Ok - that is the supply side voltage to the coil?  And the tach wire
attached to the same pin by way of a blade connection. So how is the
pulse generated  for the tach to pick up. ie - how does that work, anyhow.

Just trying to learn here.

Thanks,

John

On 1/9/2014 5:32 PM, Project Pat wrote:
> +15 is key-on 12v.
>
> -----Original Message-----
> From: JRodgers [mailto:jrodgers113@gmail.com]
> Sent: Thursday, January 09, 2014 6:27 PM
> To: Project Pat; vanagon@GERRY.VANAGON.COM
> Subject: Re: 88 GL Tachometer Inop after New Coil Install
>
> OK - two wires got to a combination plug. No way to get that plug wrong
> - won't fit but one way on the blades on the coil. However - on the
> other side of the coil - there are two wires with their own individual
> plug. These two plugs fit on the blades of a common pin on the coil.
> This pin is marked +15. The thin wire off that connection is the tach
> wire I'm pretty certain. But with both wires made to fit that one
> connection there should be no issue. But there is.
>
> One of the 4 wires to the coil has to be an input wire - but I don't
> have a clue. Got to find a wiring diagram.
>
> Thanks,
>
> John
>
> On 1/9/2014 4:44 PM, Project Pat wrote:
>> Only 2 leads on the coil, key-on 12V and pulsed ground.
>> Obviously tach wire goes to pulsed ground.
>> Whip out a multi meter and figure out which is which.
>>
>>
>>
>> .
>>
>
>