Gary,
According to the wiring diagram that I am looking at for 66/67 roadsters
the wire that goes to the oil pressure sender is Yellow/black. That wire
should come out of the harness and go to the oil sender on the lower edge
of the block, just behind the alternator. This wire should no connect to
anything else in the engine compartment. From your discription it seems
that your is also connected to the points in the distributor, which
shouyldn't be. The stock point wire is Black and should connect to
the screw on the side of the distributor, go into the harness for a few
inches and then connect to the - terminal on the coil. There is a
Black/White wire on the + terminal of the coil that goes to the ballast
resistor mounted under the coil. The other terminal on the ballast
resistor should also be Black/White. With the key on you should have 12V
at one end of the ballast resistor, and, depending on whether the points
are open or closed, either 12V or about 6V on the other end.
As for the oil sender, I am at work now and can't get to the car until
this evening. The resistance of the sender is quite low as I recall. The
gauge is current operated, which doesn't need a great swing in resistance
to work.
If you don't have a wiring diagram for your car you can find one on line
at http://home.istar.ca/~datsun/wiring.htm and click on the diagram of
choice.
Hope that helps.
Peace,
Pat
- Support Habitat for Humanity, A "hand up", not a "hand out" -
Pat Horne, Network Manager, Shop Supervisor, Future planner
CS Dept, University of Texas, Austin, Tx. 78712 USA
voice (512)471-9730, fax (512)471-8885, horne@cs.utexas.edu
On Thu, 4 Apr 2002 Geegc@aol.com wrote:
> Oil Pressure Sender Grounded Stops the Engine??
>
> I have been putting the 1966 Red 1600 back together for months, and had it
> running a few weeks ago (albeit badly). I continued to hook up the electrics
> and seemed to have it all back OK when I tried to start the engine again.
>
> No spark.
>
> I checked the coil -- had voltage. I checked the ignition wires, OK. And
> there was voltage to the top of the dizzy (I have an old Allison electronic
> ignition). So what could be the problem?
>
> Then I looked at the yellow black wire to the oil pressure-sending unit that
> connects with a screw into the top of the round silver part below the dizzy
> and at the back of the engine. Was that connected when it last started?
> Don't think so, so perhaps I'll take it off. Wow, the engine turned right
> over and started again.
>
> Question -- what is the relationship between connecting the yellow black wire
> to the oil pressure sending unit and the ignition not firing? And what's
> going on with the sending unit -- it appears to be grounded even where the
> wire connects. Shouldn't there be some resistance between the sending unit
> pick up and the frame?
>
> Could someone with an ohmmeter and the same type of oil pressure unit tell me
> what resistance they get from the pick up wire to the chassis? Does it have
> voltage when the power is on? I may have a short or be missing an insulator
> down there.
>
> Thanks. I want to get this puppy running again so I can make it to Slovang.
>
> Gary C
> Red one
> Black one
>
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