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On 25 Jul 2003 at 16:41, Mike Wodkowski wrote: > > You can figure the pins and resistances out from the Bentley manual > > Hm. Couldn't find the resistances location in the manual. You can glean the resistances, etc from the chart on page 22 of the fuel chapter. You would have to figure out the pin numbers from the wiring diagram on page19 (which is more correct for a 72 than that shown on page 18.) The diagram on page 18 is correct for 70-1. The diagram on page 19 is correct for 72-3 from CA, but non CA cars are the same except that they do not have any of the exhaust gas recirculation items. > Could you just hook a VOM to ground (or plug 31 <- is THAT ground?) and the > central plug and go on a plug by plug basis to perform these tests? Yes, in most cases you would just hook one side of the VOM to ground, but some of the measurements would require you to make a measurement between 2 different pins. Yes, term 31 is the standard German notation for a ground terminal. In all of this it is important to understand that you can only expect to find the source of an intermittent problem if you troubleshoot it while it is in its failed mode. If you check it out when its working fine it will seem fine. You have to make it fail in order to find it. I have sometimes resorted to attaching a VOM to a suspected trouble spot in such a way that I could simply glance at the VOM when the car failed. This would allow me to catch the flaw in the act, or clear the suspect. Either way, this can be difficult. -- ******************************* Jim Adney, jadney@vwtype3.org Madison, Wisconsin, USA ******************************* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org