[928uk] bulb monitor ecu

[George Layton]

 From what I recall when I fitted a 3rd brake light to my GTS (it was 
many years ago and my brain is now old) the light takes its power from 
the circuit on 1 side at the rear. I understood that the bulb monitoring 
unit had to be changed to allow for the now "unbalanced" load comparing 
one side to the other.

Perhaps the mobile phone kit drew power from the circuit on one side of 
a pair being monitored by the unit and so the unit had to be updated??

George.


On 03/06/2024 11:18, jonathanrackowe--- via 928uk wrote:
> Yeah, I struggled to see the connection between the bulb monitor unit and the 90's mobile phone kit… but then who would doubt the infallibility of rennlist info!! 😃 (joking comment for those reading this in plain text without emoticons)
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> Maybe 928 641 603 10 flashes the brake lights if you're on the phone! 😉  (another joking comment for those reading this in plain text)
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> Best regards,
> Jonathan
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> 1991 928 GT Amethyst Metallic
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> -----Original Message-----
> From: 928uk<928uk-bounces at lists.928.org.uk>  On Behalf Of Paul R Smith via 928uk
> Sent: 02 June 2024 16:12
> To:928uk at lists.928.org.uk
> Subject: Re: [928uk] bulb monitor ecu
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> I searched on this 928 641 603 10 in my PET, and it does find it, but it also shows
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> Market as USA.
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> It quotes this number for up to 1990 with or without option 612 (prep
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> for phone) and 1991 onwards with no mention of option 612.
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> I don't know what the link is with the phone kit, but it looks like it
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> is a red herring. 10 appears to be for all US versions 1987 onwards.
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> Smiffy
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> -----Original Message-----
> From:jonathan at rackowe.net  
> Sent: 02 June 2024 11:53
> To: phil rick<philrickse at gmail.com>
> Cc:928uk at lists.928.org.uk
> Subject: RE: [928uk] bulb monitor ecu
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> If anyone ever comes across 928 641 603 10, that was a version of the bulb monitor with modification for in-car telephone use.
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> 928 641 603 09 Bulb control unit - rear lights (on left of passenger gloves shelf in UK)
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> 928 641 603 10  Bulb control unit - rear lights with modification for in-car telephone use
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> 928 641 603 11 Bulb control unit - rear lights with additional high rear brake light
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> Best regards,
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> Jonathan
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> 1991 928 GT Amethyst Metallic
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