Where is everyone tapping into for the remote turn on while keeping the stock radio? After you have marked that wire and set it aside, turn the ignition switch on, turn the headlights on, and turn the dimmer switch - if equipped - all the way up. Newbie . Ignition hot wire location. i am assuming that one of the wires from the factory plug switches a relay inside the factory deck to turn on the 12v. For example , if a module will be powered up and it sends out the signal of half the voltage in addition to the technician would not know this, he'd think he offers a challenge, as he would expect a new 12V signal. It could also create a risk of fire if the fuse for your unswitched source is too large for the wiring of your switched source. How to Wire an Ignition Switch by Michelle Schaefer . Radio Ignition Switched 12V+ Wire: Black/Blue Radio Ground Wire: Brown Re: Bugging you guys again about stereos!!! Ignition hot wire location. Posted 16th Mar 2011. when the car ignition is turned off all power is lost to stereo not even enough to remember the code, can this be sorted if the stereo has a constant live and not having a remote live off the ignition? I can't find a radio wiring loom diagram anywhere, even an image. Jump to Latest Follow 1 - 6 of 6 Posts. 1-+12 VOLT IGNITION WIRE. In the good old days there would be a 12v Feed and a switched 12v Feed. The car radio 12 vdc constant was switched with the 12 vdc key switched power. Jupiterimages/Polka Dot/Getty Images. 12 Volt Universal Ignition Switch Wiring Diagram from www.ford-trucks.com Effectively read a electrical wiring diagram, one has to find out how the components within the system operate. Lol, theres little to none. I've bought a Bluetooth module which connects to the AUX port in my B-Class W245 2005, very similar (if not identical) to this one. With pin 8 being the earth, pin 6 being the dashboard illumination feed to the radio, and pin 5 being the radio switched 12V feed to the aerial (and also goes back to the white wire feeding the lights on warning buzzer in the RS2). The manual says to connection both (from the radio) together and straight through to the permanent if you want it to be 'always on'. Thread Tools: January 26th, 2006, 06:22 #1: EllisD75. The other "hot" wire from the car harness (indicated to be red) is also 12vdc but is "switched" through the ignition switch when actuated with the key. All the wires have been matched up except that one. Aug 8, 2009 at 11:47 AM #2. sdgd711 Full Access Member. Getting it from fuse box would be my last option. This is not advisable, and is almost certainly not what you want. Radio Constant 12V+ Wire: Orange Radio Ignition Switched 12V+ Wire: Class 2 Serial Data Radio Ground Wire: Black/White Radio Amplifier Trigger Wire: Pink Left Front Speaker Wire (+): Tan Left Front Speaker Wire (-): Gray Right Front Speaker Wire (+): Light Green Right Front Speaker Wire (-): Dark Green Left Rear Speaker Wire (+): Brown Use the diagrams to properly match each with its appropriate wire from the car. 12 – Telephone audio input signal right, positive . I have perminent power fine, but when I turn the ignition on 12V isn't appearing across the switched wire and the ground wire. Radio Constant 12V+ Wire: Orange Radio Ignition Switched 12V+ Wire: Class 2 Serial Data Radio Ground Wire: Black/White Radio Amplifier Trigger Wire: Pink Left Front Speaker Wire (+): Tan Left Front Speaker Wire (-): Gray Right Front Speaker Wire (+): Light Green Right Front Speaker Wire (-): Dark Green Left Rear Speaker Wire (+): Brown I believe I saw somewhere that this is found at the fuse box and not at the radio wiring harness. 2004 Chevrolet Silverado Stereo Wiring Information. I've followed that yet when I switch the engine off, I lose all my presets. one that is only live when the car's ignition is on (or is in the 'accessory' position, which not all cars have). vinylandtrinkets 15. I can run the stereo fine, except the stereo only works when either the engine is running, or the ignition is in position 2 (Dash board information lights are all on). Once you are sure that the ignition is off, proceed to probe the wires on the switched portion of the ignition switch (refer to figure 1 above). Share this post. if this is true, does anyone know what wire that is? The ACC wire needs to be connected to car igniton. I'm no longer trying to directly wire it to the battery. I have tried finding a feed from the hazard switch and the graphical computer to no avail. If you place a jumper wire between a always-on 12V source and a switched 12V source, you've now turned your switched wire into an always-on wire (with power supplied from your original always-on source). The ACC wire offers power/electricity only when you insert car key into ignition switch and turn it to the left. I have everything connected right - however there is one wire from the new radio's wiring harness that doesn't have a match on the old one. The car uses a CAN-BUS digital communication protocol, which transmits, among other things, ignition status of the car. The wire that shows less than 12V at that point is the dimmer/illumination wire. I believe the 12 vdc constant power is just to maintain memory and clock type functions. 0. susie-4964 Posts: 23,143. This car has no switched 12v wire in the harness, forcing me to tap into the cigarette lighter for that switched power source. 6 Light switch signal 7 +12v constant from battery 8 Ground How it should be (ISO compliant): 1 Steering wheel control (later models) 2 Steering wheel control (later models) 3 Not used. I am looking for a 12V power source that is integrated with the key ignition. I want the stereo to come on when the ignition key is in position 1. 