In reply to a message from Les Halls sent Mon 14 Nov 2016:
Hey Les. Complicated. We may need Lloyd to wave his hands.
The S1.5 wiper motor is unique as you know. Before they lost
their cloth covers the three wires from the motor were coded
R, N and G. The wires are normally encased in a grey plastic
sheath that attaches at the base of the motor. If you
discretely sever the sheath at the motor you can slip the
sheath up a bit to reveal the wire coding, otherwise you’re
in for trial and error.
The N and G wires are usually taped together and the R wire
is singular. On the original harness, the N wire attaches to
a Nlg wire. But as I recall you have an Autosparks
replacement harness so this doesn’t apply. It’s the one
place in the S1.5 harness they got the coding wrong,
although the wire locations are right.
In the Autosparks harness here are six wires in this
location. R from the motor goes to siamesed Rlg wires in the
harness. G attaches to the G harness wire, which goes to the
fuse box. That leaves three unassigned wires, Ylg, U and B.
I used the U wire as substitute for Nlg wire in the original
harness. The Ylg and B are redundant.
Looking at the back of the switch there are four terminals,
three in use. The fourth is ganged to the one beside it.
With the switch in the off position, do a continuity test
between the ganged terminal and the remaining two. Where
there is continuity, the motor N wire (U in the dash
harness) goes. R from the motor (Rlg in the dash harness)
goes to the ganged terminal. The remaining terminal goes to
ground.
There are 9 possible combinations.–
The original message included these comments:
The wiper motor runs ok but it doesn’t change speed and it gets hot to
the touch. Seeing as the colors of the wiring coming out of the wipe
motor have long since disappeared and now look like three dirty white
wires, I thought perhaps that one of you bright sparks (pun intended)
might have some idea of what might be measured to determine the
correct wiring.
–
Nick Saltarelli '68 Cdn mkt E-type S1� OTS, '54 XK120SE OTS
Niagara, Ontario, Canada
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