Celica Forums General Discussion Interior wiring headunit

I'm about to start hooking a system in my gts and it seems as if a lot of people are having trouble finding the right harness, amps, and hookup up there shit in general. can anyone just give some clear discription of where the hell shit is at and any other advise before i start??

Let me get your email address and I'll forward you a GOOD head unit install write-up

^^ wanna send it to me also?

and me

i want in on this too.

PM me your emails and I will forward it to you guys.

damn i didnt think anybody was going to reply for a sec there..u da man stun

stun you should post it in the install section for everybody.

Grkmixer, bigants036 & celica_182 you guys got mail.

Im too lazy to post it up Plus, this was initially posted by Adam Hockemeyer (GTSbyTRD) a looong time ago. I just decided to keep it because I knew it would come in handy.

***Not trying to discourage you but please note that the guide is just for reference. If you do decided to use the install guide and perform they installation yourself, I nor Adam are responsible for any damages incurred either directly or indirectly to your Celica.***

I wish I could perform all the installations myself because its fairly easy but since I cant. I suggest you guys do all the research and ask as many questions as you can before you take this task at hand. If you dont feel confident in your wiring skills then DONT DO IT and take it to a professional.

hey i never got that email about the wiring of the celica...i wonder if you mind sending it one last time to grkmixer86@yahoo.com thanks bro i appriciate it.

Make sure you disconnect your battery before you start!!!!!!!!!!!

what is the downside of having the negative NOT disconnected when installing an aftermarket HU?

You got mail

I just installed my HU this past weekend using the factory amp and I didn't disconnect the battery.

Install wasn't that difficult, only thing I had trouble with is soldering resistors into the harness.

no downside so far...

only downside is you could blow a few or short circuit something..even if using the harness..just be safe and remove ur neg. battery..take like 3sec to do it..better safe then sorry..

^yeah you can get seriously zapped if you go playing around in there...lol... TRUST me. I've ganked out that HU several times...and one time i forgot..ZAP

lol. BTW are you guys just wiring in an aftermarket head unit using your factory GTS amplifier? Or are you bypassing the factory amp? I did mine using the factory amp because i don't have serious audio performance plans.

how did you use the amp?

i used an amp interface that you wire your headunit's wiring harness into...and then you wire the stock harness into the other side of the interface...and voila! you have a 4-channel output split up into 8 so that your components run at the same frequency cut-offs that they are meant to have from the factory

where is the factory amp? i looked under the passenger seat cause thats where i thought it was, but i didnt see anything...any ideas?

yea the amp is usually under the glove box if you take out the two white clips in the back you'll b able to c it no problem...but i think its only the 8 speaker setups that will have them.

I'm in the middle on an Install right now actually and if someone who has this guide in their e-mail can PM me, I'll send you my e-mail address and you can forward it over.

I'm installing an Omnifi DMP1 with my Stock Stero and I need to figure out the best way (and where) to wire the power in.

It needs:

Chassis Ground
Ignition Sitched +12V DC
Dimmer
Battery +12V DC


If someone can give me some advice I'd appreicate it.

I wrote a guide a long time ago too. It's posted somewhere around here.

https://celicahobby.com/ubbthrea...#Post1869765317

Here it is.

hey thanks! Some parts are a little hard to follow, just cause it was my first install guide. But it all works.

i was wiring it up and cant seem to get any power to my head unit. the only thing not wired up to so far are the speakers but i wouldnt imagine that it would effect powering up the headunit. im thinkin i blew a fuse but if anybody has any other ideas let me know.