18 & 3x Signals on Holden 3.8

[Peter Gargano]

According to Gregory's Service and repair manual (# 249), under
Fuel and Engine Management (page 105 in my edition, this is for
VN models) indicates the procedure:

  1. remove the ignition control module wiring connector
     (this is the connector UNDER the coil pack) RH side
     of the module.

  2. connect terminal N and P of the wiring connector together.

  3. connect terminal M of the wiring connector to EARTH.

  4. connect a test lamp from ignition control module
     wiring connector terminal H [or G] (-ve) and battery (+ve)

  5. rotate crankshaft and you should see the test lamp go on
     and off 3 times [or 18 times] per revolution.

Note that they use a test lamp, so you may need a resistor (100 ohms?)
if you wish to use the multimeter.  Tell me if it works, okay?

PG.

Geffro wrote:
> 
> i want to check the output of the 18 and 3x crank signals of a 3.8 litre V6
> Holden with a multimeter but am unsure as to how
> I realise these are both voltage readings but will this actually show me
> the readings turning on and off or does it happen too fast
> Cheers
> Geoff

-- 
Peter Gargano     peter at mail.techedge.com.au
Ph: +61 2 6251 5519     Fax: +61 2 6251 6646