Sounds like the blower motor dropping resistor.
Usually, they are mounted INSIDE the blower housing to prevent lint on
the coil from igniting and also to air cool the resistor.
The schematic for the 1970 model just shows the wires in question going
to the heater blower but have a look at the attachment which is for a 1967.
It shows what you describe.
Regards,
Graeme Suckling
nissanman.shutterfly.com
Adelaide
South Australia.
On 14/03/2013 12:54 PM, Chris wrote:
> Hi everyone
> We are restoring a 1970- 1600 Roadster. The restoration is just about
> complete but have a couple of questions about some of the finishing. First on
> the windshield pillar at the top where the plastic trim along the top edge of
> the windshield meets the weather strip that goes down the pillar and around
> the door opening. Does the plastic strip go on top so the weather-strip butts
> up against it or does the weather-strip go right to the top of the pillar? Is
> there any finishing clips or anything else that goes on this corner? The next
> question is that there is a center tap coil on a plastic block, maybe 4b x
> 1b , the coil is around 1/2 in. in diam., it has 4 wires going to it, the
> wires are blue with black and red tracers, the wires are in the same bundle
> that goes to the heater blower motor. I canbt find it on the wiring diagram
> and was told it was specific to a 1970 model. It looks like it might get hot
> and should maybe be mounted on the firewall? Any ideas what it is and what it
> does?
> Thanks for reading
> Chris
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[demime 1.01d removed an attachment of type application/pdf which had a name of
1967_5%20%20Datsun%20Sports%20Wiring%20Schematic%20rev4.pdf]
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