parking brake wire. This is a bypass method so you can watch videos while driving. The green wire that you see in his pic is triggered by the ground. The second relay is for your normal stuff. That one is being fed a 12v constant to provide power to the remote turn ons.

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Posted

Ok I see. Thanks for info guys. Didn't know how the bypass worked. Nice.

Buyer/Seller Feedback Thread: http://www.stevemead...5015-bump4life/
MB C220 153 Trunk Car Build Log: http://www.stevemead...d/#entry1840136
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My SPL Log: http://www.stevemead...__fromsearch__1

BMW M340 xDrive

Stock, for now. Corner Load 10" maybe soon. But does 10s in the 1/4...
Best Scores out of a trunk
153.0 sealed legal full tilt clamped 5524 @ 42 hz
154+ windows down, 155+ kick

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