Cavalier Headunit ISO Wiring

Post by **Envoy CDX** » Fri Nov 09, 2007 12:36 am

Below you will see an attached file, of which it shows what pins do what job on he Vauxhall Cavalier Mk3 wiring loom

If you have any questions, please do ask.

*revised*

Post by **Envoy CDX** » Thu Jan 03, 2008 1:02 am

bump

Is this now sticky worthy?

Gaz · Post by **Gaz** » Thu Jan 03, 2008 12:22 pm

Yea its going to be one of those question ive stickied it

Post by **Envoy CDX** » Thu Jan 03, 2008 12:45 pm

Gaz wrote:Yea its going to be one of those question ive stickied it

kool.

dave's.veccy · Post by **dave's.veccy** » Thu Jan 03, 2008 8:29 pm

One note id like to add, the Alarm trigger wire, Brown and violet, if Earthed to your stereo casing, it will protect your stereo with the factory alarm

Post by **vaux24v** » Tue Jun 16, 2009 4:39 pm

brilliant|!!!!! i just posted on mig about this and was going to post here. some tit cut the iso off on my car lol

crocadmin · Post by **crocadmin** » Tue Sep 22, 2009 7:40 pm

this is good to know...mind iv fitted so many head units, subs & amps i could almost do it in my sleep lol

Post by **Robsey** » Thu Nov 19, 2009 1:06 am

Just noticed that the diagram says that pin 5 (Blue/Red - ABS wheel speed signal for speed dependent volume control) is for the SC804...

Strange though as my Grundig SC303 Tape Radio and later my CD300 CD Radio both had this function and connection.

And just for info, this ISO layout continues on all cars upto September 2004
(i.e. this includes vectra b, omega b and early vectra c plus the similar aged astras, novas, corsas, zafiras etc).

Post by **expreaper** » Sat Oct 09, 2010 9:25 am

I would like to know how i am able to use my head unit on ignition turn 1.

Can it be done, So far i have had to turn the red and yellow wires around so it saves the radio station and my set up ect.

Post by **Robsey** » Sat Oct 09, 2010 11:08 am

I would like to know how i am able to use my head unit on ignition turn 1.

This cannot be done on the cavalier ignition switch, although I have read that the Vectra-B switch has pin for position 1 usage

So far i have had to turn the red and yellow wires around so it saves the radio station and my set up ect.

This is normal practice on ALL Vauxhalls, (To swap the red and yellow wires for after market headunits).

droofer · Post by **droofer** » Wed Oct 27, 2010 9:06 pm

excellent topic very useful !
thanks!

Post by **Robsey** » Thu Oct 28, 2010 1:27 am

Robsey wrote: And just for info, this ISO layout continues on all cars upto September 2004
(i.e. this includes vectra b, omega b and early vectra c plus the similar aged astras, novas, corsas, zafiras etc).

Suppose I should clarify, that the power (Red, Black, Brown and grey/green wires, along with the speaker wires are the same).

The remaining wires in the ISO connector may have differing functions.

Post by **planetc** » Thu Oct 28, 2010 5:12 am

except Vauxhall and Sony seem to have a difference of opinion on which is switched live and which is battery live, lol

Post by **Robsey** » Thu Oct 28, 2010 12:25 pm

Yep, goes for most after market makes..

Vx red to Sony / kenwood etc Yellow (Memory Live)

Vx Black to Sony / kenwood etc red (Ignition Live)

Vx brown to Sony / kenwood etc black (Chassis Ground)

Post by **cavi-martin82** » Fri Feb 24, 2012 8:51 pm

Only way i can seem to get my cd player to light up and come on is by moving the live for cd player to re/blue wire on top left of power plug as you face it with locking pin at too also.... Is this right as it doesnt come on with any other wire thats supposed to be marked as switched ignition live....im lost lol every time i brake to a stop the cd player goes off and turns back on with me pulling away??? Please help me!!

Post by **Robsey** » Fri Feb 24, 2012 10:29 pm

Does this make it any easier to check your wires against.

Post by **cavi-martin82** » Mon Feb 27, 2012 1:58 am

Yeh its number 5 on this diagram i have power from to my cd player?? Only one that switches on and off with the ignition

Kevwaggy · Post by **Kevwaggy** » Mon Feb 27, 2012 10:50 am

Rob's skills in MS Paint never cease to impress

DAN90 · Post by **DAN90** » Thu Aug 30, 2012 6:55 pm

Can I ask where you guys get your 12v feed from? mine (when the engine is off) cuts the stereo out because of low voltage, when running its fine. I want to re-wire the live but not sure where from. Cheers

Post by **Robsey** » Thu Aug 30, 2012 8:04 pm

DAN90 wrote:Can I ask where you guys get your 12v feed from? mine (when the engine is off) cuts the stereo out because of low voltage, when running its fine. I want to re-wire the live but not sure where from. Cheers

The radio goes off when you turn the ignition off? - This is normal. - It is what they call ignition logic.

The red wire goes to Fuse 20 (10 amps)
The black ignition live wire goes to fuse 15 (15 amps).

Some radios can have their ignition logic turned off, however it would mean that you then need to manually turn the radio on and off.
Also, if you want - Vauxhalls will normally allow you to run the radio for one hour with the ignition off, before it automatically turns off again. This is to save flattening your battery.
Just press the radio's on button for that.

If you have issues with low voltage, then this would be due to a weak battery.

The only remedy for this is a new battery.or tighten, clean the battery terminals.

DAN90 · Post by **DAN90** » Thu Aug 30, 2012 8:09 pm

I have a new battery and fuses.

It's not when I switch the car off, it's when the car isn't running and I have the radio up pretty loud it will shut the radio off. If I have it at the same volume with the car running its fine. My brother said I have a bad live feed so just wondered where you get your feed from, would the caravan (number 28 fuse) constant 12v be a good source?

Post by **planetc** » Thu Aug 30, 2012 9:44 pm

Deja vu? Pie has just been through the same thing and ran a new feed wire direct from the battery to cure it.

DAN90 · Post by **DAN90** » Thu Aug 30, 2012 9:56 pm

planetc wrote:Deja vu? Pie has just been through the same thing and ran a new feed wire direct from the battery to cure it.

Good'ol cavs

So I'd be ok taking one from the caravan hitch constant 12v?

Post by **Robsey** » Thu Aug 30, 2012 10:14 pm

Nope -

What you need to do is run a heavier gauge wire direct from the battery, with an in-line fuse as near to the battery as possible.

Run this wire direct to the permanent live wire of your aftermarket radio's ISO connector.
Do not bother to connect it to the Car's ISO connector.

In brief
a) Thick wire from battery to in-line fuse.
b) Thick wire from in-line fuse directly to the permanent live wire of the aftermarket headunit.

I mis-understood the cause of the issue - should have guessed, it was because you are runnig a very power aftermarket head unit.

DAN90 · Post by **DAN90** » Thu Aug 30, 2012 10:33 pm

Robsey wrote:Nope -

What you need to do is run a heavier gauge wire direct from the battery, with an in-line fuse as near to the battery as possible.

Run this wire direct to the permanent live wire of your aftermarket radio's ISO connector.
Do not bother to connect it to the Car's ISO connector.

In brief
a) Thick wire from battery to in-line fuse.
b) Thick wire from in-line fuse directly to the permanent live wire of the aftermarket headunit.

I mis-understood the cause of the issue - should have guessed, it was because you are runnig a very power aftermarket head unit.

I'll do that cheers, what rating fuse would you recomend?

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