I just purchased the Pioneer DEH-P7700MP and when I finished wiring up everything and turned on the radio everything was fine. I turned the cd player to radio and crank the volume up to like 40 and all of a sudden the entire unit shuts off completely. I turn the key off on my car and then turn it on again and the radio turns on with no problem and so I tried to crank the radio up again and the same thing happened again. I was like wtf is going on? I have no idea what's going on. When I did the key off and on again the radio never turned on again. Can someone tell me what's going on? I'm really worried that something went bad.

 

Isnts there a small fuse in the back of the radio?You might could catch,or ur grounds.Sounds like a fuse blew,maybe one under the dash.

 

Which fuse would it be under the dash?

 

So the radio turns on fine but when you turn the volume up it shuts off right? That sounds like a shorted speaker lead, grounded speaker lead, or a blown speaker to me.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Auex &raquo;</TD></TR><TR><TD CLASS="quote">So the radio turns on fine but when you turn the volume up it shuts off right? That sounds like a shorted speaker lead, grounded speaker lead, or a blown speaker to me.</TD></TR></TABLE>Ditto that, it is definitely not a blown fuse, [or it would not turn on again.

The other possibility, [and I don't know if a Pioneer will do this] is that there is a lack of current on the HUs constant power, [yellow], if it is connected to the oem radio harness constant power, it will not be getting enough current, on today's "high power" HU we connect the HUs constant power, [yellow] directly to the batt, just like you would an off board amp. 94

 

I'll check my speaker connections again. The issue i'm having is that when I turn on the radio and crank it to 40 it shuts right off and doesn't come back on again. The weird thing is this morning the radio started working again but when I crank it to like 35 and leave it at that the radio died again about a good 10 minutes.

FCM: Yes my pioneer is connected to the oem constant power. Could it be because my headunit is not ground enough? cause before I installed my radio I was looking around cause I didn't have a radio for nearly a month and checked out the wires there were two grounds. How would I wire my unit to the battery btw?

 

I think I know your prob, Try grounding the radio to the chassie or some other point. I have had this problem before, The other ground might not be a true ground. I was in the same boat on a customer car. Till I made my own.
Fcm, the pioneer radio will sound better if you take power from the battery. I tried it yesterday on my shop work truck teg. It has a pioneer premeir 8600mp and 6.25 pioneer rev series coxail. One ten inch pioneer tsw10. The output of the headunit changed dramatily. You could hear the diffrence right away. I suggest everyone with a high output headunit to doo the same. I know the older alpines or the ones 2 years ago recconmend this. I not a big alpine man nor a dealer, But this is what we did when we sold them at cc. Good luck.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Racersky &raquo;</TD></TR><TR><TD CLASS="quote">FCM: Yes my pioneer is connected to the oem constant power. Could it be because my headunit is not ground enough? cause before I installed my radio I was looking around cause I didn't have a radio for nearly a month and checked out the wires there were two grounds. How would I wire my unit to the battery btw?</TD></TR></TABLE>First, I know of no Honda/Acura that has 2 grounds in the oem radio harness, your not mistaking the red/black for a ground are you?

For the HUs constant power, [yellow] the best way to do it is to run a fused 10ga or 12ga wire from the batt. to behind the HU and connect the constant, [yellow] to that, and as wrx-killer has suggested, you can ground the HUs ground wire, [black] directly to the cars chassis, or if you use the oem radio harness ground. [black] you will need to run a ground wire 10ga or 12ga, form the chassis of the HU, [you can connect it using the back support screw/bolt] and connect the other end to the cars chassis, and as wrx-killer has said, it will make a big differance in the HUs performance, even if you were not having a problem with it.

BTW what car are we talking about here? 94

 

I'm installing the radio into my 96 EK Coupe. Can you explain to me how to run a fused 10 gauge or 12 gauge wire from the battery to the headunit? I'm a newbie but I'm learning. How would I go about grounding the ground wire from the headunit to the chasis? Any pics of yours if you have any? Also, if I were to use my oem radio harness ground how would I run a 10ga or 12ga from the chasis to the HU if it's connected into the radio adapter plug? Another thing the wire you said red and black it's not it. Both the wires were both black. The one black I'm talking about was independent but was connected in a way to the harness that my car came with.

 

Sorry I can't post any pix that aren't already out there. but it's simple, run a wire, with a fuse as close as you can to the batt., into the car through existing grommet or you can drill a new hole in firewall and install a grommet, run it to behind the HU, and connect the yellow to it, it's not that hard.


To run a ground from the HUs chassis, using the same gauge wire as the power wire you ran from batt., crimp/solder a ring terminal on one end that will fit the back brace screw/bolt on the back of the HU, [all HUs have a back brace screw hole on the back of the unit, make sure the wire is long enough to reach a good ground point on the cars chassis below the unit, [there are lots of bolts holding things to the chassis] use the appropriate ring term. at that end and try to use one that goes into the floor pan of the car.

