[Healeys] *** SPAM ***Re: Timing light query (OOPS)

[Randy Alkins]

Why wouldn't it work on positive ground car? Just hook red to positive like the block and black to negative like the solenoid lug from the battery.

> On March 12, 2019 at 11:39 AM David Nock <healeydoc at gmail.com mailto:healeydoc at gmail.com > wrote:
> 
> 
>     If your car is Positive ground the timing light will not work. If you are
>     positive ground you will need to use another battery to power the timing
>     light.
> 
> 
> 
> 
>     David Nock
>     healeydoc at sbcglobal.net mailto:healeydoc at sbcglobal.net
>     209 948 8767
>     www.britishcarspecialists.com
> 
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>     -----Original Message-----
>     From: sentenac.rw at gmail.com mailto:sentenac.rw at gmail.com
>     Sent: Monday, March 11, 2019 10:13 PM
>     To: Michael Oritt
>     Cc: Healeys
>     Subject: Re: [Healeys] *** SPAM ***Re: Timing light query (OOPS)
> 
>     The problems I was mentioning only happen if you use the car's
>     batteries for a supply to the light. If you use an independent
>     battery and don't somehow link one side of the supply battery to the
>     car's chassis you shouldn't have a problem.
>     -R
> 
>     On Mon, 11 Mar 2019 22:07:19 -0700, you wrote:
> 
>     >Polarity also matters in a different way if your timing light has a
>     >metal case and one of the power leads is grounded to the case, as
>     >mine is. If you use a 'regular' timing light designed for negative
>     >grounds in a Healey with a positive ground system, and if you then
>     >touch the case to the chassis or engine you will get a lot of sparks
>     >at a minimum, and maybe do some welding where you had not intended to.
>     >
>     >-Roland
>     >BN1 #724
>     >
>     >On Mon, 11 Mar 2019 21:32:53 -0400, Michael Oritt wrote:
>     >
>     >>Simon--
>     >>
>     >>The 12VDC lead does not need to go to the battery, merely a source of
>     >>power
>     >>whether or not it is part of your car's electrical system. I don't know
>     >>how your engine is configured but you can take power off of the starter
>     >>solenoid, coil hot lead, etc. etc. Polarity does matter, however.
>     >>
>     >>Best--Michael Oritt
>     >>
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