2003 Oldsmobile Bravada Car Radio Stereo Audio Wiring Diagram Car Radio Constant 12v+ Wire: Orange Car Radio Switched 12v+ Wire: Yellow Car Radio Ground Wire: Black Car Radio Illumination Wire: Gray Car Stereo Dimmer Wire: Brown SOURCE: Need to know what color the 12V ignition wire. 2.Wire name: 12V battery(+) Color: Yellow. Sadly that was too simple - most radios now have multiple 12v feeds, but it is very rare to have a switched 12v feed - they now rely on a computer to turn them on, the computer communicates over the CANBUS. 3-+12 ... 10 – Telephone mute (mute switch for radio) 11 – Telephone audio input signal left, positive. The old radio only had a constant power wire which I attached to it's match on the new radio. The 12 volt constant power wire is usually yellow or blue, though it may be a number of colors coming from the car. If you find two more wires that show approximately 12V, then turn the dimmer switch down and check again. Link to post Share on other sites. The antenna wire is much thicker with a metal head and can be connected separately before you install the stereo. For connection to the car kit, on the radio loom -or adjacent to-where do I find +12v battery line Ground, car battery Car radio mute Car ignition sense Thanks for any help. That unmatched wire is labeled: 12v ignition/switched power. There are several checks you can carry out to trace the source of the interference. I use the removal of the head unit face to switch the unit off, and fit it to turn on. Step 3: Connect the starter relay wire The starter relay wire needs to be connected to the Start terminal located on the ignition switch. Join Date: Jan 2006. Hello All, Can anyone point me to a source of 12 V ignition switched source near radio harness? 9-SPEAKER RR+. Once the multi-meter is grounded, ensure that the ignition switch is in the "off" position. 4 +12v constant from battery 5 Remote for antenna amplifier etc. The standard wiring arrangement is to have the ignition switched 12V feed going to pin 7 and the permanant 12V feed from the battery to pin 4. User Name: Remember Me? The wiring of the radio has an option of either a permanent connection or the ignition switch. Wiring guage for installing switched 12V for stereo/radio Polo ... the wire from the ignition switch is a Black/Red wire ( 1.0mm) pin 4 might be marked as "S" this feeds to fuse 19 5 amp and this leaves the fusebox as a Black/Brown wire (0.5mm) and goes to the Onboard power supply unit on plug 73A pin 42 . The yellow wire must be connected to a permanent 12 volt feed in the car (that is where 12 volts is supplied even when the car is switched off with the key out of the ignition). Password: Register/Join: FAQ: Photos: Calendar: Search: Today's Posts : Mark Forums Read: VW MKV-A5 Golf/Jettas Discussions area for A5/MkV Jetta/Golf (2005/2006 PD and 2009 CR). Car radio interference originates usually in the ignition system, the charging circuit or among electrical accessories. kennyboy 0 kennyboy 0 I'm new! TEST THIS WIRE WITH YOUR DMM. The fuses are all intact, and I have no idea where to go next! So you should get 12v then it drops when you crank then when the car is running it should be 12v again. Hi, the best place to take a feed for this is from the thick black/yellow wire on the back of the headlight switch. The 12v feed would keep the memory, and the switched feed would turn the radio on/off with the Key. The idea behind the switched live is that you can’t accidentally leave the head unit on, while the always live retains the head units settings (tone and radio stations). You should have 12v in ACC and Run ONLY. The main purpose of the switch is to allow the operator to safely engage the ignition system and activate the electric starter. All the other switched circuits are too sensitive to carry additional loads of any size. Jul 17 2012, 7:55pm. When you probe a wire that supplies 12v you know you have found a constant 12v … wiring a car stereo and avoiding the ignition. Describtion of 12V battery(+) wire: The 12V permanent battery wire will always offer power/electricity when the vehicle is turned on or off I am not looking for the accessory electrical source which remains on for 20 minutes after turning the car off. Electrical Question - Switched ignition wire in stereo wiring loom? 07 Jan 2011, 19:58. 5. Sorry – as Luke said, I think it’s a bad Idea to use the Switched live (ignition wire). The red wire is designed to be connected to a 'switched' 12 volt supply i.e. As per the instructions, the bluetooth module's 12V wire needs to be connected to an ignition switched 12V wire from the car. Spin Ignition/Switched 12v wire? The rest of the harness wires are for the speakers. I am wondering how to add the 12v ignition to the aftermarket stereo? I just recently got a 2009 Silverado z71 LT3 package with the Bose system and was wanting to put my amp and subs in, but there are no ignition hot wires. 3 +12v switched with ignition 4 +12v constant from battery 5 Remote for antenna amplifier etc. 14-SPEAKER LF-2-GND. Multi-pin connector 4, 12-pin, for CD changer control and CD audio input signals . Open the harness and you'll see large gauge wiring and look for the black/light green. Interference is either radiated - that is, picked up by the aerial - or conducted to the set by its own wiring. here is the factory wire diagram colors from the Olds manual. The ignition switch in a motor vehicle is the main electrical component used by the operator to start, run and turn off the vehicle. Im installing a Nokia car kit CK-15W on a 2003 Vectra C, standard radio. Thanks in advance. any idea how to do this? 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