New headunit, strange issues

Tiny
FIREHAWK0_0
  • MEMBER
  • 2003 CITROEN C2
  • 1.1L
  • 3 CYL
  • FWD
  • MANUAL
  • 92,000 MILES
I've recently installed a new pioneer radio in my C2. I went to halfords bought a autoleads converter look, a wheel control adaptor and a powered ariel adaptor. After installing it all, and taking a live feed from the cigarette lighter all seemed to work fine, but no. If you leave the car for sometimes even 5 minutes I can no longer unlock the car with the remote, and when I unlock the door with the key only the drivers door unlocks. The radio also seems to be indecisive as to whether it remembers its settings or forgets them.

This is my first radio install, but nothing seems apparently wrong. I've had a few people check it out and they don't see any problems. Reading up on it and it sounds like a few people have this issue. Any ideas?
Many thanks in advance
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Wednesday, April 6th, 2016 AT 7:37 AM

3 Replies

Tiny
CARADIODOC
  • EXPERT
I'm not familiar with your car model, but as far as the station memory, all electronic radios have two power wires. One is the "switched 12 volts" that turns the radio on when the ignition switch is turned on. The second one is for the station presets and clock memory. That has to connect to something that stays live all the time. It sounds like you have that one connected to the wrong circuit. Typical acceptable circuits include the horn and the brake lights. On a lot of cars the cigarette lighter is not live when the ignition switch is off.

There are also some cars that do not have a ground wire in the radio's connector. There is a separate ground strap for that purpose that must be used. A lot of people try to figure out which is the ground wire by measuring them with an ohm meter and mistakenly find the dash light or tail light circuit because with so many bulbs, they read very low resistance to ground. The tail light circuit is tied to original radios to make the display dim at night, and they're tied to the dash light circuit to tell the display how much to dim.

If you mistakenly use one of those lighting circuits for the new radio's ground, you will either blow a fuse, or the radio will stop working or stop working properly when the dash lights at less than full brightness.
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Wednesday, April 6th, 2016 AT 12:57 PM
Tiny
FIREHAWK0_0
  • MEMBER
Thanks for the reply, I'll have a look at the ground and check a Haynes manual for a wiring diagram. Ill also check out the live, I took the cigarette lighter as the temporary live so I don't understand why it plays up.

On a side note after a minute it sound like a relay closes/opens so maybe the permanent live isn't permanent?
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Wednesday, April 6th, 2016 AT 2:36 PM
Tiny
CARADIODOC
  • EXPERT
Yup. Check if your cigarette lighter works when the ignition switch is off.
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Wednesday, April 6th, 2016 AT 3:27 PM

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