Just have wired installed and now have question.

**cwho122** · 03-26-2004, 12:06 AM

Hi, I just have a stereo guy to install the power wires to the PSU in the trunk. THe guy asked me where should the Switched line goes to, Ignition or Accessory? Then i looked at the OPUS instruction and answered "Ignition".
After spending a while read through the posts here, I am getting worry that I might did the wrong thing! Should I have him installed to the Accessory line rather than Ignition? Will my setup still able to power up the computer and off? I don't have an OPUS yet so I can't test it so I am looking forward to hear what the experts say here.

THanks,

**P4_2.66GHz** · 03-26-2004, 09:38 AM

Acc is the right one.

**samc** · 03-26-2004, 09:42 AM

drink a yoohoo and relax..

**sfay93** · 03-26-2004, 09:47 AM

I like the IGN wire myself. ACC wire would show voltage for a moment before the crank and then again after you crank. I am not sure but I think this would throw 2 seperate momentary pulses to the mobo.

**god_of_cpu** · 03-26-2004, 09:51 AM

Doesn't matter, the OPUS will filter out momentary pulses, the power has to be off for a bit before the shutdown signal will be sent.

Originally Posted by sfay93

I like the IGN wire myself. ACC wire would show voltage for a moment before the crank and then again after you crank. I am not sure but I think this would throw 2 seperate momentary pulses to the mobo.

**carpcnoobie** · 03-26-2004, 10:25 AM

Originally Posted by sfay93

I like the IGN wire myself. ACC wire would show voltage for a moment before the crank and then again after you crank. I am not sure but I think this would throw 2 seperate momentary pulses to the mobo.

This also depends on the arrangement of the ignition key.

Some keys go..

ACC -- Only radio and accessories
LOCK
OFF
ON-- Engine running, everythign on
START

Some keys go...

LOCK
OFF
ACC
ON
START

**P4_2.66GHz** · 03-26-2004, 10:37 AM

We might be confusing a thing or two here.

The way I would interpret wires:
ACC - On when igintion key is in ACC, ON, Start positions.
IGN - On when the car is cranking.

**sfay93** · 03-26-2004, 10:39 AM

ACC wires do not have power during start/crank. Only in the ON and ACC positions.
IGN wires have power in the ON position and through crank.

**P4_2.66GHz** · 03-26-2004, 11:03 AM

Originally Posted by sfay93

ACC wires do not have power during start/crank. Only in the ON and ACC positions.
IGN wires have power in the ON position and through crank.

You're right! I looked it up in the manual. The starter one is called ST, not ignition.

The ON one is the IGN.

**MatrixPC** · 03-26-2004, 11:04 AM

Can't speak for all cars but most japanese cars (Toyota, Honda, Nissan, Madza, )with key arrangement like this:
LOCK/OFF-ACC-IGN-START
ACC has power when key in ACC, IGN
IGN has power when key in IGN, START.