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Darthmjh
Newbie


Joined: 22 Aug 2017
Posts: 39
Location: NW London


PostPosted: Fri Jan 12, 2018 7:22 am    Post subject: Lights / Radio Signal Issue Reply with quote

I noticed an issue in the 993 whilst coming back from the Bicester Heritage Scramble. I had the radio on and if I turned on the main headlights on, the radio signal gets very bad, but if I turn the lights down to side lights everything is okay.

I believe I have HID lights.

Could it be a bad earth?

Cheers

Mike
 
  
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Endoman
Suzuka


Joined: 11 Apr 2011
Posts: 1074
Location: Bolton U.K.


PostPosted: Fri Jan 12, 2018 9:41 am    Post subject: Reply with quote

Sounds like a bad contact in the HID circuit or a failing component (bulb or ballast). Check for flickering. Usual culprit is the socket behind the headlight bowl give it a squirt with some contact cleaner and check earth for HID ballast.
The start up current on HIDs is quite high so a bad contact will cause arcing and erosion leading to eventual failure.
Is it Tore's kit or one with an external ballast?
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Darthmjh
Newbie


Joined: 22 Aug 2017
Posts: 39
Location: NW London


PostPosted: Fri Jan 12, 2018 8:52 pm    Post subject: Reply with quote

Endoman wrote:
Sounds like a bad contact in the HID circuit or a failing component (bulb or ballast). Check for flickering. Usual culprit is the socket behind the headlight bowl give it a squirt with some contact cleaner and check earth for HID ballast.
The start up current on HIDs is quite high so a bad contact will cause arcing and erosion leading to eventual failure.
Is it Tore's kit or one with an external ballast?


Thanks for the feedback, I will take a look. I don’t know what kit it is it came with the car. It’s Andy’s old car, madalla on here.

Cheers
Mike
 
  
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Darthmjh
Newbie


Joined: 22 Aug 2017
Posts: 39
Location: NW London


PostPosted: Sun Jan 28, 2018 11:22 pm    Post subject: Reply with quote

Endoman wrote:
Sounds like a bad contact in the HID circuit or a failing component (bulb or ballast). Check for flickering. Usual culprit is the socket behind the headlight bowl give it a squirt with some contact cleaner and check earth for HID ballast.
The start up current on HIDs is quite high so a bad contact will cause arcing and erosion leading to eventual failure.
Is it Tore's kit or one with an external ballast?


Had a little time today and took the headlights out and sprayed the sockets with contact cleaner. Unfortunately made no difference.

However have worked out it is the left light by removing and replacing each one at a time. On the left side there are a couple of connectors fitted and tapped badly with electrical tape. When I have time I will replace the connectors.

Inside the light under the cover are two separate black boxes. Which I assume are the ballast.
 
  
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madalaa
Fuji


Joined: 13 Mar 2008
Posts: 9297
Location: West London

2009 Porsche Boxster (987)

PostPosted: Mon Jan 29, 2018 6:25 am    Post subject: Reply with quote

Hi Mike sorry to hear of the problem. I very rarely drove ate my night and it was even more rare for me to play the radio. I had them fitted on one of my trips to Carnewal. Hope you find what’s causing it and I hope everything else is working well and that you are enjoying the car.
 
  
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ToreB
Approved Trader


Joined: 13 May 2010
Posts: 561
Location: Oslo, Norway


PostPosted: Mon Jan 29, 2018 6:49 am    Post subject: Reply with quote

A HID ballast contains a switch mode power supply. If not properly designed, or if it malfunctions, this can cause radio interference.
Cheers,
Tore
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Bergvill F/X
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Darthmjh
Newbie


Joined: 22 Aug 2017
Posts: 39
Location: NW London


PostPosted: Tue Mar 27, 2018 6:13 pm    Post subject: Reply with quote

Update: I looked online for this issue and a few people resolved it by adding ferrite clips onto the cable(s) in the lights.

So I bought a pack of ferrite clips, as I didnt know the size of the cables and this evening gave it a try.

I put 1 round the black wire from the ballast on each light and this made no difference. I then tried adding to the pink wire and hey presto it is much better. Not 100%$ but close.

Hope this helps someone else if they have the same issue.

Mike
 
  
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