Here is a pin out/colors of your oem radio harness http://www.installdr.com/Harnesses/HA-Wiring.pdf 94

PS this may also help http://www.installdr.com/Insta....html

 

Imma try this tomorrow and hopefully it works.....if not I'm gonna return the radio in exchange for another one. Cause if this next step fcm is telling me to try doesn't work I'm gonna make an assumption that the radio is defected in a way.

 

I still don't understand how to run a fuse to the battery

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Racersky &raquo;</TD></TR><TR><TD CLASS="quote">I still don't understand how to run a fuse to the battery</TD></TR></TABLE>

what dont you get?

Take a wire and run it to the positive battery terminal. Then get something like this:
http://www.radioshack.com/prod...earch
and put it inbetween the yellow wire from your head unit and the wire you ran from the battery

heres a pic i made

 

But put the fuse closer to the battery, within 18 inches.

 

thanks man forgot about that

 

If you've connected the wiring harness correctly you really shouldn't need to run a serarate power wire just for the HU. Re-check your connections. The problem is probobally the groud connection like mentioned above. Some HU's have a ground screw on the back of the unit, if not just extend the one coming from the HU harness and use a ring terminal and connect it to a bare metal bolt. Make sure any unused wires have been wraped with electrical tape.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by zumiez007 &raquo;</TD></TR><TR><TD CLASS="quote">If you've connected the wiring harness correctly you really shouldn't need to run a serarate power wire just for the HU.</TD></TR></TABLE> Wrong, with most of today's "high power" HUs you will have to run a lead from the batt. as the stock constant power and lead can't deliver the current that is needed, today's HUs constant needs 10A, 15A and even 20A of current on the constant power, and as the stock constant power on most Honda/Acuras, is for memory only and fused at 7.5A, [almost always shared with other things in the car that need constant power]
connecting to the stock radio harness power will not be enough, and normally leads to dimming lights and poor SQ on the HU or blowing the 7.5A fuse. 94

 

I rewired my entire radio harness including my factory and check to see if that's the problem first since it only cost me like 2 bucks(not 2 hundred 2 dollars lol). That didn't work so I rewired all my speakers in the entire car with new wirings and that didn't work. I then did the groundings and that didn't work and my last option was to run the battery wire directly to the battery itself and what do you know fcm's recommendation works. I wired it with the fuse holder for safety precaution in case something happens. It seems to me the headunit is not getting enough power that was the reason why when I crank the volume it demanded more power but it wasn't enough. Plus before I did everything I return the headunit and got the same one but brand new. The tech was like don't worry we'll send it out stating the pioneer headunit you have had a problem and Sorry for the inconvienence that this may have cause you. Now I'm happy to have a working radio and all i need is an mp3 cd and I'm set for a whilez. Anyone care to recommend me some songs for my Mp3 Cd? or is there a thread for that already? I'll try the search button and see what I can find first.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fcm &raquo;</TD></TR><TR><TD CLASS="quote"> Wrong, with most of today's "high power" HUs you will have to run a lead from the batt. as the stock constant power and lead can't deliver the current that is needed, today's HUs constant needs 10A, 15A and even 20A of current on the constant power, and as the stock constant power on most Honda/Acuras, is for memory only and fused at 7.5A, [almost always shared with other things in the car that need constant power]
connecting to the stock radio harness power will not be enough, and normally leads to dimming lights and poor SQ on the HU or blowing the 7.5A fuse. 94</TD></TR></TABLE>

Amen! Theres no way that the stock harness constant can give enough power. It dosnt even come straight from the battery it powers up other stuff 2. Another thing the little hole on the back is to strap the unit to the frame

 

the hd was used in the first place? lol that would be the cause of ur worrys right from the start! lol congrats on the working unit.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Racersky &raquo;</TD></TR><TR><TD CLASS="quote">my last option was to run the battery wire directly to the battery itself and what do you know fcm's recommendation works. I wired it with the fuse holder for safety precaution in case something happens. </TD></TR></TABLE> Surprise........ It is the most common problem I have seen in my shop, [and my installer still sees] when customers come in with HUs they installed or ones that were installed by My Buddy Install inc. 94

 

lol my cd came back from the other headunit and pioneer wrote me a letter saying that this is my fault because of a speaker shortage which cause the headunit to blew out. I highly doubt that the headunit blew out but just didn't have enough power.

 

I would "e" mail them back and tell them the new unit did the same thing and your problem was fixed by wiring to the constant directly to the batt., maybe they will start supplying a fused lead to run from the batt. and instructions on how to run it and why. 94