Hi Jay,
You're correct. The solenoid is a relay. I've never measured the resistance of
the Tiger's starter solenoid but I think the current it draws is probably
within reasonable bounds for the starter switch and wiring. The mini starter I
have in my Tiger has a built-in solenoid that also acts as the Bendix drive
engagement and it draws about 20A. This is enough to soften the insulation of
the standard wiring... and it will eventually then short to something more
significant, usually at a bad time (such as a SUNI autocross). Thus, it's
probably a good idea to have a relay driving this kind of solenoid or at least
to bump up the wiring from the stock 16 gauge to something more beefy.
Theo
> -----Original Message-----
> From: tigers-bounces@autox.team.net [mailto:tigers-
> bounces@autox.team.net] On Behalf Of Jay Laifman
> Sent: May 20, 2013 5:39 PM
> To: Tiger's Den
> Subject: [Tigers] Relays, ignition switch and starter solenoid
>
> A number of people have responded to my posts about adding relays to
> help out the ignition switch. First, keep in mind that this is my
> father's car. Rest assured that he has added relays for various
> systems.
>
> That said, my problem here was getting juice to the solenoid. It sure
> seems to me that the starter solenoid is in fact already a relay!!!!
> Right? Is anyone really running a relay off the starter switch to
> simply power the wire that triggers the starter solenoid?!
>
> One other point, in playing with an ohmeter and the switch, I get the
> sense the any weakness in contact was not the internals of the ignition
> switch itself (which is pretty beefy in there). But in the tabs off
> the back which seem to have some dark coloring that inhibits
> electricity. That's easy to clean - but per my previous post, I'm
> still not clear on how to clean the insides of the female connectors,
> which are presumably as in need of cleaning as the male tabs.
>
> Jay
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>
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>
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