[Healeys] Overdrive relay

[BJ8 Healeys]

No, Per, mine is not working that way.  That's the problem.  The overdrive
relay is energized through the dash switch, and even with the throttle
switch contacts jumpered (ensured closed), and thereby continuity between
relay terminals C1 and C2, the relay will lose power when I turn off the
dash switch without touching anything else.  The throttle switch is supposed
to maintain the relay in an energized state until you step on the
accelerator (what I call "latching").  
Somehow, it seems that the relay coil is only getting power through the dash
switch.

Steve

-----Original Message-----
From: Per Schoerner [mailto:healeyguy at bredband.net] 
Sent: Wednesday, September 16, 2009 11:02 AM
To: healeys-request at autox.team.net; BJ8 Healeys
Subject: Re: [Healeys] Overdrive relay

Steve
That's not the way it works. The wiring outside the relay is such that 
when you energize the relay it will provide currency to hold itself. 
When you step on the accelerator pedal the cut out switch will break 
this currency so that the relay cuts off. In fact, it's nothing special, 
you can use any relay you have on the shelf, it doesn't matter.

Best regards, Per in Sweden

BJ8 Healeys skrev:
> Hello, Healeyphiles -
>  
> Just curious if anyone has ever taken apart an overdrive relay and
> understands the function of the piece that is attached to the upper end of
> the coil and zigs around to "restrain" the moveable contact in the opening
> direction?  
>  
> I have a used relay and a brand new Moss replacement (Made in the UK!)
that
> works the same way out of the box.  I am not getting a "latching" function
> to hold the overdrive engaged when I flip off the dash switch.  The last
> time this happened, it was the relay, but this time a new one ain't fixing
> the problem.  I think the part mentioned above is key to how the relay
> latches, but haven't quite got it scoped out yet.
>  
> Thanks,
>  
> Steve Byers
> HBJ8L/36666
> BJ8 Registry
> Havelock, NC  
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