Dunno about that. The horn gets its ground from the mechanical parts of the
steering column. I suppose you could have a poor ground on the column ( a
frequent reason for installing a horn relay) and the radio *could* be
grounded to the column, but I would have thought it unlikely. Possibly a
little less unlikely than using the purple/black (horn ground wire) for the
radio station memory instead of a plain purple.
If it *is* a bad ground, how about making it a good one?
PaulH.
-----Original Message-----
From: Tab Julius <tab@penworks.com>
To: Bud Krueger <bkrueger@ici.net>
Cc: Paul Hunt <paul.hunt1@virgin.net>; mgs@autox.team.net
<mgs@autox.team.net>
Date: 13 November 1999 21:49
Subject: Re: Ghost in the Machine (part deux)
>
>Well, stealing the ground seems to be the #1 vote so far...
>
>With that consensus, how should I consider fixing it?
>
>At 02:58 PM 11/13/99 -0800, Bud Krueger wrote:
>>Excuse me for not being specific re: colors, etc., I don't have a wiring
>diagram
>>handy. However --- I do recall that the horn is actuated by grounding the
>wire
>>coming to the horn switch. This means that the wire has 12v on it when
not
>>actuated. I'd be willing to venture a guess that the radio is getting its
>power
>>from this wire. Sounding the horn makes the line go to ground, removes
power
>>from the radio, goodbye presets. At least that's my $.02 worth.
>>
>>BTW, at least in my 77B, there is a separate wire for powering the radio
when
>>the key is turned to the first position.
>>
>>Bud Krueger
>>52TD
>>77MGB
>>
>>Paul Hunt wrote:
>>
>>> Could be two seperate problems, especially if your radio is connected to
>the
>>> purple circuit (hot, fused) to maintain the station memory. The horns
are
>>> also connected to this circuit and draw quite a significant current, so
if
>>> the purple fuse is grotty sounding the horn could cause a significant
>>> voltdrop on the circuit.
>>>
>>> PaulH.
>>> http://freespace.virgin.net/paul.hunt1/
>>> (or if that URL doesn't work try )
>>> (http://194.168.54.52/paul.hunt1)
>>>
>>> -----Original Message-----
>>> From: Tab Julius <tab@penworks.com>
>>> To: mgs@autox.team.net <mgs@autox.team.net>
>>> Date: 12 November 1999 17:02
>>> Subject: Ghost in the Machine (part deux)
>>>
>>> >
>>> >The other week I queried about how my radio mysteriously played on
after
>>> >the key was removed (and engine cut off, etc)., but the second I
>touched my
>>> >key to the ignition lock it disconnected (coincidence?).
>>> >
>>> >This morning, while having the radio tuned to FM 93.3 (playing a very
>>> >British Pink Floyd, btw), I realized that a quick honk of the horn
cleared
>>> >power to the radio and I was suddenly listening to static on the
default
>>> >89.7. I reset the station, did a quick re-test, and darned if honking
>the
>>> >horn doesn't pull the permanent memory power to the radio.
>>> >
>>> >I have a new radio to put in (not because of this, but because the
current
>>> >one is a cheapo), but before I do I'd like to appease the Ghost of
Lucas
>>> >and find what's rigged up wrong. Any ideas?
>>> >
>>> >- Tab
>>> >
>>
>>
>>
>>
>>
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