 | Home > In Car Electronics > Reverse Selected - Positive Feed? |
 
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| Go Beyond Member Since: 30 Jan 2012 Location: Headcorn, Kent Posts: 6676  
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So Steve, you are saying that the reverse light has an ignition controlled live and is switched via its earth .... I beg to differ ...
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16th Jul 2015 7:57pm |
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| munch90 Member Since: 26 Oct 2013 Location: guildford Posts: 3558 
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Im sure reverse switch switches live feed , because when i wired my work light in im sure i used the live so could have worklight on with reverse or not , ( was few years ago
 )Last edited by munch90 on 16th Jul 2015 8:04pm. Edited 1 time in total |
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16th Jul 2015 8:03pm |
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| custom90 Member Since: 21 Jan 2010 Location: South West, England. Posts: 19579
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Live with ignition on and with motor running not completely off. Similar to the lighter socket.
Two terminals I'd imagine being both being earth, live elsewhere. Earth in switch then earth out, if broken obviously no contract no current flows in the circuit. That's what I'd have thought anyway. Easy check by putting ignition on and in reverse and check for continuity on the earth terminal reverse light end and chassis.  
But once reverse is selected munch the live wire becomes live so then for your purpose you could then use the live to switch your extra lights. By relay on this I presume. Last edited by custom90 on 16th Jul 2015 8:05pm. Edited 1 time in total |
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16th Jul 2015 8:03pm |
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| Barney12 Member Since: 09 Jun 2015 Location: South West Posts: 744 
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OK, all good reading, more questions.... (Sorry!
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1. Is their enough amperage on the reverse light feed to power a camera* and reversing sensor controller?** 2. Any recommendations on cable type/size to create the loom to the front? *I'm considering this one mounted under the number plate lamp holder. http://www.amazon.co.uk/Reverse-Backup-Par...tream_2_dp **I've been looking at the Quanan kits which seem to get good reviews. http://www.ebay.co.uk/itm/230407804838?_tr...EBIDX%3AIT I'm liking Steves suggestion of making up a loom with a male and female econoseal connector so the original wiring is left intact. |
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16th Jul 2015 8:04pm |
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| PaulMc Member Since: 17 Jan 2009 Location: Kent Posts: 488 
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On a 2014 Defender, the reversing lights switch switches an ignition switched live, from F10 (10A) under the driver's seat, to the reversing light.
The reversing light circuit - Green/Brown (GN) wire can be accessed at the rear of the instrument pack, at terminal 26 on the 32-way instrument pack connector C1040 (C1040-26) . Paul. 1989 Arles Blue 2.5TD 110 Hardtop 1999 Epsom Green Discovery II 4.0 V8i 'XS' |
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16th Jul 2015 8:08pm |
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| munch90 Member Since: 26 Oct 2013 Location: guildford Posts: 3558
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Think your find the wire for controlling the camera that connects to reverse light is more a 12v signal then power if that makes sense , camera i guess would ony draw milliamps and same for reverse sensor controller
should say in the specs for the units |
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16th Jul 2015 8:10pm |
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| munch90 Member Since: 26 Oct 2013 Location: guildford Posts: 3558
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yes i am sure reverse light switches live |
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16th Jul 2015 8:12pm |
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| Barney12 Member Since: 09 Jun 2015 Location: South West Posts: 744
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Yes sorry. I was thinking the following connections from the reverse light:
1. Sensor back to HU (+ve) 2. Power to reverse camera (+ and -ve) 3. Power to reverse sensor controller (+ and -ve) Thus everything goes live when reverse selected. Barney (who currently has too much thinking time  ) |
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16th Jul 2015 8:14pm |
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| custom90 Member Since: 21 Jan 2010 Location: South West, England. Posts: 19579
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Barney - If you search on here there is such a thing as a 'double up mod' for doubling up reverse and fog.
Others have made up little looms ideal for your use only you'd need one you could make up yourself for your exact use. If you had a reverse camera it could be if manufacturer made be connected to the HU and powered though it's power source. Or permanent live fed and only switched on via the reverse feed. So the reverse light feed is used purely as a switch and the load from permanent live direct from the battery. If you use a Cam from the HU manufacturer it may well connect to it's own dedicated wiring, plug and play so to speak. Aftermarket I.e. Another make then it'd likely be hard wiring involved as I described above. I'd imagine the most likely scenario would be AV out from Cam to HU. Earth, 12v perm and 12v reverse switched. HU usually detects the AV in and auto turns on, on the screen. |
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16th Jul 2015 8:15pm |
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| Barney12 Member Since: 09 Jun 2015 Location: South West Posts: 744
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After much reading I'm currently favouring the Alpine iLX-700 as I'm a self confessed Apple Fanboy and use my iPhone more than anything else. I also have a dislike for Bluetooth and have always used a Brodit Mount and Holder.
The HU connections are pretty simple as far as I can see: RCA connection to camera:  Click image to enlarge Reverse signal: Click image to enlarge I've noticed that Alpine do provide an option for a rear camera https://www.dynamicsounds.co.uk/alpine-hce...tAodsVACSQ but cant see it does much other than provide power when it receives the reverse signal. £150!! That seems like a lot of money for that functionality! |
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16th Jul 2015 8:40pm |
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| leonvh Member Since: 31 Dec 2013 Location: Plombières Posts: 68  
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I initially had the cameras activated by a feed from the reverse light (use an Alpine single DIN HU with flipout screen), but found it annoying when manouvering back and forth: the image would turn on and off each time when swithcing benteen first and reverse. It always takes a second or so before the camera image is available
Now have a small switch on the cubby box to activate the cameras. Much better! Can now use it also for keeping an eye on the trailer when driving. You can seethe switch in some pictures in my gallery. L. |
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17th Jul 2015 7:35am |
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| Barney12 Member Since: 09 Jun 2015 Location: South West Posts: 744
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Those little rocker switches look very smart. Especially in the cup holder. They could pass as OEM.
Tell us more, what do all the switches do? What are the two chrome like capped units? |
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17th Jul 2015 7:49am |
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| leonvh Member Since: 31 Dec 2013 Location: Plombières Posts: 68
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Cupholder: left activates the cameras, right switches on the main beam of the Lazer RS4's.
Under-cubbybox safe: left switches on/off Lazer RS4 daylight running lights (current positioning in the grille is not within the officially allowed restrictions, so want to be able to switch them off easily when this imight become an issue). Other switches are reserved for future use (working lights). One capped unit is a double USB power-plug, the other is a standard cigarette lighter type powerplug. All is powered by a separate fuse-box and switched by several relays in the under cobbybox save. Even found a relay with a time-delay so now have coming-home functionality from the Lazer DRL's. L. |
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17th Jul 2015 8:22am |
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| custom90 Member Since: 21 Jan 2010 Location: South West, England. Posts: 19579
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A switch is a good idea hence why I mentioned it originally.
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17th Jul 2015 11:00am |
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