Re: 1985 XJ6 Aerial Question (kind of long)

[twagner@mail.island.net (Tom Wagner (guru of old stuff))]

>My power aerial for my 1985 XJ6 is dead :-(
>
>I am planning an aftermarket but thought I would check the wiring and other
'stuff' before replacing.
>
>
Mine has been rewired, so I have been into it pretty deep.

The relay unit is driven by the radio by a White/Pink wire.  There is a fuse
in the radio circuit that only operates the relay circuit (don't ask me why
they just didn't put a fuse in the line from the radio to the relay). When
the radio is turned off or the engine is shut down the relay applies power
by a Blue/White wire to the antenna to run it down.  If the radio is on and
the engine (or accessory ) is on the relay pulls and a Blue/Black wire runs
the aerial up.  These two latter wires get the power from the same fuse as
the clock, map light and boot light.  There was a wierd circuit for
controlling the height of the aerial.  They put a switch in the circuit that
let you bypass the normal up down wiring and "jog" the antenna up to a
particular height.  It was still supposed to allow the aerial to go down
when the radio was turned off.  I had that switch, it now replaces the relay
and I run the antenna manually.  Relay is in the boot with the motor.  3
wires from relay to motor.  1 wire from relay to console, where the manual
switch is, one wire to radio from console (if a P.O. has not just jerked it
out from the switch).  Strangely enough the Series III factory manual makes
no reference to the radio connection and the diagram makes no reference to
the manual switch.  Try to figure the reasoning on that one...

Aftermarket antennas (especially for Japanese cars and Fords) that I have
seen do not leave the power on the up or down circuits.  If you use one of
these you will have to be sure the power is not left on or the motor will
burn out.  General Motors antennas work with power, but are too big to fit
in the fender.

Never have seen one with a single wire.  It is possible that the single wire
is for the power and there are still 2 terminals for a switch to ground the
up/down operating circuit.  That is fairly standard.  As all the electricals
are in the boot you would have to put in extra wires to a switch for a
"non-compatible" unit.  

Tom, who would much rather be wiring his Jag right now than plumbing his new
bathroom..

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