RE: IML: Head Lights

["Dick Benjamin" <dickb@xxxxxxxxx>]

The horn is an inductive load (meaning any switch or relay has to deal with
a big spark each time the horn button is released).  The headlights are a
pure resistive load, which is the easiest thing to switch.  All cars use a
relay for the horn switching for this reason.

Dick Benjamin

-----Original Message-----
From: mailing-list-owner@xxxxxxxxxxxxxxxx
[mailto:mailing-list-owner@xxxxxxxxxxxxxxxx] On Behalf Of Rob van der Es
Sent: Thursday, July 28, 2005 11:00 AM
To: mailing-list@xxxxxxxxxxxxxxxx
Subject: RE: IML: Head Lights

at Steve B.

Very strange that the factory did use a relay for the horns, but not for
the headlights.
I wonder why ?

Robert

1960 Imperial Crown 4 door HT



> You can get the halogen version of your lights off the shelf at most any
> auto parts store.  You might consider adding a headlight relay if you are
> going to change the bulb type.  Adding the relay will give you brighter
> lights by avoiding the voltage drop of the existing wiring and switch and
>  also remove the load from your head light switch that is difficult to
> replace.  The bad side of adding the relay would be that the draw of the
> headlights would no longer be reflected on your amp gauge on the dash and
>  could cause it to not alert you if you have charging system problems.
>
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>
> Steve B.
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> --
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