Andrew and list,
If there is an isolator switch on the "J" type OD, then the manual from
which you quote is incorrect. The purpose of the isolator switch(s) is to
permit OD selection only is those gears which activate it. Therefore two
conditions must be met in order for the solenoid to be on:
1. The column switch must be on.
2. An isolator switch must be on.
Ed Woods
----------
> From: Andrew Dixon <adixon@loudoun.com>
> To: triumphs@autox.team.net
> Cc: 'Gernot Vonhoegen' <gernot.vonhoegen@stir.ac.uk>
> Subject: RE: od again - long response
> Date: Thursday, April 23, 1998 12:44 PM
>
>
> Carl,
> I realize this came from a manual but unless I'm reading this wrong, this
is
> the same condition as when the steering column switch is on. The contacts
> are just electrically stuck. This provides potential but until one of the
> isolator switches is closed there is no path to ground, therefore no
current
> flow through the solenoid, therefore no engaged solenoid. As the manual
> section reads to me, you'd have OD in all gears whenever you turned the
> switch on.
> Andy
>
> On 04/23/98 09:04 AM Musson, Carl said...
> >
> >>From the service manual for Overdrive Unit with Electrical Control (Pub
> >#502274) p.7
> >
> >a) Built into the relay are switch contacts which switch the current to
> >the solenoid when the coil is energized. Should these contacts stick
> >"IN" then the od would be operative on all gears including reverse.
> >
> >To Check: Remove wire from hot feed (probably starter solenoid
> >switch/white) to operating switch. Check the relay contact [c2] on the
> >overdrive relay on the solenoid side. If it is "alive" then the
> >contacts are sticking.
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