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Re: Spitfire coil voltages

To: Atwell Haines <Carbuff@scooter.net>
Subject: Re: Spitfire coil voltages
From: Charlie Brown <cb1500@erols.com>
Date: Thu, 19 Jun 1997 03:01:30 -0700
Cc: triumphs@Autox.Team.Net
References: <MAPI.Id.0016.00617262756666203030303730303037@MAPI.to.RFC822>
Atwell Haines wrote:
> 
> I'm attempting to install a Crane XR700 ignition module in a 1979 Spitfire 
>1500.   The DPO had installed a Pirhana ignition many years ago, and I wasn't 
gettin
> 
> I'm getting battery voltage at the coil with the ignition switch in the ON 
>position (engine off).  Shouldn't I get much less?    (like six to nine  
volts?)

Yes, if you disconnect the supply voltage lead (white/yellow crimped to white 
at connection) from the "+" terminal and check the voltage at the wire's end. 
With a stock coil, and the ballast resistor wire in place, the voltage should 
read about 7 or 8 volts (with the ignition switch in the "ON" position--with 
the switch in the "START" position, the voltage should read very close to 
battery voltage). 
> 
> My Bentley Bible predicts (it never seems to tell you for sure!) that 
>resistance wire is used rather than a ballast resistor.   I see the wire 
leaving the star

'79 Spits have a ballast resistor wire bundled into the harness that runs down 
the driver's side of the engine bay. The wire is pink/white, and both ends 
poke out of the harness, and are usually crimped at the lower end to a plain 
white wire, and at the top end to a white/yellow.
> 
> Since I don't want to blow out the new ignition, could someone tell me what 
>voltage to expect on the + side of the coil,  both key on and start?   I wont 
actua

See above. Do you know if you have a OEM (6v.)coil? If you're using a Lucas 
Sport coil or Bosch Blue, you don't need the ballast wire--they're internally 
ballasted.

> I'll be under the dash, waiting for your message.   Thanks!
> 
> Atwell (the Human Pretzel) Haines
> '79 Spitfire FM96062
> '88 Lotus Esprit
> '88 Mustang 5.0
> 
> CarBuff@scooter.net



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